Electronics a Mcgraw-HILL PUBLICATION VOL

FEBRUARY 13, 1959 electronics A McGRAW-HILL PUBLICATION VOL. 32, No. 7 PRICE SEVENTY-FIVE CENTS

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Published by MICROWAVE AND POWER TUBE DIVISION, RAYTHEON MANUFACTURING COMPANY, WALTHAM 54, MASS., Vol. 1, No. 2

NEW ONE-WATT COMMUNICATION KLYSTRONS COVER GOVERNMENT AND COMMON CARRIER BANDS

Designed primarily for use in microwave relay links, the QK-661 and the QK-754, one-watt transmitter klystrons, operate at frequencies of 7,125 to 8,500 Mc and 5,925 to 6,425 Mc, respectively. The QK- 661 is the first tube of its kind to cover the entire government band. The QK-754 is the first of a planned series of tubes to cover the entire communications band.

Both are mechanically tuned, integral- cavity, long-life, reflex-type tubes. The QK-754 uses a coaxial output; the QK-661, Typical operating characteristics a waveguide output. QK-754 QK-661 Frequency Range 5925 to 6425 Mc 7125 to 8500 Mc Power Output 1.5 watts To insure efficient operation the tubes 1.6 watts Electronic Tuning 50 Mc 25 Mc are available with integral cooling fins (to half -power pts) Modulation or with a heat-sink attachment suitable Sensitivity 1 Mc/V 600 Kc/V for connection to the chassis. (10 V pk-to-pk mod volt) Temp. Coefficient ± 0.1 Mc/OC :I.- 0.1 Mc/oc

TYPICAL REFLECTOR VOLTAGE TYPICAL POWER OUTPUT (AT MAXIMUM POWER OUTPUT) vs. vs. FREQUENCY FREQUENCY

430 2,2

20 , 400 . 1.8 , 1 , 1.6 1 e QK-661 . Q1(-754 14 Efres-750V ,- 4"" : Eres -750V ' Modek 2% .: : Mode: 2% : QK-661

1 -mt 5925 MN» MC L.-- Eres -750V I Mode: 2% 303 1 , 1 i I 7113 to 11300 MC I I i 4 :Mode: 2% "8 I• 7123 M IMO MC I 250 --.I SM25 lo 4425 MC 1...--

200 38 60 6.2 64 66 68 70 72 74 76 78 80 82 84 86 58 60 6.2 6.4 66 6.8 70 72 74 76 78 80 82 84 86 FREQUENCY- K NIC FREQUENCY- KNIC

You can obtain detailed application information Excellence in Electronics and special development services by contacting: Microwave and Power Tube Division, Raytheon Manufacturing Company, Waltham 54, Massachusetts

A LEADER IN CREATIVE MICROWAVE TECHNOLOGY electronics FEBRUARY 13, 1959

Issue at aGlance

A McGRAW-HILL PUBLICATION BUSINESS Vol. 32 No. 7 SAC Prepares for Missiles. Visit to Strategic Air Command 30

Inside Man-in-Space Capsule. Total contract tops $15 million 35 H. W. MATEER, Publisher Japan Acts to Slow Licensing. Plateau for U.S. patents, tie-ins? 38 JAMES GIRDWOOD, Associate Publisher & Advertising Sales Mgr. How New Boat Units Work. More use transistors, printed circuits. 45 W. W. MacDONALD, Editor Shoptalk 4 Over The Counter 19 John M. Carroll, Managing Editor Feature Editor, John Markus. Electronics Newsletter 11 Market Research 24 Associate Editors: John M. Kinn, Jr., Frank Leary, Michael F. To- Washington Outlook 14 Current Figures 24 maino, Howard K. Janis, Sylvester Financial Roundup 19 Meetings Ahead 46 P. Carter, Haig A. Manoogian, Roland J. Charest, William P, O'Brien, George Sideris, John F. Mason, William E. Bushor, Ronald K. Jurgen, Thomas Emma, Samuel ENGINEERING Weber. Pacific Coast Editor (Los Angeles) Thyratron Controlled Heater. Operator inserts steel cylinder into Harold C. Hood; Midwestern Editor heating coil of thyratron powered and controlled induction heater. (Chicago) Harold Harris ; New Eng- See p 51 COVER land Editor (Boston) Thomas Ma- guire. How Radar Techniques Improve Induction Heating. Generator with »rt Director, Harry Phillips, Roy electronic switches develops 12 kw in workpiece at 10 kc. Thompsen. By H. L. van der Horst 51 Production Editor, John C. Wright, Jr., Bernice Duffy, Jean L. Sorting Components by Measuring Waveforms. Automatic detector Matin. determines component voltage and current characteristics. Market Research, Edward De- By B. Agusta 56 Jongh, Marilyn Koren. Editorial Assistants: Gloria J. Special-Purpose Magnet Wire Insulation. Insulations to meet Filippone, Arlene Schilp, Patricia unusual environmental and manufacturing needs... B. G. Sideris 60 Landers, Catherine McDermott, Eleanor Schaefer, Carol Weaver. Digital System Positions Shafts over Phone Line. Three master shaft settings are reproduced on remotely located slave shafts. By R. B. Palmiter 62 R. S. Quint, Assistant Advertis- ing Sales Manager and Buyers' Tailor Made Ferrites. Properties which suit ferrites to a wide range Guide Manager. Fred Stewart, of frequencies are outlined 67 Promotion Manager. Frank H. Ward, Business Manager. George Nonvacuum Devices Control Klystrons. Magnetic amplifier and tran- E. Pomeroy, Classified Manager. sistors provide afc in six-kmc microwave link By M. C. Harp 68 Hugh J. Quinn, Circulation Man- ager. Thermistor Data Chart. Chart saves time in finding resistance values for standard thermistor types By A. E. Lawson, Jr. 72 New York: Donald H. Miller, Henry M. Shaw, William J. Boyle. Boston: Wm. S. Hodgkin. San. Philadelphia: Warren H. Gardner. Chicago: Bruce Winner, DEPARTMENTS Harvey W Wernecke, Martin J. Ga!lay. Cleveland: P. T. Fegley. Research and Development. Artificial Neuron Uses Transistors... 74 San Francisco: T. H. Carmody, R, C. Alcorn. Los Angeles: Carl W. Components and Materials. Three Approaches to Stereo Pickups... 78 Dysinger, D. A. McMillan. Denver: J. Patten. Atlanta: M. Miller. Dal- Production Techniques. Progressive Die Forms Getters 82 las: Gordon L. Jones, Robert T. Wood. London: E. E. Schirmer. On the Market 86 News of Reps 125 Frankfurt: Michael R. Zeynel. Literature of the Week 120 Comment 126

Plants and People 122 Index to Advertisers 137

ELECTRONICS —February 13, 1959 1 third in a series

THE DIVISIONS OF THOMPSON RAMO WOOLDRIDGE INC. ++ RAMO-WOOLDRIDGE

While it is now a division of Thompson Ramo Wooldridge Inc. instead of a separate corporation, Ramo-Wooldridge remains an integrated organization for research, development, and manufacture of electronic systems for military and commercial applications. R-W's military work is covered by thirty-four contracts with the Army, Navy, Air Force, and other N The completely transistorized RW-30 airborne government and industrial organizations. These sup- The RW-300 digital control computer has broad digital computer has avolume of 4.19 cu. ft. applications in automatic process control, and weighs only 203 lbs., including power supply port a broad technical and—in some cases—manu- data reduction and test facility operation facturing program in such varied fields as Electronic Reconnaissance and Countermeasures; Microwave Techniques; Infrared; Analog and Digital Computers; Air Navigation and Traffic Control; Antisubmarine Warfare; Electronic Language Translation; and advanced Radio and Wireline Communication. In the commercial field, the well-known RW-300 industrial process control computer and associated equipment—the basis of the expanding business that Ramo-Wooldridge is responsible for advanced Systems are being developed for the ground electronic sub-systems development for application The Thompson-Ramo-Wooldridge Products Company is processing and interpretation of photographic and other data collected by aerial reconnaissance devices with both current and projected missile programs doing with process industries—was developed and is manufactured by the Ramo-Wooldridge division. Men, machines, and manufacturing know-how from other TRW divisions will be added as needed to build up the growing production strength of the Ramo- Wooldridge division. In other ways, too, the availability of the special skills and facilities of the rest of the corporate family will broaden the services R-W can offer to its customers. However, R-W's major systems

Important infrared "search and track" equipment work will continue to be done in an organizational The Military and Ramo-Wooldridge is now being developed by Ramo•Wooldridge are studying the use of automatic data for applications in modern U.S. Military aircraft framework that brings the engineering and manufac- processing techniques turing groups into close-knit project teams in the division's own integrated development and manufacturing facilities in both Los Angeles and Denver. Ramo -Wooldridge is production-oriented in the sense that its end objective is the manufacture and sale of equipment. However, because of the highly technical nature of its product lines, the R-W division will continue to give unusual emphasis to maintaining ahigh degree of professional scientific and engineering RAY is one of the major participants working competence. In research laboratory studies at Ramo-Wooldridge, with the Boeing Airplane Co. Systems Management electrically-charged particles are contained and Office on the U.S. Air Force Dyna-Soar project supported in avacuum by an alternating electric field

Thompson Ramo Wooldridge Inc.

MAIN OFFICES

CLEVELAND 17, 01-110 LOS ANGELES 45, CALIFORNIA

New type of radar data processing system developed by RAY materially increases the capabilities of ground defense radar

2 February 13, 1959 — ELECTRONICS 44;( 44 11ill 111111( Itern Mel n ¡kin i n Uni ltt /111 11111111 11 1111 MIMI IftUI 1/111111 111/11/1' IIJJUII 1111111M --

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CIRCLE 2 READERS SERVICE CARD SHOPTALK...

BUSINESS AND A BLUEPRINT. Directly and indirectly the Air electronics Force's Strategic Air Command is on of our industry's very best customers. What SAC plans today will have a direct and far-ranging Feb. 13, 1959 Vol. 32, No. 7 effect on tomorrow's market To find out what SAC is up to electronically, Associate Editor Mason Published weekly, with a BUYERS' GUIDE made a trip to the Command's underground headquarters near Omaha, and REFERENCE issue in mid-June, by Neb., by Air Force plane. His article, "SAC Prepares for Missiles," McGraw-Hill Publishing Company, Inc., first of a three-part series, begins on p 30. James H. McGraw (1860-1948) Founder. Mason has been following military electronics closely since he joined our staff late in 1956. He is especially well suited to the job. An Air Executive. Editorial. Circulation and Advertising Mee: McGraw-Hill Building, 330 W. 42 St., New Force navigator in World War II, Mason headed up an early Loran York 36, N. Y. Longacre 4-3000. Publication school. An alumnus of University of Mississippi and Mexico City Col- Bike: 99-129 North Broadway, Albany I, N. Y. lege, he has traveled widely in Mexico, Spain, Germany and North Africa. His experience also includes a stint with the Voice of America. See panel below for directions regarding subscriptions or change of address. Donald C. McGraw, President; Joseph A. Gerardi, NEWS SOURCES. We hear a lot these days about reporters and Executive Vice President; L. Keith Goodrich, editors fighting to keep their news sources confidential. Vice President and Treasurer; John J. Here's one extremely fruitful news source ELECTRONICS does not Cooke, Secretary; Nelson L. Bond. Presi- dent, Publications Division; Shelton Fisher, want to keep secret. It is the advertising pages in our own issues. Senior Vice President; Ralph B. Smith, Like many other engineers and businessmen in our industry, ELEC- Vice President and Editorial Director; Jo- TRONICS editors follow these pages closely. We often find there tipoffs seph H. Allen, Vice President and Director leading to top-ncttch engineering and business stories. Perhaps you too of Advertising Sales; A. R. Venezian, Vice have noticed the newsyness of our advertising. It tells the "with what" President and Circulation Coordinator. in our business, complementing the "how to" given in our engineering and business articles. Single copies 750 in the United States and possessions and Canada; $1.50 for all other foreign countries. Buyers' Guide $3.00. Sub- EDITORIAL INDEX. If you are a typical reader, you can take the scription rates—United States and possessions, annual index, or leave it alone. Like a telephone book, its handy to $6-00 a Year; 89.00 for two years; $12.00 for have around, but it's hardly choice reading matter for a winter's three years. Canada, 810.00 a year; 816.00 evening. for two years; 820.00 for three years. All other countries 820.00 a year; 830.00 for two Actually, getting the index together is a chore, but one that we do years; $10.00 for three years. Second class gladly to increase the permanent reference value of this magazine. postage paid at Albany, N. Y. Printed in It took Associate Editor Bushor, Mrs. Bushor and half a dozen full, U.S.A. Copyright 1959 by McGraw-Hill Pub- part-time and casual girls better than six weeks to put together our lishing Co., Inc.—All Rights Reserved. Title 1958 index. The end product, as we shipped it to the printer, was a registered in U. S. Patent Office. BRANCH 2 x 11 x 1-ft crate of 5 x 7 file cards, 4,500 cards all told. OFFICES: 520 North Michigan Avenue, Chicago 11; 68 Post Street, San Francisco For readers who may require additional copies of our editorial 4; McGraw-Hill House, London E. C. 4; indexes: we still have some copies of our 1958, 1957 and 1956 indexes 1, Rechneigraben, Frankfurt/Main; Na- available at 10é a copy. We have a few copies of our 1955, 1954, 1953 tional Press Bldg., Washington 4. D. C.; Six and 1952 indexes, same price. In fact, we still have 67 copies of our Penn Center Plaza. Philadelphia 3; 1111 1930-to-1949 cumulative index at $1 a copy. Henry W. Oliver Bldg., Pittsburgh 22; 55 Public Square. Cleveland 13; 856 Penobscot Bldg., Detroit 26; 3615 Olive St., St. Louis Coming In Our February 20 Issue . . . 8; 350 Park Square Bldg., Boston 16; 1301 Rhodes-Haverty Bldg., Atlanta 3; 1125 West Sixth St., Los Angeles 17; 1740 Broadway, MICROWAVE HAZARDS. With average power output of radar, Denver 2; 901 Vaughn Bldg., Dallas 1. radio and countermeasures transmitting equipment continuing to ELECTRONICS is indexed regularly in The increase, the hazards to humans from focused concentrations of r-f Engineering Index. energy call for new and special precautions against possible biological damage. Within the last two years, massive research sponsored by the Subscription: Address correspondence to: Ful- Defense Department has attempted to enlarge understanding of the filment Manager, Electronics, 330 W. 42nd biological effects of microwave exposure. St., New York 36. N. Y. Allow one month for change of address, stating old as well as new Next week, Associate Editor Leary describes the results emerging address. Subscriptions are solicited only from persons engaged in theory, research, design, from this program. His article points up safety ériteria to the elec- production, management. maintenance and use tronics industry and indicates several paths for additional research. of electronics and industrial control components. parts and products. Position and company connection must be indicated on subscription orders. PULSE POSITION DEMODULATOR. For a telemetry system to be useful, linearity must be of a high order, in the region of one percent or better. Linearity of the system must be preserved in the Postmaster: please send form 3579 to demodulator lest transmitted accuracy be negated. Electronics, 330 W. 42nd St., New York 36, N. Y. L. Weisman and E. Teltscher of Ford Instrument Co., have devised a highly linear ten-channel demodulator made extremely compact by 4 .1 extensive use of solid-state components. Input circuit is a modified semiconductor diode AND gate.

Member ABP and ABC F-M SOUND DETECTOR. Design of a transistorized television receiver requires an efficient, low-cost sound strip. Marvin Meth of CCNY's electrical engineering department discusses a unique oscillating linear-slope detector injection-locked by a one-stage audio amplifier. Device is highly sensitive, exhibits excellent a-m rejection.

4 February 13, 7959— ELECTRONICS TAKE YOUR CHOICE ... of these two dependable wirewound resistors

MINIATURE

VITREOUS-ENAMEL POWER RESISTORS Sprague's new improved construction gives even 1lEalik======e=t greater reliability and higher wattage ratings to famous Blue Jacket miniature axial lead resistors. A look at the small actual sizes illustrated, em- phasizes how ideal they are for use in miniature fica—Crie electronic equipment with either conventional wiring or printed wiring boards. Get complete data on these dependable minified resistors, write for Engineering Bulletin 7410. TAB-TYPE BLUE JACKETS: For industrial applications, awide selection of wattage ratings from 5 to 218 watts are available in Sprague's famous Tab- ALL UNITS Type Blue Jacket close-tolerance, power-type wire- ACTUAL SIZE wound resistors. Ideal for use in radio transmitters, electronic and industrial equipment, etc. For complete data, send for Engineering Bulletin 7400A. —411:2111=111-41

, • 1%. 1--czes----1/// iffe\\\41 NEW SMALLER SIZE

MOM* ---rwereeme INSULATED-SHELL POWER RESISTORS New Koolohm construction features include welded leads and winding terminations—Ceron ceramic- insulated resistance wire, wound on special ceramic core—multi-layer non-inductive windings or high resistance value conventional windings—sealed, insulated, non-porous ceramic outer shells—aged-on- load to stabilize resistance value. You can depend upon them to carry maximum rated load for any given physical size. ALL UNITS ACTUAL SIZE Send for Engineering Bulletin 7300 for complete e, technical data. SPRAGUE ELECTRIC COMPANY SPRAGUE® 35 MARSHALL STREET • NORTH ADAMS, MASS. THE MARK OF RELIABILITY

RESISTORS •CAPACITORS • MAGNETIC COMPONENTS • TRANSISTORS • CERAMIC-BASE PRINTED NETWORKS LINTERFERENCE FILTERS Ile PULSE NETWORKS • HIGH TEMPERATURE MAGNET WIRE • PACKAGED COMPONENT ASSEMBLIES _

ELECTRONICS — February 13, 1959 CIRCLE 3 READERS SERVICE CARD 5 Experience—the added alloy in A-L Stainless, Electrical and Tool Steels

JIL-4750 GuARANTEEIr

PERMEABILITY o Mira.1.111 3 e IMPROVEMENT

PERCENT IIIIINIIINLLrL

11.1111Mem lo 2000 200 GAU0SSES—STANDARD TEST FLUX DENSITIES '.014 and .006 Strip

GUARANTEED PERMEABILITY... and at higher values than old average values in AL-4750

AL-4750 nickel-iron strip now has higher permeability And research is continuing on silicon steels including values than ever before .. . and the new, higher value6 AL's famous Silectron (grain oriented silicon steel), as are guaranteed. For example, using the standard flux well as on other magnetic alloys. density test, at 40 induction gausses, AL-4750 now has Another service of Allegheny Ludlum includes com- 57% higher permeability than in the past. And perme- plete facilities for the fabrication and heat treatment of ability values are guaranteed. laminations. Years of experience in AL's lamination This guaranteed permeability means greater consist- department means that Allegheny Ludlum has en- ency and better predictability for magnetic core per- countered and solved most problems common to core formance permits careful, high performance design. materials. This practical know-how is available to all. The improvement in AL-4750 didn't just happen. It is Call us for prompt technical assistance. Write for blue the result of Allegheny's electrical alloy research and sheet EM-16 for complete data on AL-4750. production program in nickel-bearing steels. A similar Alleghany Ludlum Steel Corporation, Oliver Building, improvement has been made in AL Moly Permalloy. Pittsburgh 22, Pa. Address Dept. E-14.

WSW 7269 ALLEGHENY LUDLUM STEELMAKERS TO THE ELECTRICAL INDUSTRY

Export distribution, Electrical Materials: AIRCO INTERNATIONAL INC., NYC 17 Export distribution, Laminations: AD. AURIEMA, NYC 4

6 CIRCLE 4 READERS SERVICE CARD February 13, 1959— ELECTRONICS •

tree..

New techniques, new instrumentation, factually reported for you in the HEWLETT- PACKARD JOURNAL

Typical subjects - Fetreer

MICROWAVE DEVICE NOISE FIGURE. What it means, how to measure it, automatic noise figure re- "NO-CONNECTION" MEASUREMENTS OF DC cording, new meters and noise sources. CURRENTS. New milliammeter approach requires no soldering; doesn't load circuit. MEASURING DC VOLTAGES DOWN TO 1 V. New techniques, new instruments permit direct read- AUTOMATIC PRINTED RECORDS FROM DIGITAL ings of extremely small voltages. VOLTMETERS; straightforward method of recording; new equipment available. TESTING QUARTZ PLATES FOR 5 x 10 -8 WEEK ACCURACY in new 10 MC electronic counter.

YOURS WITHOUT CHARGE FROM

The Journal, reporting throughout the year on measuring developments in all spectra, is sent without charge to engineers in electronics and allied fields. Simply write:

EDITOR, Hewlett-Packard Journal 5222A Page Mill Road Palo Alto, California

Complete Coverage in Electronic Test Instruments

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ELECTRONICS — February 13, 1959 CIRCLE 5 READERS SERVICE CARD CIRCLE 6 READERS SERVICE CARD--> PIONEERS OF THE THERMAL FRONTIER

SYSTEMS FOR MISSILES

Monsanto

NEW FLUIDS FOR THE MISSILE AGE ; •1 MISSILE PERFORMANCE

with more compact, lightweight hydraulic components, cooling and refrigeration units

Smaller components pay off in higher performance ... savings in inches and ounces add up to hundreds of additional miles per hour — or miles in range.

Eastern Industries' missile components and systems are miniaturized to meet the most rigorous requirements in space and weight. Through the use of Monsanto Coolanol* 45 and miniaturization concepts, Eastern now makes it possible to design more power, more performance into less and less volume and weight. HIGHER . . . Eastern electronic tube cooling units and systems permit avionic operation at alti- Avionic Cooling with Coolanol 45: This Monsanto-produced fluid is the answer to tudes which rule out air cool- heat problems associated with miniaturized electronics .. . extends operations to ing. The cooling pack shown easily handles 1000 watts at altitudes where air cooling is impractical. Having a high boiling point, Coolanol 45 altitudes to 60,000 ft. permits "hotter," smaller systems than with water cooling; low foaming tendency guards against circulation troubles. Heat transfer characteristics and dielectric properties of Coolanol 45 are excellent over its —65° to 400°F. temperature range.

Hydraulic Pumps and Coolanol 45: Eastern puts Coolanol 45 to double use—as a hydraulic fluid as well as a coolant. The higher pump speeds possible (up to 24,000 rpm) mean more efficiency, result in smaller units for any given job .. .and prolonged pump life is the result of the fluid's excellent lubricity.

EASTER .. . sustained supersonic speeds will call for advanced For deep forays into the thermal thicket — for problems in system redesign refrigeration-type cooling units or miniaturization — for imaginative solutions — turn to Eastern Industries. for temperature control within close limits. This system, which relies on Coolanol 45, protects *Coolanol: Monsanto Trademark. entire electronic systems. • FARTHER .. . miniaturized pump SMALLER . . . high operating LONGER . . long life and re- HOTTER . . this unit protects space and weight—extends mis- speeds of this Eastern hydraulic liability is typified in this East- electronic components of high sile range. This unit, an integral power unit (to 24,000 rpm) re- ern high pressure hydraulic performance aircraft from heat part of an APU system, helps sults in modest dimensions and pump. Reliable performance un- — delivers Monsanto Coolanol 45 provide hydraulic power to o weight: 73/4" x 2/12 " x 71/2", 4 der extreme environmental con- coolant at 1.3 gpm flow rate cruise missile. pounds, 12 ounces. "slitions is an Eastern tradition. and 60 psi pressure.

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COOLER ... much cooler elec- MORE .. . much more informa- tronic equipment, and new per- tion on these and other acces- formance concepts — this is the sories and systems is contained EASTERN INDUSTRIES, INC. promise of Coolanol 45. For the in this new complete brochure. 100 Skiff Street characteristics and applications It contains latest developme,ds of this new Monsanto product, in hydraulic power, cooling and Hamden 14, Conn. write for Monsanto Technical pressurization. Send for your Bulletin Number AV-3. free copy of Bulletin 360 today. IIILE Multi-channel—telegraph Al or telephone A3 TAB LIE High stability (.003%) under normal operating conditions

L_N Components conservatively rated. Completely tropicalized

Here's the ideal general-purpose high frequency transmitter! Model 446, suita ale for point-to-point or ground- to-air communication. Can be remotely located from operating position. Coa :jai fittings to accept frequency shift signals. This transmitter o erates on 4 crystal-controlled frequencies (plus 2 closely spaced frequencies) in the band 2.5-24.0 Mcs (1.6-2.5 Mes available). Operates on one frequency at atime; channeling time 2seconds. Carrier power 350 wats, Al or A3. Stability .003%. Nominal 220 volt, 50/0 cycle supply. Conservatively rated, sturdily constructed. Complete technical data on request. Now! Complete-package, 192 channel, H.F., 75 lb. airborne communicatiéns equipment by Aer-O-Com! Write us today for det Lils!

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-4-CIRCLE 7 READERS SERVICE CARD CIRCLE 8 READERS SERVICE CARD bruary 13, 1959 — ELECTRONICS BUSINESS THIS WEEK

ELECTRONICS NEWSLETTER

NUCLEAR THERMIONIC CONVERTER has pro- EAGLE, Navy's long-range air-to-air fleet air de- duced electricity under gamma radiation condi- fense and intercept missile, will use "new secret tions from a radioisotope in an eight-day experi- guidance devices." Sanders Associates, Nashua, ment recently conducted by GE's atomic power N. H., says it will design and develop part of equipment department. GE says demonstration Eagle's guidance under subcontract to Bendix. showed the system has the potential to produce an extremely high ratio of power to weight for Soviet scientists are reportedly experimenting with space vehicle auxiliary power use. Experiment electronic controls to boost cotton production. simulated space conditions such as vacuum, tem- These include an automatic seed separator and a peratures from 800 F to 1,700 F, and gamma remotely controlled cotton picker. radiation. Gold strip was used as radioisotope. Firm says multihundred watt radioisotope thermionic converter could be developed in one to TRANSISTORIZED COMPUTER for both business two years; for higher ranges, where small reac- and scientific use features automatically con- tors might be substituted for radioisotopes as trolled parallel processing of up to eight different heat sources, GE adds, suitable systems could be jobs at once. Manufacturer, Minneapolis-Honey- developed in three to five years. well Regulator Co., making a bid for share of the medium-sized computer market, said such a unit Ultrasonic gage that simplifies measurement of thou- would rent for about $22,300 monthly, sell for sandths-of-an-inch variations in cylinder wall thick- about $950,000; minimum system rents for about ness is reported by General Motors for quality $11,000, sells for $500,000 to $600,000. control of automotive engine castings. ATRAN GUIDANCE built for USAF's surface-to- surface Mace missile has been used to fly a C-47 HIGH-POWER SEARCH RADAR on Boston Hill in over hundreds of miles of prescribed courses in Andover, Mass., is believed ready to play an im- West Germany. Radar from the missile guidance portant role in ballistic missile defense experi- system made by Goodyear Aircraft Corp. guided ments to be carried out by MIT's Lincoln Lab- the plane; its position was checked against a oratory. Reflector is 120 ft wide, 30 ft high; previously unused synthetic film of the terrain. rotatable antenna assembly weighs 50 tons. Ten- Firm says synthetic film can be made quickly foot klystron was developed for transmitter out- from existing topographical maps for desired put. Pulses lasting a few millionths of a second courses, permitting missiles or planes to be can be directed into space by antenna or, for test guided electronically. purposes, into dummy load. Special argon-filled tube protects highly sensitive receiver from pulse damage; gas ionizes when pulse strikes it and NEW CARD PROGRAMMED AUTOMATIC MILL installations show that the steel industry has prevents all but one-millionth of the energy from passing to receiver. accepted electronically controlled systems. That's the view of Westinghouse Electric's industrial control department. Firm reports that by the Materials which have thus far received little atten- end of 1958 four of its systems were controlling tion for thermoelectric device applications are now steel or aluminum rolling in reversing hot mills, under study at Battelle Memorial Institute. Two- and that three more installations are near, includ- year study is sponsored by 16 firms. ing one in Japan.

FLYING WEATHER LABORATORY described at NASA Administrator T. Keith Glennan says more Bendix Aviation symposium in Frankfurt, West than $200 million has already been committed to Germany, will soon test a variety of electronic the space vehicle systems that industry will be gear for USAF. Weather will be probed from asked to develop and build. 55,000 ft by (1) expendable dropsondes that transmit data back to the plane, a Boeing 707 jet transport, for recording, computing and relay to COUNTERBATTERY RADAR and computer sys- ground stations, and (2) by rockets that will rise tem is being considered for inclusion in Army nearly 10 miles before parachuting with their equipment requirements. Emerson Electric Mfg. instruments. Also, C and K band radar will Co. and Litton Industries say they are competing measure storm distance and clouds. All raw and as a team in a competition for such a system; processed data will go on magnetic tape for later Emerson Electric is working on radar and system ground computations. integration, Litton on computer design.

ELECTRONICS —February 13, 1959 11 Use your electronic counter as an ac urate digital voltmeter and integrator

VOLTE TE PREOUtlICT CO/111ER? ER »Ott tr..

10,000 10,000 CPS CPS New Dymec Voltage-to-Frequency Converter

DC INPUT, VOLTS Here is acompact new inst -ument which embodies atruly unique approach to the ana og-to-digital conversion DIRECT VOLTAGE TO FREQUENCY CONVERSION! problem. You can now mak accurate, dependable voltage measurements with your standard electronic counter, viewing results in direct, di ;ital form on the counter. The Multiple input ranges, either polarity instrument and its associat dcounter also serve as an electronic integrator permi ing direct measurement of Inherent noise-averaging characteristics the time integral of dc volts ;es and other variables without time-consuming manual da areduction and analysis. Output frequency 0 cps to 10 KC These characteristics make he DY-2210 an ideal basic component for data handli gsystems. 1megohm input impedence The new DY-2210 converte generates output pulses at a 0.1% accuracy rate proportional to the de *gnal voltage. This renders the instrument virtually insensitive to noise, and makes Easily used in remote and automatic possible average measurem ants of pulsating voltages and programming applications currents. The voltage meas ring interval is determined by the associated counter. Either positive or negative voltages can be measured without r versing leads or switching. Immediate shipment from tock. For complete details or demonstration see your D mec representative or write CONDENSED SPECIFICATIONS « direct for information.

Input Voltage Ranges: 0to 1, 10, 100 and 1,000 vdc; manual selection. Input Inpedance: 1megohm, 200 glif shunt, all ranges. Input Polarity: Positive or negative. Polarity automatically sensed. Output Frequency: Zero to 10,000 cps. Accuracy: Within 0.1% full scale. Calibration: Against internal mercury cell or external voltage standard. ED le NA EC INC. Power: 115 y ± 10%, 60 cps, 35 watts.

Dimensions: Cabinet model, 7v." wide, 11y4" high, 10 /14 "deep. Rack mount (formerly Dynac, Inc.) model, 19" wide, 3/14 " high, 10 /34 "deep. 5168E Page Mill Road • Palo Alto, Calif., U.S.A. Price: $650.00 (Rack) $660.00 (Cabinet). Data subject to change without notice. Prices f.o.b. factory. Avenport 6-1755

Fiéld repres ntatives in all principal areas See us at IRE. Booth 3019-3020.

12 CIRCLE 9 READERS SERVICE CARD CIRCLE 10 READERS SERVICE CARD—e. "

FAST! -up to 200 cps

SENSITIVE! -low as ±2.5 milliwatts

NEW CLARE Type MS Mercury-Wetted Contact Relay

IDEALLY SUITED TO HIGH SPEED SWITCHING DEVICES The Type HGS Relay is a new variety of CLARE Mercury-Wetted Contact Relay, developed to meet the needs of modern design engineers for faster and more sensitive relays. The HGS Relay is especially suited to all types of high-speed switching devices, over-voltage and overload protection devices and high-power chopper applications. Operating speeds may be up to 200 cps or more. Sensitivity may be as low as ±2.5 milliwatts for a bi-stable adjustment, as low as 5 milliwatts for a single-side-stable adjustment. Contact rating is 2amperes, 500 volts, with a limit of 100 volt-amperes. Supplements Clare H6 and HP Relays The new CLARE Type FIGS Relay will not supplant the revolutionary Types HG and HGP. •It will supplement these relays in applications which require higher speed or greater sensitivity.' Cutaway view of a CLARE The Clare Type HGS is similar to the Type HGS Relay. Mercury- Types HG and HGP except that the HGS is wetted contact switch is always biased with permanent magnets. sealed in glass and sur- rounded by the operating These are adjusted to single-side-stable or coil. Biasing magnets are bi-stable operation. attached to the upper ends of the side plates.

ELECTRICAL FEATURES MECHANICAL FEATURES

Long Life: Over one billion operations at rated load. Conveniences: Small, light-weight; plugs in like vacuum Operation Speed: Up to 200 cps with consistent per- tube; completely protected from atmospheric conditions; formance. Higher if some variation is tolerable. contacts cannot wear, weld, stick or chatter; tamper- proof; requires no maintenance. High Sensitivity: 5 milliwatts for single-side-stable adjustment; ±2.5 milliwatts for bi-stable adjustments. Durability: Easily withstands normal handling and trans- Stable Operation: 0.1 millisecond maximum operating portation shocks. time variation. Freedom from Chatter: Absolutely NO CONTACT Send for CLARE Sales Engineering Bulletin No. BOUNCE. 125 for complete information on the new Type HGS Low, Stable Contact Resistance: Initial contact re- Relay. Bulletins 120 and 122 describe HG and HGP sistance, 25 to 50 milliohms, does not vary by more than Relays. Write: C. P. Clare & Co., 3101 Pratt Blvd., Chicago 45, Illinois. In Canada: C. P. Clare 1or 2 milliohms during life of contacts. Canada Ltd., 2700 Jane Street, Toronto 15. Cable Low Ratio Coil Inductance: Low inductance-to-re- Address: CLARELAY. sistance ratio of coil suits relay well for transistor-drive applications. CLARE

RELAYS FIRST in the industrial field for. PRECISION MEASUREMENTS WASHINGTON OUTLOOK

from 50 to ELECTRONICS PRODUCERS can do nothing bit gain from the current hassle 10,500_ mcs over the Eisenhower defense budget. The Democrats will keep hammering t our alleged ICBM lag behind the Soviets. They'll be getting support f om some top Pentagon officials. Already, Roy Johnson, head of the Pentag en's Advanced Research Projects WEINSCHEL Agency, has said he could use at least 300 million more than the $445 million the president's budget allows hi n for next year. Similarly, the Air Force missile chief, Gen. Schriever, s 100% Square Wave lys he should have more money. MODULATED RF SOURCES Eisenhower isn't likely to change his o erall plan to hold down produc- Offer High Amplitude tion of the liquid-propelled first-generati n ICBM's—Convair's Atlas and and Martin's Titan. But the Democrats will rote more money for these and Frequency Stability other missile and space programs. Eisen ower then will probably expand his programs a notch or two.

At this moment, the ICBM program Ils for about 20 squadrons of Atlases and Titans—around 200 missiles in all. Rough guess on the cost of these (excluding R&D): About $2 billio . (The 1960 estimated spending is about $4 billion for all missiles.)

More Titans and Atlases may be prod iced, depending on how quickly the solid-fueled, second-generation missil —the Minuteman—comes along.

Model MS-6 • One area of electronic procuremen is shaping up very big in the Output Amplitude Independ- defense budget picture. That's s ending for electronic counter- ent of Load measures, early warning systems, intimissile missiles, decoy mis- Feedback circuit maintains con- siles to fool Soviet detection syste reconnaissance satellites, and stant incident power, allowing the like. use of full generator output without power consuming impedance Here's a run-down on what's inv lved in this area: masking. BMEWS—Ballistic Missile Ear Warning System—calls for Amplitude Stability gigantic radar stations in Alaska ald Greenland, at a total cost of After one •hour warm-up and some $800 million. A third statio —in Scotland—may be added without feedback circuit: ± 0.1 later. db/hr. With regulator and ex- Antimissile missile programs inc ude Army's Nike-Zeus and Air ternal directional coupler, the in- Force electronic R&D that's very s.cret. cident power will change less than 0.2 db for a change in load of Basic research for advanced ear y warning techniques is being from 25 to 150 ohms. With avolt- financed by ARPA. Again, it's hig ly secret lab research. age probe, the voltage variation is reduced by 10:1 by feed. Being planned is a satellite whos orbit would make it hang over back. one spot on earth. Its infrared equipment would detect and report ballistic missile launchings. Again, it's still on paper. Minimum Peak The Quail, a decoy missile to be aunched from a bomber distant Madi No. Frequency Power Output MCS (100% Sq. from an enemy target, would look like a bomber on enemy radar. Wave Modulated) ...e • First experimental stations of th military's multimillion dollar ,MS-1 50-250 80mw 250-920 200mw satellite detection system have st trted operating. The project— leiti 900.2000 100mw MS-4 2000-4200 60mW dubbed a Minitrack-Doploc fence—i aimed at detecting Soviet satel- M$-5 4000-7300 40MW lites that may be sent across t U.S. to ferret out military MS-6 7200-10,500 30mw information. Write for complete specifications. All three military services are rticipating in the project under the Pentagon's Advanced Research Projects Agency (ARPA). The Weinschel Fixed Coaxial Attenuators over the frequency range of DC to 12 KMC. Naval Research Laboratory has res onsibility for Minitrack stations e Write for complete catalog, on the east and west coasts. The Army's Ballistic Research Lab- 1110 specifying frequency oratory will set up Doploc station :—one is reportedly established range of interest. in Oklahoma; the Air Force's Ca bridge Research Center will be the computing and filtering center.

Weinschel Engineering Eventually there will be "several ' listening stations across the U. S. Details are highly classified. KENSINGTON, MARYLAND ARPA chief Roy Johnson, however, recently told a Congressional committee that construction of the listening posts was "essentially complete." CIRCLE 11 READERS SERVICE CARD

14 February 73, 7959 — ELECTRONICS Clevite offers new types with improved reliability TECHNICAL DATA and power handling capacity. Typical Electrical Characteristics at 25°C 2N1147 Series has solder lugs 2N1147 2N1147A 2N11476 2N1147C EIA REGISTERED TYPES WITH: 2N1146 Series has standard pins 2N1146 2N1146A 2N1146B 2NI146C • Improved seal for long life. Collector to Emitter Voltage Shorted Base (IC = 1amp) 30V 40V 60V 75V • Saturation voltage less than IVolt (Min) (Min) (Min) (Min) at increased maximum rated current of 15 amperes. Saturation Voltage 1.0V 1.0V 1.0V .1.0V (IC = 15 amps) (Max) (Max) (Max) (Max) • Average thermal resistance 0.7 QC per watt. DC Current Gain • Current gain controls: 60-150 at 5 amperes. (IC = 5amps) 60-150 60-150 60-150 60-150 • 100% test for resistance to transient burn out. DC Current Gain (IC = 15 amps) 35 35 35 35 • Either standard pins or solder lugs. Absolute Maximum Ratings C011ector.Current 15 amps 15 amps 15 amps 15 amps Collector to Base Voltage 40V 60V 80V 100V Collector to Emitter Voltage 40V 60V 80V 100V Power Dissipation at 70°C Case Temperature 25W 25W 25W 25W CLEVITE Junction Temperature 95°C 95°C .95°C 95°C A DIVISION OF OTHER CLEVITE DIVISIONS Cleveland Graphite Bronze Brush Instruments TRANSISTOR PRODUCTS CLEVITE Clevite Electronic Components • Clevite Harris Products 241 Crescent St.,WeItnam 54, Mass. TWinbrook 4-9330 [I Clevite Ltd • Clevite Ordnance • Clevite Research Center ibilla Intermetall G.m.b.H. • Texas Division

ELECTRONICS— February 13, 1959 CIRCLE 12 READERS SERVICE CARD 15 for the most efficient production of oxygen-free gas

look to Amersil for all high purity fused quartz aggip requirements.

NITRONEAL GAS GENERATOR ... provides by far the most economical and efficient method for the production of pure nitrogen —completely free of oxygen—and with hydrogen content precisely controlled at any desired percentage between 0.5% and 25%. Nitrogen Amersil manufactur sand fabricates high purity is supplied at a fraction of cylinder supply cost. fused quartz for ultr aviolet transmission applica- The Nitroneal Generator is automatic except tions, laboratory ware and production equip- for startup, with no need for operating person- ment. These products include standard apparatus, nel. The unit performs instantly, efficiently any- plain tubing in many intricate fabrications, cru- where in the range of from 25% to 100% of cibles, trays, cylindrical containers and piping rated capacity. Installation requires only a 110 in a full range of sizes up to 25" in diameter. volt line, water, air, ammonia lines and drain Ingots and plates are available in general com- facilities. Units can be supplied in capacities of mercial quality as well as in special optical 100 cfh to 10,000 cfh. •.. The catalyst lasts in- grades. Amersil engineers are also prepared to definitely—maintenance costs are practically nil. assist in developing fused quartz and silica equip- Write for complete catalog material and data. ment for special requirements. Send for bulletin.

CHEMICAL DIVISION • 113 ASTOR STREET AMERSIL QUARTZ DIVISION • 685 RAMSEY AVENUE NEWARK, N. J. HHILSIDE, N. J.

CIRCLE 100 READERS SERVICE CARD CIRCLE 101 READERS SERVICE CARD

Al1 ERSIL CHEMICAL QI ARTZ DIVISION WRITE FOR LITERATURE DI' !SION

DOMESTIC DIVISIONS) AMERICAN PLATINUM & SILVER DIVISION. AMERsiL DUARTE DIVISION. BAKER COIVTAcT DIVISION. BAKE DENTAL DIVISION. BAKER SETTING DIVISION. BAKER PLATINUM DIVISION CHEMICAL DIVISION. EAST NEWARK INDUSTRIAL CENTER, HANOVIA LAMP DIVISION, HANOVI LIQUID GOLD DIVISION. IRVINGTON-BAKER REFINING DIVISION, D. E. MAKEPEACE DIVISION. NATIONAL ELECTRIC INSTRUMENT DIVISION, RESEARCH AND DEVEL /PMENT DIVISION. H. A. WILSON DIVISION. COMPANIES ABROAD, ENGELFIARD INDUSTRIES OF CANADA, LTD. TORONTO. ENGELHARD INDUSTRIES OF QUEBEC, LTD. MONTREAL, ENGELHARD INDUSTRIES. LTD. LONDON. ENGELHARD INDUSTRIES A. G. ZURICH, ENGELHARD INDUSTRIES PTV.. LTD. MELBOURNE, SOCIEDAD SURAMERIC NA DE METALES PRECIOSOS S. A. BOGOTA. INDUSTRIE ENGELHARD S. P. A. ROME, ENGELHARD INDUSTRIES OF SOUTHERN AFRICA, LTD. JOHANNESBURG. ASSOCIATED OMPANIES: ACME TIMBER INDUSTRIES LTD.. SOUTH AFRICAN FOREST INVESTMENTS LTD., SOUTH AFRICA. AZOPLATE CORPORATION, CHARLES ENGELHARD, INC., NUCLEAR CORP. OF AMERICA, INC., U.S.A.

16 Fe ruary 13, 1959 — ELECTRONICS asimplified mirror-bright silver plating process

ECONOTAPE crossbar contacts are most efficient for electrical relays

You can now get ideally efficient crossbar contacts for your electrical relays—with as many contacts as you need, where you need them—with positive assurance of full, contact surface. This has been made possible through the development of Makepeace's new ECONOTAPE, a precision- drawn shaped or rectangular contact wire in either solid precious metal or in laminated metal —in your choice of gold, platinum, palladium, silver and their various alloys. Econotape crossbar contacts are supplied complete, attached to Makepeace blades .. . at- Here is the most efficient, simple procedure to tached to blades supplied by you... or Econotape protect electrical electronic and lamp compo- for your own attaching. nents with a mirror-bright silver finish—through a Econotape is cut off and welded to the blade complete range from flash to heavy deposit. The in one operation. It is no longer necessary to procedure is easy, economical and non-critical— handle and attach individual button type con- with little or no polishing required. Silva-Brite is tacts. Positioning of Econotape on the blade is a clear, water-white solution, enabling the oper- done automatically as the tape is cut off and ator to observe work as it is being plated. Uni- welded. Permanent attachment is assured by a formly good results are attained with current homogenous metallurgical bond that is undis- densities ranging from 10 to 40 amperes per turbed by expansion and contraction caused by square foot. Normal room temperature opera- temperature changes. tion minimizes fumes and tendency toward bath If you are designing a new relay or trying to decomposition. Send for descriptive data together cut the cost of your present mechanism, send for with detailed plating procedures. Econotape Crossbar Contact literature.

AMERICAN PLATINUM & SILVER DIVISION D. E. MAKEPEACE DIVISION • PINE & DUNHAM STREET 231 N. J. RAILROAD AVENUE, NEWARK, N. J. ATTLEBORO, MASS. CIRCLE 102 READERS SERVICE CARD CIRCLE 103 READERS SERVICE CARD

AMERICAN

PLATINUM

& SILVER

DIVISION

EXECUTIVE OFFICES:

113 ASTOR STREET • NEWARK 2. NEW JERSEY

ELECTRONICS — February 13, 1959 17 Perfect complement to your AMPEX system

•• your AMPEX Field Service Engineer

Ampex service begins the moment your new equipment Minutes after your call to the nearest of 12 offices or to comes out of the cases. Whether it is asingle FR-100A or the Ampex Home Off ce, extra parts or components are on a complete digital tape handling system, your Ampex their way. And this same close tie between factory and Service Engineer is there on installation day. Field Service keeps Ampex Service Engineers constantly

He sees to the proper installation of your equipment. He up-to-date on the latEst techniques and equipment. tests it with its original factory checkout tape and spe- Available are Field Service programs ranging from sched- cially designed calibration units. And he thoroughly uled preventive maintenance calls or time and materials instructs your staff in its operation. contracts, to the services of a full-time resident Ampex Throughout your warranty period—and afterwards— engineer. With your purchase, an Ampex data specialist Ampex Field Service is instantly available for modifica- will discuss aservice and spare-parts plan tailor-made to tions or fast replacements, avoiding costly down time. suit your magnetic tnpe instrumentation needs.

First in magnetic tape instrumentation AMPEX I4STRUMENTATION DIVISION 934 Charter Street, Redwood City, California Offices in USA and Canada. Engineering representatives cover the world.

CIRCLE 15 READERS SERVICE CARD FINANCIAL ROUNDUP

Firms Plan New Securities

NEW SECURITIES offerings by several ble subordinated debentures due electronics firms have been an- in 20 years. The company pro- nounced this month. In some issue poses to offer the bonds for sub- plans, stock offerings are aimed at scription by its common stockhold- employee purchase programs, ers. Basis will be $100 in bonds while others are intended for the for each 25 common shares. open market. •Avco Manufacturing Corp., •Royal McBee Corp., Port Cincinnati, plans to offer common Chester, N. Y., filed with the Se- stockholders subscription rights to curities and Exchange Commis- $15 million in convertible subord- sion on Jan. 6 a statement which inated debentures at the rate of seeks permission to register 94,726 $100 for each 64 shares of common why AMPEX shares of common stock to be of- stock. fered under its employee stock squares the option and savings plan. OVER THE COUNTER hysteresis loop •The following week, Electro - Voice, Inc., Buchanan, Mich., filed WEEK ENDING 1958 BIDS COMMON Jan. 23 Jan. 30 Ampex Instrumentation Tape in- a registration statement covering LOW HIGH STOCKS BID BID ASKED herits the same versatility and 33/4 20 1/2 Atoustica Assocs 20 20 34 2814 quality which make Ampex first 150,000 shares of its capital stock 1% 3 Advance Industries 31/2 344 4311 3% 6/34 Aerovox 6/12 75,8 9 in magnetic tape instrumentation. for contemplated offering this 201/2 33 Amer Res & Der 37/12 3744 40 Coercivity and retentivity are month. Half of the stock will be 163/4 24% AMP Inc 231/4 23/14 26/34 5/12 15 Appl'd Sci Princet 91/4 9 10/12 carefully balanced to square the sold publicly to augment the firm's 1% 83/e Avien, A 103/4 93/4 11% hysteresis loop for uniformly 6/34 24 Baird-Atomic 26 /34 251/4 287/e higher output over the entire fre- working capital, and half will be 93/4 13/34 BUM rly 14% 14 15% 6/34 9 Cohu Electronics 63/4 7/14 P/e quency spectrum. This optimized offered to present stockholders. 11 22V2 Collins Radio, A 25 1/4 23 273/4 B-H curve suits Ampex tape to 101/4 221/4 Collins Radio, El 25 1/4 23 28 A prospectus for the offering 4 7 Craig Systems 6% 7% 8% any recording mode: direct, FM- 30 50% Dictaphone 48 47 /12 51Ve carrier, PDM or NRZ-digital. states the stock earned $1.04 a 17% 25 /34 Eastern Industries 201/2 20 1/4 22/34 share for the firm in the nine- 10% 21 Electra Instr 26 1/4 241/4 28/34 The exclusive Ferro-Sheen proc- 34 49 Electronic Assocs 51 48 55 ess makes Ampex the smoothest month period ended Nov. 30 last 5 11 Electronic Res'rch 1214t 12 13% 81/2 123/4 Electronic Spec Co 14/12 13 15 of magnetic tapes. Improved head year. 151/4 4942 Fine°, Inc 41 40% 48/34 contact means consistently high- 5% 9/34 Erie Resistor 10% 101h 12 er output and less noise from the 10 17 /12 Fischer & Porter 16 151h 17% •Perkin-Elmer Corp., Norwalk, 3644 50 Foxboro 49% 49 53% very first run, unlike other tapes 5% 10% 6-1 Electronics 11 /14 13% 15% which get "hotter" as they wear Conn., registered with SEC to of- 12 27 Giannini 31 28 33% smooth. 30 39% Hewlett-Packard 42/34 oh 45/34 fer 20,000 shares of common stock 23/14 48 High Voltage Eng 57 54 62 Smoothness means uniformity of 1% 3 Hycon Mfg 33/e 3% 331 output, too, within a range of to employees pursuant to its em- 1/12 5% Industro Trans'tor 23/4 2/34 3/34 0.25 db on each reel for low fre- ployee stock purchase plan of 1959. Ph 4% Jerrold 4/12 43/4 5/34 21 30 D. S. Kennedy 333/4 32/12 41% quencies, a 1.5 db range for the P-E also plans to offer 49,875 com- 33/4 29 Lab For Ellronics 233/4 253/4 28% 191/4 28 Leeds 8 Northrup 29/12 30% 33/12 highs. And regardless of base mon shares in its restricted stock 2 3% Leetronics 2 2 25:8 type or thickness, Ampex tapes 5 183/4 Ling Electronics 103/4 18 /12 20 are interchangeable without option plan for key employees. 16 20% Machlett Labs 21% 24% 2944 3/14 81/4 Magnetic Amplifiers 8 73/4 8/34 equalization or bias adjustment. 27/8 4% Magnetics, Inc 3% 33/e 4 Ampex Instrumentation and Gen- •A private stock transaction 4% 12 W. L. Maxson 13% 13% 15 313 10/34 29 Microwave Assocs 34 33% 3734 eral-Purpose Tapes are available plan for future expansion has 51/4 11/34 Midwestern Instr 13/14 127/8 14 1/4 on hubs, NAB-type or die-cast 1% 7 Monogram Precis'n W4 8-/34 91/4 magnesium-alloy Precision Reels. been announced by Magnetic Re- 3% 7/14 Harda Microwave 61/2 7/12 8% 1 1" 9/34 16 National Company 18/14 18% 21 3/4 Widths of 4,% and are stand- search Corp., Hawthorne, Calif., 14 1/4 56 Nuclear Chicago 30/12 28/12 33 ard on either Mylar* or acetate 14% 293/4 Orradio Industries 283/4 29 32% base, in the following lengths, reel manufacturer of specialized mag- 4% 73/e Pacific Mercury, A 91/4 9/12 107/e netic components and magnetic 10 /14 27 /12 Packard-Bell 301/2 31 36/12 diameters, and base thicknesses: 41/4 9/34 Panellit, Inc 6/34 67/te 7/14 systems. The New York firm of 21 533/4 Perkin-Elmer 523/4 47 54/34 11% 191/2 Radiation, A 17 /34 18 22 AMPEX STANDARD TAPE LENGTHS (feet) J. Barth & Co., New York Stock 2% 73/e Reeves Soundcraft 77/e 7% 8% 13 32/12 Sanders Associates 33 32 35% REEL BASE THICKNESS (mills) Exchange investment brokers, has 7 12 SoundScriber 15 18 21 DIAMETER 1.0 1.5 223/4 40 Sprague Electric 41 /34 41% 457/e purchased 2,500 shares of pre- 26 35 Taylor Instruments 341/2 33 3634 7' 1800 1250 5/12 15 Technical Operarns 16 1/4 16/34 19/34 ferred stock and 24,250 shares of IOW' 3600 2500 5% 15 3/4 Telechrome Mfg 16 18 21% common stock. MRC statement says 3/14 7/34 Telecomputing 8/12 8/12 9 14" 7200 5000 1% 23/4 Tel-Instrument 2/34 2/34 3% * DUPONT TRADEMARK total consideration for the trans- 8/34 16 1/4 Tapp Industries 14% 141/4 16% 33/4 10/34 Tracerlah 12/14 11 1/4 13% For complete specifications or action exceeds $1 million. 1% 3/34 Universal Trans'tor 2% I vie 141/4 40 Varian Associates 50 42 53 additional tape literature, write 12/12 18/12 Vitro Corp. Amer 16 1/4 16% 187/e •Smith-Corona Marchant Inc., The above "bid" and "asked" prices prepared by the NATIONAL ASSOCIATION of SECURITIES AMPEX owner of Kleinschmidt Laborator- DEALERS. INC., do not represent actual trans. MAGNETIC TAPE ies, Deerfield, Ill., has filed regis- actions. They are a guide to the range within which these securities could have been 934 CHARTER STREET, REDWOOD CITY, CALIF. tration of $7,443,100 of converti- sold (che "BID" price) or bought (the "ASKED" price) during preceding week. CIRCLE 1F. READERS SERVICE CARD ELECTRONICS — February 13, 7959 19 KEITHLEY MODEL 150 MICRO VOLT-AMMETER

MEASURES

teitiley *die 150 micro volt -ammeter DOWN TO 0.03/e

AND 2 x 10 -1,2 AMPERE

ampere per day as an ammeter; short term noise withi 1 0.03 microvolt peak to peak (0.006 microvolt RMS). The 150 is rugged, relatively insensitive to vibration, 60-cycle The Keithley 150 sets new standards in sensi- fields, or diermal EM F's. It is available in tivity, stability and noise figure for dc micro- either rack or cabinet packaging. voltmeters. It also serves as an amplifier, null USES of tie 150 encompass nearly every detector, micro-microammeter, and (with an branch of r'search and engineering. Examples external voltage supply) meg-megohmmeter. include measuring the outputs from strain Functions and measurement spans include: gages, the'rmopiles, thermocouples, bolo-

DC Voltmeter, 1 microvolt to 1 volt full scale meters, phototubes, ionization chambers,

Ammeter, 10 - 10 to 10 - 3 ampere full scale scintillatior counters, and barrier layer cells. DC Amplifier, gains of 10 to 10,000,000 Other appl ications are found in cell studies, Null Detector, with 0.5 to 2 second period. electrocheniiical potentials, corrosion work, moleculaHveight analysis, Hall effect studies. OTHER FEATURES of the 150 include zero suppression of up to 100 times full scale; optional DETAILED DATA about the 150 Micro Volt- floating or grounded input; high input resist- ammeter ire now available in Keithley ance; zero stability as a voltmeter within Engineering Notes, Vol. 7 No 1. A request ± 0.1 microvolt per day, and within ±2 x 10 -11 will bring ,our copy promptly.

BRIEF SPECIFICATIONS de voltage: 13 ranges in IX and 3X steps from +1 microvolt to +1 volt full scale. current: 17 ranges in IX and 3X steps from ± 10-10 to +10 -3 ampere full scale. zero stability: within 0.1 microvolt per day, or 2x 10- 11 ampere per day. noise: less than 0.006 microvolt RMS as a volt- 4 1 hour meter; less than 2x 10 -12 ampere as an ammeter. Long-term drift of the Model 150 is shown in the above recording. A 1000-ohm accuracy:voltage, + 2% of full scale on all ranges ; resistance was connected across th input. Note the very low peak to peak current, +3% on all ranges. noise, even at this slow paper spee zero suppression: up to 100 times full scale. response speed: 0.5 to 2seconds. gain: 10,000,000 maximum. KEITHLEY INSTRUMENTS, INC. output +10 vand 5ma for full scale deflections. 12415 EUCLID A‘IfENUE CLEVELAND 6, OHIO price: $675.00

20 CIRCLE 17 READERS SERVICE CARD February 13, 1959 —ELECTRONICS s —.---1-1" 1 SNAP IN CLIP IN

THE NEW PRINTED CIRCUIT EDGE CONNECTOR

This A-MP unit is more than new—it is the only solderless, direct-contact connector on the market. Designed for both commercial and military requirements, it means faster assembly, greater reliability and versatility to you—at lower cost! You get construction of unmatched close tolerances in both the contact and the one-piece molded housing. And—because each contact is wholly enclosed within its own housing barriers, there's no need for post insulation. Contacts feature spring-lock design which assures positive contact with board—yet will not cause damage to board paths, even after repeated insertions. Assembly is easy: An A-MP high speed machine crimps contacts to circuit wires. Contacts are quickly and completely snapped into housing, locked in place with a lance to eliminate damage from shorts, bending or strain. The printed circuit board is then inserted for unlimited circuit combinations.

Snap in .. . clip in—it's that simple to save time, money and increase quality.

Send for full product Information today,'

AMP INcoRo1P GENERAL OFFICES: HARRISBURG, PENNSYLVANIA A-MP products and engineering assistance are available through subsidiary companies in: Canada • England • France • Holland • Japan'

ELECTRONICS — February 13, 1959 CIRCLE 18 READERS SERVICE CARD 21 Capable of reception at speeds of 750 words minute, new Kleinschmidt unit is world's fastest message printer and code puncher

A major breakthrough in mechanical printing! De- transmission of telegrams, stock market quota- veloped in cooperation with the U.S. Army Signal tions, and weather rep3rts. It has important appli- Corps, this new super-speed teletypewriter is ten cations in the field of integrated data processing. times faster than "standard" equipment, five times In recognition of its qPaality, Kleinschmidt equip- faster than normal conversation. In future comment is manufactured for the U.S. Army under mercial use it could speed operations such as the the Reduced Inspecticn Quality Assurance Plan. KLEINSC !MDT DIVISION OF SMITH-CORONA MARCHANT INC., DEERFIELD, ILLINOIS Pioneer in teleprinted communications systems and eg luipment since 1911

22 CIRCLE 19 READERS SERVICE CARD bruary 13, 1959 — ELECTRONICS VITREOUS-ENAMELED RESISTORS Tremendous variety METAL FILM RESISTORS Riteohm® metal film preci- of types and sizes. Fixed, adjustable, tapped, noninduc- sion resistors feature full 1/4-watt rating at 150°C am- tive, thin, and precision resistors available in a wide bient; excellent high frequency characteristics; low range of wattages and resistances. Also available to meet temperature coefficient of resistance. Long-term load MIL-R-26C requirements. and shelf stability.

TE ® INDUSTRY'S MOST COMPLETE LINE OF QUALITY WIRE-WOUND RESISTORS

V**,figeilegeveeieee

POWER RESISTORS Power-type resistors for high-cur- MOLDED PRECISION WIRE-WOUND POWER RESISTORS rent, low-resistance applications. Vitreous-enameled, Insulated units with Silicone-Type molded covering. edge-wound, corrugated ribbon Corrityi', units and Available in 3-, 5-, and 10-watt sizes. Tolerances: 0.1%, open-type, edge-wound ribbon or round-wire Powr-Rib» 0.25%, 0.5e;,, 1%, and 3%. Maximum resistance: units handle a wide range of power resistor needs. 3-watt, 10,000 ohms; 5-watt, 25,000 ohms; 10-watt, Available in fixed or adjustable "DIVIDOH M" types. 50,000 ohms.

OHMITE HAS EXACTLY THE RESISTOR YOU NEED NONINDUCTIVE SPECIAL VARIETIES Ohmite offers the most complete line of high quality Tubular vitreous-enam- Ohmite can provide tor- resistors on the market .. . fixed, adjustable, tapped, eled resistors with special oids, flat strips, plaques, noninductive, and precision resistors in many sizes and winding. Dummy antennas special-sized tubes, or tubes types of terminals .. . in a wide range of wattages and consist of assemblies of with mixed terminals, etc. resistances. All-welded construction. Ohmite applica- several resistors. Watts, 5 Watt ratings and resist- tion engineers will be pleased to help you in selecting to 1000; ohms, 1to 5000. ances available as required. the resistors for your job. Write on company letterhead for Catalog 58.

014MITE°Manufacturing Company 3610 Howard Street Skokie, Illinois QUALITY COMPONENTS 1 RHEOSTATS RESISTORS RELAYS TAP SWITCHES TANTALUM CAPACITORS R. F. CHOKES VARIABLE TRANSFORMERS DIODES

ELECTRONICS —February 73, 1959 CIRCLE 20 READERS SERVICE CARD 23 MARKET RESEARCH Test Chamber Gear Sales Up

ENVIRONMENTAL TEST EQUIPMENT stems, other on components and sales are expected to benefit from e uipment. Plans are to build corn- today's drive to conquer space. Such ecial sales by adding to sales of equipment pretests electronic and ol I products; by developing new other equipment by exposing it to o es; through acquisition of some environmental conditions it will en- fi s and through arrangements counter in use. Present annual sales to market products made by other are roughly about $10 to $20 mil- rn nufacturers. lion, says Monroe Seligman, president of Tenney Engineering, one Consolidated Electrodynamics of the largest manufacturers in Co p. institutes price increases av- the field. er ging five percent on standard Annual sales are expected to linjes of data-processing, magnetic reach somewhere between $50 and ta e, transducer, analytical and $100 million in the next five years. co ttrol and high vacuum equip- Cost of electronic gear used with met. enviromental test chambers is believed to presently average 10 per- Baldwin - Lima - Hamilton's cent; range is from five to 20 per- El ctronics & Instrumentation Di- cent. Percentage of electronic vis ion announces that national dis- equipment is on the way up. tri )ution of its SR-4R strain gages will be transferred from local cor- •Bankers have cleared the decks potation sales offices to industrial for sale of electronic check-sorting sal )s representatives. Move was equipment to nation's 14,000 com- ma le to obtain better overall na- mercial banks. Committee of the tio al sales coverage and give The Westinghouse hermetically American Bankers Association has bet:er service to customers. Un- sealed, Polyclad Hipermag core is the newest development in cores for made the final decision needed for usu al feature of the new distribu- magnetic amplifier applications. establishment of a compatible tio plan is that each of the reps Applied over a new specially de- magnetic character check-sorting sel cted will maintain a complete signed aluminum box housing the system. Bankers are expected to sto k of standard strain gages in core, Polyclad insulation hermeti- buy about $200 million of elec- at ast one location in his terri- cally seals the core and allows en- tronic sorting equipment in com- tor , company claims. capsulating, casting or impregnating ing years. without altering magnetic proper- Manufacturers will deliver some • Bureau of the Census, U.S. ties. This special core: sorting equipment this year, a lot Department of Commerce, starts Stops magnetic amplifier rejects • next year. Computer and other mai ing its questionnaires for its caused by changed magnetic values. electronic equipment sales are Cen • Is suitable for all environmental uses of Manufactures, Min- conditions — high temperatures, also expected to increase. Some eral Industries and Business. Last humidity and high-voltage stress. estimate commercial bank market simlar Census Dept. enumeration • Eliminates costly core taping. for all electronic equipment in was conducted in 1955 when the e Is tested by Roberts constant-cur- next 10 years at $1 billion. Most cen sus covered 1954 activities. rent, flux reset technique, or to your of the well-known manufacturers Ele tronic processing equipment specification. of electronic office equipment have will be used to process results. Available in production lots with been working with banks on prob- Prel minary reports will be released normal delivery, these cores are lem of developing sorting and re- in t e fall and winter of this year. supplied in special sizes or in stand- lated equipment for number of ard AIEE sizes. years. However, because produc- For more information about these or other Hipermag or Hipersil® tion until recently has been lien- FIG RES OF THE WEEK cores, call your Westinghouse repre- ited to prototypes, there may still sentative .. . or write Westinghouse be considerable opportunities for LATEST WEEKLY PRODUCTION FIGURES Jan. 23, Dec. 26, Change From Electric Corporation, P.O. Box 231, component and sub-assembly man- (Sourc :EIM 1959 1958 One Year Ago Greenville, Pennsylvania. .1-7osss ufacturers. Televisi sets 112,762 55,804 +9.0% Radio sits (ex. auto) 293,721 206,932 +26.1% Auto se s 108,359 88,112 .4-35.4% YOU CAN BE SURE—IF 17' • Raytheon is aiming for a big expansion of its commercial prod- STOCH PRICE AVERAGES Jan. 28, Dec. 30, (Standa d & Poor's) Change From Westinghouse ucts business. Commercial prod- 1959 1958 One Year Ago ucts division has been split into Electronics mfrs. 73.04 74.37 +34.1% WATCH "WESTINGHOUSE LUCILLE TALC-SCSI ARNAZ SHOWS' . Radio & to mfrs. 79.08 81.07 +71.4% CBS TV MONDAYS two parts: one concentrating on Broadcai ters 81.24 79.88 +37.5% CIRCLE 21 READERS SERVICE CARD 24 Feb uary 13, 1959 — ELECTRONICS ....•••••""" 00 CD (5) CD CD

•;¡.•••••"'

*.*.*.2•••'*e.;

Missile Guidance—Body English

Contortions of the human body have not, as yet, TONOTRON * storage tubes, and High Frequency proven themselves acceptable means for overcom- Crystal Filters. ing component failures in missile guidance sys- In addition to these, other Hughes Products tems. While you may be able to "will" a golf ball devices which provide you with this "built-in" into a cup, no one has ever "willed" a missile back reliability include: Special-purpose oscilloscopes on course. We at Hughes Products feel that missile ...Rotary Switches...Thermal Relays...mEmomoN®

component reliability can take a more scientific and TYPOTRON R display storage tubes...Diodes, form. The tight quality control procedures at Transistors and Rectifiers with uniform perform- Hughes Products insure you component reliability ance...and Industrial Systems which automate a that can be counted upon, even under the most complete and integrated line of machine tools. severe environmental conditions. *Trademark of H.A.C. For additional information regarding any com- On the following three pages you will find ponent or system please write: Hughes Prod- specific examples of reliable Hughes Products ucts, Marketing Dept.. International Airport components—Gold Bonded Germanium Diodes, Station, Los Angeles 45, California.

Creating anew world with ELECTRONICS HUGHES PRODUCTS

01959. HUGHES AIRCRAFT COMPANY

SEMICONDUCTOR DEVICES • STORAGE AND MICROWAVE TUBES • CRYSTAL FILTERS • OSCILLOSCOPES • RELAYS • SWITCHES • INDUSTRIAL CONTROL SYSTEMS

ELECTRONICS — February 13, 1959 CIRCLE 22 READERS SERVICE CARD 25 r-. Y.• •

sever' shades of gray

with the Hughes TONOTRON * StOrage Tube

Able to present as many as seven shades of gray, the Hughes TONOTRON* cathode-ray storage tube now provides ,you with high- fidelity picture reproduction.

In addition, the Hughes TONOTRON * tube features high picture brightness (in excess of 1500 foot lamberts with full half-tone range) and controllable persistence.

Other Hughes electron tubes include the MEMOTRON I storage tube, the TYPOTRONR, storage tube, and a family of microwave tubes. With a wid variety of reliable tubes designed to meet your strictest requirements, Hughes continues to maintain leadership in the field of storage and microwave tubes.

Collins Airborne Weather Radar System WP-131 incorporates the Hughes Type 7033

Magnetic Deflection TONOTRON * tube. This system provides the pilot with a continuous high-fidelity picture of weather conditions within a radius of 150 miles. Ground mapping — a secondary function— shows the location of cities, lakes, rivers, mountains, and shoreli les, and dangerous obstacles. Even in direct sunlight, no viewing hood is required.

Typical installation in acomrn -erCiataaTiiraft. Foradditional information regarding any of the Hughes el rtron tubes please write: Hughes Products,

Marketing Dept.—ELECTRON TUBES, International Airport Station, Los Angeles 45, California. * TRADE-MARK OF H A.0

Creating a new world with ELECTRONICS HUGHES PRODUCTS

01959. HUGHES AIRCRAFT COM 'ANY

SEMICONDUCTOR DEVICES • STORAGE AND MICROWAVE TUBES • CRYSTAL FILTERS • OSCILLOSCOPES • RELAYS • WITCHES • INDUSTRIAL CONTROL SYSTEMS

CIRCLE 23 READERS SERVICE CARD 26 ebruary 13, 1959 — ELECTRONICS precision performance levels set by Hughes Crystal Filters

Hughes Products now offers high performance crystal filters SPECIFIC PERFORMANCE CHARACTERISTICS FOR TYPICAL FILTERS previously available only for special military developmental Filter No. 1 Filter No. 2 Filter No. 3 60/6 db Bandwidth 50/6 db Bandwidth 60/6 db Bandwidth contracts and Hughes-built systems. Utilizing unique design Ratio = 1.8 Ratio = 2.0 Ratio = 1.37 and advanced manufacturing techniques, these Hughes crys- 00 tal filters provide a degree of performance previously un-

attainable. [I

With center frequencies of 30 kc to 30 mc and fractional anal bandwidths of 0.01% to 6%, these crystal filters have seven 111.11 distinct advantages:

.11111111 I. High frequency filtering oe -4 0 4.2 -.4 06 -oo o +4o •ao •-2 -I 0' rz

2. High selectivity DEVIATION FROM CENTER FREQUENCY (km) 3. Low passband ripple No. I No. 2 No. 3 4. Low insertion loss Center Frequency 1.75 mc 10 mc 1.75 mc 5. Small size and weight 6db Bandwidth 6 kc 70 kc 2.7 kc Maximum Insertion Loss 6db <2 db 6db 6. Excellent temperature stability Maximum Passband Ripple 1db <0.25 db .1. 1db 7. Excellent shock and vibration stability Stopband Attenuation > 60 db > 50 db > 60 db

For further information please write HUGHES monucrs, Crystal Filters, International Airport Station, Los Angeles 45, Calif

— 1

Creating a new world with ELECTRONIC'S ; HUGHES PRODUCTS

01959. HUGHES AIRCRAFT COMPANY

SEMICONDUCTOR DEVICES • STORAGE AND MICROWAVE TUBES • CRYSTAL FILTERS • OSCILLOSCOPES • RELAYS • SWITCHES • INDUSTRIAL CONTROL SYSTEMS

ELECTRONICS— February 13, 1959 CIRCLE 24 READERS SERVICE CARD 27 -\ 1.47,1D

HUGHES GERMANIUM DIODES first of all for reliability.

Hughes gold bonded diode exhibit fast recovery together with Typical performance levels: @ 25°C. unless otherwise stated Forward Current Inverse Current Maximum Inverse high forward conductance, low reverse leakage and high peak +1V Specified Voltage (mA min.) Voltage (Volts) inverse voltage. They are f sion sealed in asubminiature one- (mA max.) piece glass envelope. This ssures you complete isolation from 1N270 200 100 é —50V 100 1N276 40 100 (4) —50V 60 damage or contamination. 1004 —10V* 1N277 100 250 —50V* 125 Under varied and severe nvironmental and operating condi- 75 —10V* *Measured tg 75°C. tions, Hughes Gold Bonded diodes exhibit outstanding perf orm- ance. You can be assured o reliable performance, since Hughes For additional information write: Hughes Products, diodes exhibit the followin characteristics: shock resistance... Marketing Dept.—Semiconductors, International Airport Station, Los Angeles 45, California. vibration resistance ... ther sal stability... electrical stability.

Creating a new world with ELECTRONICS HUGHES PRODUCTS

01050. HUGHES AIRCRAFT CO PANT

SEMICONDUCTOR DEVICES • STORAGE AND MICROWAVE TUBES • CRYSTAL FILTERS • OSCILLOSCOPES • RELAYS. SWITCHES • INDUSTRIAL CONTROL SYSTEMS

28 CIRCLE 25 READERS SERVICE CARD February 13, 1959 — ELECTRONICS Which of these 39 cities is your next stop?

SHERATON EAST NEW YORK BOSTON WASHINGTON PITTSBURGH BALTIMORE PHILADELPHIA PROVIDENCE ATLANTIC CITY SPRINGFIELD, Mast. ALBANY ROCHESTER BUFFALO SYRACUSE BINGHAMTON, N.Y. (opens early 1959)

MIDWEST CHICAGO DETROIT CLEVELAND CINCINNATI ST. LOUIS OMAHA AKRON INDIANAPOLIS FRENCH LICK, Ind. RAPID CITY, S. D. SIOUX CITY, Iowa SIOUX FALLS, S. D. CEDAR RAPIDS, Iowa

SOUTH LOUISVILLE DALLAS (opens early 1959) AUSTIN MOBILE

WEST COAST SAN FRANCISCO LOS ANGELES PASADENA PORTLAND, Oregon (opens fall 1959)

CANADA MONTREAL TORONTO NIAGARA FALLS, Ont. HAMILTON, Ont.

... Sheraton's A call to the nearest Sheraton Hotel sets in motion the world's fastest hotel reservation service. RESERVATRON RESERVATRON got new electronic marvel, reserves and confirms your room in him his hotel reservation any Sheraton Hotel coast to coast in split seconds! For hotel reservations for your next trip, just phone Sheraton. in just 4seconds! Let RESERVATRON take it from there.

FREE BOOKLET to help you plan 1•111 trips, sales and business meetings, Sheraton Hotels, Dept. 21, 470 Atlantic Ave., Boston 10, Mass. conventions. 96 pages, describing Sheraton facilities in 39 major cities. Please send me, without obligation: Li Sheraton facilities booklet MEMBERSHIP APPLICATION for the ü Membership application for the Sheraton Hotel Division of the Diners' Club Sheraton Hotel Division of the DINERS' CLUB. This card is an Name invaluable convenience for the traveler — honored for all Sheraton Address Hotel services. City Zone State Just send us this coupon— ••11

ELECTRONICS — February 13, 1959 CIRCLE 26 READERS SERVICE CARD 29 Over $900 million is earmarked for B-52 bomber (left) and KC-135 Stratotanker in fiscal year 1960 SAC Prepares for Missiles

Electronics industry gets at least 25 percent of the $2 billion spent an- nually on Air Force ballistic missiles for Strategic Air Command

OFFUTT AFB, NEB.—Judgments SAC's missile force with manned get $322 million in new money in and decisions made here today at planes. fiscal 1960. SAC planning calls for the Strategic Air Command head- one tanker for every two B-52's. quarters result in tomorrow's needs Planes Always Flying •Seven B-58's are now flying. from the electronics industry. Controlled and directed by its Although still undergoing tests by On-the-spot talks with top brass underground headquarters here as ARDC, they are also training SAC here at the brain and nerve center tightly as a single infantry squad, crews. On order: 66 more. of one of the most complex and effi- the Command currently consists of •B-70 Valkyrie, Mach 3 long- ciently run operations in the about 2,100 bombers and 900 tank- range bomber that will carry an world, indicate there'll be increased ers and support planes, operating airlaunched ballistic missile, will buying of existing, as well as from 70 bases scattered over four get $355 million in fiscal 1960 for brand new, electronic devices in continents. Approximately 211 continued development. Martin and fiscal year 1960. planes are flying training missions a Lockheed-Convair team are said SAC's current projects—all of at any given moment, day and to be working on the missile. which involve heavy electronic buy- night. About a third of the striking—include: ing force is constantly on runway Business Better • Building up inventory of exist- alert, set to fly in 15 minutes. Though new figures are not avail- ing aircraft models. Manned aircraft striking force able, bomb-nay systems for SAC's •R&D on future aircraft—the consists of: B-47, B-52, B-58 and B-70 passed B-70. •28 wings of B-47's containing the $1-billion mark a year ago •Retrofitting operational B-47's, 45 planes each. Though no new (E LECTRONICS, p 15, Feb. 21, 1958). B-52's and tankers with new elec- planes are due, those already op- This business is even better now. tronic gear. erational are constantly being up- •KC-97 tankers, now out of pro- • Continued dispersal of bases dated with new electronic gear. duction, total 888 operational (to avoid concentration of planes •B-52 force consists of six wings planes. They are still being and to provide more runways for si- of 45 planes each. Four more wings equipped with new electronic gear. multaneous take-off). This will re- will be operational by July. New SAC missiles: Though the first quire additional electronic test, 1960 fiscal money provides $579 SAC operational missile site will checkout, communications gear. million for new B-52's. Hound not be ready until July, SAC per- •Improvement of world-wide Dog, air-to-surface, inertially sonnel have been receiving mainte- communication systems (single guided supersonic missile to be nance and operation training by sideband will be operational in all launched from the B-52G, will be manufacturers and military units SAC planes by June, 1960, operat- operational in 1960. First guidance for the past 15 months. SAC's mis- ing in connection with four new system was delivered by Autonetics sile strength now consists of 12 ground-to-air otations). to North American's missile div. training wings and/or squadrons •Acquisition of a new electronic last month. Both the B-47 and B-52 in the U. S. and United Kingdom. combat control system—a stepped- can carry the air-launched Quail, •ICCM Snark (Intercontinental up communications, computer and short range decoy missile giving a Cruise Missile), nearsonic pilotless display complex. bomber-like return on enemy radar. aircraft, will be operational at •Preparation for blending in •KC-135 jet Stratotankers will Presque Isle, Me., in July. Current

30 February 13, 1959—ELECTRONICS $50-million contract with Northrop covers production of the missile through December, 1960. •IRBM's: Five Thor squadrons have been authorized, four to go to England and one still uninvited. Four Jupiters are authorized, though to date there have been no European takers. Possibilities are Italy, Greece, Turkey, France. •ICBM Atlas: Nine sites are authorized. First two are now under construction at Vandenberg AFB, Calif., and at Warren AFB, Wyo. The third and fourth, to begin this year, will be here and at Fairchild MIL-T-27A MIL-T-21038 AFB, Wash. Though to what extent the Atlas missile program is being specifications with accelerated is not disclosed, Presi- dent Eisenhower says Atlas will be TRANSISTOR TRANSFORMERS by operational by June 30. Last month, GE received three contracts available from stock for radio-command guidance sys- TRANSISTORIZED BLOCKING tems from Air Materiel Command OSCILLATOR CIRCUIT 410 totaling $110 million. MA X •ICBM Titan appropriations will be increased 50 percent in fiscal 1960. First site will be at Denver. TYPICAL NOMENCLATURE Three more are authorized. Request TT331-0.2 for seven additional sites, accord- PRI OCL IN MN ing to rumor, is in 1960 budget. TERT IARY RATIO 2 4 6 SECONDARY RATIO PSI •Solid propellant ICBM Minute- PRIMARY RATIO R E E man will get a $251-million boost in c R fiscal 1960. Minuteman has not yet TYPICAL UNITS AVAILABLE FROM STOCK been officially assigned to SAC. PULSE RISE PCA WIDTH PULSE TIME % Vcc TRIGGER TRANS. TRANS- USEC VOLTS USEC DROOP VOLTS VOLTS ISTOR FOR MER $2 Billion for Missiles .12 6 .04 30 -6 -1 2N240 11331-0.1 .22 3 .02 30 --; 6 -1 2N240 TT421-0.2 Cost per year for USAF ballistic .3 6 .06 20 -6 -1 2N240 TT331-0.2 .5 6 .05 25 -6 -1 2N240 TT221-0.5 missiles, according to Gen. Ben I. .6 6 .05 15 -6 -1 2N240 TT331-0.5 .9 6 .06 10 -6 -1 2N240 TT661-1 Funk, Commander, Ballistic Mis- 1.2 6 .04 20 -6 -1 2N240 TT331-1 1.5 6 .2 20 -6. -1 2N240 11221.1.5 siles Center, amounts to $2 billion 2.2 10 .09 50 -12 -1 2N247 11661.1 -at least $a billion for electronics. 12 5 .05 50 -12 -1 2N247 11521-6 13 2.5 .03 25 --6 -- I 2N240 17521.6 SAC's combined aircraft and mis- HUNDREDS OF OTHER TRANSFORMERS AVAILABLE FROM STOCK sile striking force will present a formidable picture to a potential 1. All abovedata with R= -O 2. Insertion of feedback RE narrows pulse width to circuit needs. aggressor: B-47's approaching at 3. The transformer dash number approximates Pw. 40,000 ft, releasing diversionary 4. Free run PRF can be controlled by .D.Va on base. Quails; B-52's at 50,000 ft, launching air-to-ground Hound Dog mis- • Temperature -55°C. to .1.25*C. siles over 300 miles from target. • Insulation resistance at least 30.000 Nlegortm at 200 VDC B-58's will be coming in at 70,000 • Low leakage inductance • Epoxy vacuum impregnated ft, and B-70's, even higher, will be • Epoxy encapsulated launching long range missiles. Immediate shipment on all stock transformers With operational surface-to-sur- Custom designs for unique circuit requirements available on order. Prices dependent on quantity and specifications. face missiles, this picture is filled in by ICCM Snarks, coming in from high altitudes; ICBM's Atlas and PCA ELECTRONICS, INC. Dept. E-29 Titan, launched from the U. S., ap- 16799 Schoenborn St., Sepulveda, California Please send data on Transistor Transformers: pearing from "outer space"; and D Complete catalogue. IRBM's Thor and Jupiter launched D Specification sheet on which we will indicate our special requirements. from Europe. ELECTRONICS, INC. NAME 16799 Schoenborn Street COMPANY (Part II of this series will describe Sepulveda, California STREET-- - SAC's communications systems, Phone: EMpire 2-0761 CITY internal and external.)

ELECTRONICS - February 13, 1959 CIRCLE 27 READERS SERVICE CARD 31 eDifference is in the Quality

Four and Five-Digit Transistorized DC VOLTAGE INSTRUMENTATION For Rapid, Precise Voltage Measurement

Designed for Versatility Engineered for Reliability Precision Built, yet Rugged Easy to Use, Easy to Maintain THE SUPERIOR DIGITAL INSTRUMENT

NOT JUST A'VOLTMETER' •• • Space Age know-how that goes inlo Cubic Corporation's missile .this superior Cubic instrument can tracking systems is also an importaiit engineering and production measure with great accuracy every phenomenon of science which can be component of Cubic DC Voltage in >trumentation. The 4-digit and converted to a usable DC voltage level... pressure, temperature, depth, 5-digit Voltmeters, powered by the Cubic Control Unit, offer such volume, salinity, etc. Great economy can be effected through use of the quality features as unit plug-in construction, a precise two-part Digital Voltmeter in applications which r.equire precise, legible read- filter that eliminates the effect of Ad ripple on DC readings, shock- ings to the unskilled worker without mounted stepping switches with "controlled drive," in which the danger of costly operator error. Out- standing engineering and design tal- switch turns off the drive circuit pari: way through its cycle, ending ents have been combined to produce this fine DC Voltmeter, the most re- overdrive and eliminating impact var. Clear visual display is pro- liable Digital instrumentation available today. vided by an ultra-brilliant, edge-lighted read-out containing in-line

numerals one inch high. Transistarization ends warm-up time, SPECIFICATIONS lengthens instrument life. Cubic's attention to fine detail increases Available with 4 digit (Model V-41 )or 5digit (Model V-51) display, the Digital the precision, reliability and functainal capability of each instru- Voltmeter is powered by Control Unit Model C-1, which includes apower sup- ment and at the same time provides such outstanding features of ply, precision reference and differential amplifier, and which, separately housed, standardization as printed circuit bards that are interchangeable supplies power to as many units as are required in a Digital System. The Cubic ant stepping switches that swing Voltmeter provides an accuracy of .01% up and out for ease of routine plus or minus 1digit, between ±.0001V and ±999.9V (Model V-41) and makntenance. Cubic quality is ±0.0001V and ±999.99V (Model V-51). Low level voltages ±10 microvolts may yolk guarantee of truly fine be measured by the addition of the Pre- amplifier unit, Model PA-1. instirumentation.

Unit construction of the Cubi c Volt meter an d oth er Di gita l instruments prov id es maximum flexi bility in creating

•" systems that design themselves." Inter-case wiring and standard-size plug-in units maka every Cubic System acustom- ized system using standard units."Building Block" units which can be added easily to increase systems capabilities are the DC Preamplifier, AC-DC Converter, Digital Ohmmeter, Ratiometer, Master and Auxiliary Scanners and Printer Control Units. Write today for further information.

CUBIC CORPORATION 5575 Kearny Villa Road, San Diego 11, Calif. UBIC ELECTRONIC ENOINEERING WITH A DIMENSION FOR THE FUTURE

32 CIRCLE 28 READERS SERVICE CARD F-Dbruary 73, 7959 — ELECTRONICS a. Computer Types b. Gold Bonded Types c. Point Contact Types d. Silicon Junction Types

Sylvania ubminiatures ... nucleus of the industry's most complete diode line

Sylvania now complements its complete Bonded series. Silicon junction types offer For further information on any or all of diode line with the newest all-glass, sub- temperature operation up to 150°C with these diodes, contact your Sylvania rep- miniature package. Smallest diodes ever fast recovery time and high reverse re- resentative, or write. Of course, Sylvania produced by the semiconductor industry, sistance. all-glass diodes, like all Sylvania semi- Sylvania all-glass subminiatures increase Wide reverse resistance and voltage conductors, can be purchased in small the opportunities for a more compact ranges are found in the Germanium point quantities directly from your nearby circuit design and layout, and are espe- contact types. Sylvania Distributor. cially adaptable to automatic production techniques. A broad line gives you awide choice of POPULAR SYLVANIA SUBMINIATURE DIODES diode types to meet your particular appli- Computer Types: Gold Bonded Types: Point Contact Types: Silicon Junction Types: cation needs. Computer types feature extra-fast recovery time with good sta- 1N191 1N270 1N126A 1N251 bility and high conduction. If you want 1N192 1N276 1N127A 1N252 very high forward conduction and in- 1N198 1N279 1N128 1N456-1N464 creased temperature capabilities, you'll 1N281 1N625-1N629 find the most practical combination of 1N283 characteristics among Sylvania's Gold

SYLVANIA ELECTRIC PRODUCTS INC. 1740 Broadway, New York 19, N.Y. In Canada: P. 0. Box 1190, Station "0", SYLVANIA Montreal 9.

UGHT1NG • TELEVISION • RADIO • ELECTRONICS • PHOTOGRAPHY • CHEMISTRY-METALLURGY

ELECTRONICS — February 13, 1959 CIRCLE 29 READERS SERVICE CARD 33 It's great to be proud of the place you work

A MAN misses alot if his job me ns only apay- check. He ought to be excited abou the work he's doing. He ought to feel proud of is company— of its past achievements, its curre tprojects, its future. That's the way our engineers an scientists feel at Autonetics. They're young men. Most of them got their BS since 1948. In ten me orable years they have made their company a eader in electronics and electromechanics. Today there is room for engin rs and scientists who want to share the unusual creative problems that lie ahead—in inertial n vigation, digital computers, armament control, flight control, and a host of special military a d commercial products. If you'd like to join Autoneti ,please send your resume to Mr. C. B. Benn .ng, 9150 East Imperial Highway, Downey, Calif enia. Autonetics A DIVISION OF NORTH AMERICAN ,,VIATION, INC. Downey, Californio

Among the achievements of Autonetics' young en: the first successful airborne all-inertial navigation syste ...first navigation system accurate enough to guide the USS Nautilus and Skate on their historic voyages beneath Arcti ice ... first successful automatic star tracking by an inerti Inavigation system during daylight flight ... first complete y maneuver- able, inertially: stabilized gyro platform ... fir t successful completely automatic landing system for super nic missiles and aircraft ... first transistorized portable digi al computer with "big computer" capabilities.

34 February 13, 1959 — ELECTRONICS Inside Man-in-Space Capsule

One of Project Mercury's key electronic features will be a closed loop attitude control system. Total contract exceeds $15 million

CLOSED LOOP attitude control system lator Co. says its aeronautical divi- systems. Total cost of about 12 will be one of the principal elec- sion will build the "inner ear" Mercury capsules is expected to top tronic features of the Project Mer- stabilizing and control system for $15 million. cury man-in-space capsule (ELEC- the capsule under subcontract to Retrograde System TRONICS, p 9, Jan. 23). McDonnell Aircraft. Firm explains National Aeronautics and Space that the system will inform the man Other important roles to be Administration has disclosed that inside, who will be in a state of played by electronics in Project the system will consist of an atti- weightlessness, when he's tipping Mercury include: tude sensor with reaction controls. over or hanging upside down. •Control of the retrograde sys- The reaction controls will keep the In case of launching failure, firm tem. Retro-rockets will be fired upon capsule at desired orbital attitude, says, the Honeywell system will a signal either initiated by ground and will establish the proper angle automatically eject the capsule control command link or by the man for retro -firing, reentry or an abort from the missile and control safety himself. This control over atmos- maneuver. features such as parachutes, bal- phere reentry allows predetermined NASA says pilot will have the op- loons and signalling devices. M-H impact area. tion of manual or automatic reac- says it's making systems for a •Instrumentation will measure tion control while orbiting. With dozen or more capsules. and monitor internal and external manual control, optical displays will McDonnell Aircraft's proposal capsule environment; medical in- permit him to see portions of the for a manned capsule was the one strumentation will obtain pilot's re- earth and sky so he can position the NASA accepted last month. Collins actions. Data from both will be capsule to desired orbital attitude. Radio has subcontract for in- recorded, then telemetered to Minneapolis -Honeywell Regu- strumentation and communications ground recorders. •Radar chaff will be used to pin- point capsule after it reenters the atmosphere and slows to the speed of sound. Tracking beacons and two-way voice radio will aid recovery after capsule lands. •Two-way communication between pilot and ground station will be maintained throughout flight.

Circular Orbit NASA says the space capsule will be launched by an Atlas-D missile booster and guided from the ground into a near circular orbit between 100 and 150 miles into space. It's expected to make three or four or- bits before being returned to earth. But launching of manned capsule from Cape Canaveral may be two or three years away. Tracking of Mercury will be done by existing Minitrack and Micro- lock stations, says NASA, although some other stations may be added. Tests on the escape system start in a few weeks at Wallops Island, Va. About six test shoots now planned will carry animals, probably monkeys, NASA says, and an animal will be put into orbit and Model of space capsule to carry man into orbit is examined by T. Keith Glennan (left), returned before a manned capsule NASA administrator, and James S. McDonnell, president, McDonnell Aircraft Corp., prime contractor for project is launched.

ELECTRONICS—February 13, 1959 35 How You Can Cut Product Costs

With Indox VCeramic Magnets great resistance to demagnetization, and inexpensive, non-critical raw Experience in the design and production of Indox V, for such materials — plus an energy product products as the loudspeaker below, points the way to sub- over àlree times that of non-oriented stantial savings in manufacturing costs for other products ceranhic magnets. using permanent magnets. APPLICATIONS WHAT IS INDOX V In ox V's excellent magnetic qual- Indox V is a highly oriented bari- powerful permanent magnet mate- ities and special properties suggest um ferrite material. Its energy is rial available. Indox V magnets wide !usage in many applications. comparable, on an equivalent weight possess unique advantages — light basis, to that of Alnico V—the most weight, high-electrical resistivity, Amorig them: D. C. Motors of Medium Size with Indo V fields have ahigh efficiency and show high starting and stall NEW INDOX V LOUDSPEAKER DESIGN... torques characteristic of series wound Cuts magnet cost 20% •Saves 25% on weight • Reduces length 46% • motors. High fidelity, permanent magnet loudspeakers normally HoldJng Devices can take advantage use an Alnico slug (A) or ring (B) magnet. Assembly (C) il- of Indox V's total potential energy lustrates how one loudspeaker was redesigned to use Indox V, whid, per pound of magnet weight, with the results indicated. Assemblies shown in proportion. is appreciably higher than that of Alnicla V. (A) Tome Drives using Indox V discs can he magnetized with multiple- pole faces. The list of other promising applications is growing. WHO MAKES INDOX V Only Indiana Steel Products makes this oriented ceramic magnet, TOTAL WVGNE .AAGNET, POI, CENTER POLE' = 26 IRS. with an energy product of 3.5 mil- (8) lion 13,,Hd. And, because Indiana also produces Alnico and all other

perm lanent magnet materials, it is uniquely qualified to recommend the one Fest material for your design. You are invited to consult with Indiana's design engineers for expert

TOTAL WEIGHT MAGNET. POT, CENTER POLE) A 20 LIS. help Ion any application involving permanent magnets.

TOTAL MUG. IPUGNET, POT. CENTER POLE) =ES IRS. copy of the bulletin "Indcx V Ceramic Permanent Mag- nets,' describing magn.tic properties, THE INDIANA STEEL PRODUCTS COMPANY INDIANA design considera- VALPARAISO, INDIANA tions, and sizes and shapes available PERMANENT from stock for experimental work. WORLD'S LARGEST MANUFACTURER Ask for Bulletin No. 18-A2. OF PERMANENT MAGNETS MAGNETS

IN CANADA: The Indiana Steel Products Company of Canada Limited, Kitchener, Ontario

36 CIRCLE 31 READERS SERVICE CARD RCLE 32 READERS SERVICE CARD—>. NEW SILICON TU\SISTHS FOR FAST POWER SWITCHING

oon +10V 1111•••

11A H11 IF 1 f7- 1I I t 1I It- IF

+10V — 10V

SWITCHING TEST CIRCUIT 50 ma pulse .2p.sec/cm on Tektronix 541 Oscilloscope

Featuring fast switching, low ABSOLUTE MAXIMUM RATINGS capacitance, and good bottoming 2N1140 ST4080 ST4081 2N339 2N342 2N343 voltage in the range of 10 to Vee 40 60 60 55 so 60 Volts 100 milliamps, Transitron's Veb 5 3 3 1 1Volts 2N1140 extends what is already Power Dissipation industry's widest range of 100°C amb. 0.5 0.5 0.5 0.4 0.4 0.4 Watts silicon switching transistors. I00°C case 1.2 1.2 1.2 Watts The 2N1140 is designed for use SPECIFICATIONS AND TICAL CHARACTERISTICS AT 2S'C as a drum memory driver, core driver-driver, and high level he,. at IKc lc = 10 ma,Vc = 10 Volts 50 20-50 30-90 9-90* 9-32° 29-90° multivibrator. 'Co ai Max. rated voltage 15 25 25 50 50 504 Additional new types ST4080 Max Rcs and ST4081, because of their at le = 20 ma,l e = 5ma 50** 100 100 300 350 350 ohm Beta linearity and superior hfe at 10 mc typical 5 bottoming, offer many ce advantages over types 2N339, at Veb= 10 volts,le = 0 16

2N342 and 2N343. hfe at le = 50 ma,Vee = 6V 50 Rise time For further information, .13 msec. Fall time .10 bisec. write for Bulletin TE-1355. •at ic = 5ma "at I= 50 ma vc = lo volts lb = 5ma

TRANSISTORS • RECTIFIERS • DIODES • REGULATORS • VOLTAGE REFERENCES Tra n§itron

electronic corporation •wakefield, massachusetts

VISIT US AT IRE SHOW—BOOTH NOS. 2433-2437 advancement Japan Acts to Slow in instrument design Research subsidies aim at raducing dependence of electronics industry on U. S. licenses, now at high mark. Capital tie-ins al:o substantial

TOKYO— PATENT licensing agree- Ja anese electronics industry ments and capital tie-ins between cli bed from $375,000 in 1957 to American and Japanese electronics $4 8,000 last year. This year the firms today are at a record level. Mi listry expects to hand out $600,- null But a plateau may have been 00 for research. MEDALIST* indicators reached, at least in the number of oday, there are 101 MITI-ap- READABLE... WIDE RANCE SENSITIVITY licensing agreements, ELECTRONICS pr ved patent licensing agreements Modern MEDALIST design provides for greater readability and modern styling in learned this week. in .lectronics between Japanese and minimum space. Unique core and magnet structure provides ji uoirnm sensitivity at Here's the picture, as described fonign firms, mostly American. So null point with sharp square law attenuation by a number of industry and gov- pri :ed have these licenses been in to 100 ue at end of scale in Type A. Internal resistance is 2000 ohms. Other sensitivities ernment sources: receit years that some 200 other available. ASA/MIL 2! 2' mounting. Standard end special colors. Bulletin on request. The Japanese electronics indus- ele.tronics firms are believed to Marion Electrical Instrument Co., Manchester, try currently pays $11.1 million a ha e sought approval to enter into N. H., U. S. A. A subsidiary of Minneapolis- Honeywell Regulator Company. year in royalties to U. S. and other for tign licensing arrangements. T.M. Reg. U.S. Pat. Off. V.S. Ic Foreign Patent., foreign electronics firms. It likes eason for the great demand: Copyright 4.> 1559. Marlon to compare its research spending Eletrical and communications marion to this royalty total. Ratio jumped equipment manufacturers rushed to "WHERE ELECTRONICS MEETS THE EYE H to 2:1 last year from 1:1 the year obt tin foreign patents and techni- meters before as the second government- cal knowhow after World War II CIRCLE 30 READERS SERVICE CARD subsidized, five-year electronics de- wh .n they realized they lagged 20 velopment program started. to 0 years behind the U. S. 'censing and technical assist- Subsidy Increasing anc> agreements, and later a re- send for this Observers believe that with the sur ence of Japanese research, has Ministry of International Trade ste dily narrowed this gap. Now and Industry (MITI) sinking more the government can afford a more ..... money into electronics each year, eau .ious attitude on licensing. FREE the government will discourage new II the transistor field, for ex- EICO large-scale import of foreign patent am de, the government has shown Imowhow. MITI's subsidy to the con .ern about large volume produc- Electronics Catalog

you save 50% on Top-Qualify 'Sun and Rain' Test Chamber Test Instruments Hi -Fi • Ham Gear KITS AND WIRED for professional and home use

TEST INSTRUMENTS battery eliminators stereo and monaural battery testers tuners bridges preamplifiers decade boxes power amplifiers electronic switch integrated amplifiers flyback tester speaker systems oscilloscopes probes HAM GEAR signal and cw transmitter sweep generators modulator•driver tube testers grid dip meter transistor tester vacuum tube OVER 11/2 MILLION voltmeters EICO instruments In volt-ohm- use throughout milliammeters the world. LIFETIME service and calabration guarantee. IN STOCK at your neighborhood EICO dealer. Send now for FREE catalog E-2

33-00 N. Blvd., L. I. C. 1, N. Y. "You name if, we have it," might well be nickname for new rain and sunshine test L7EICOg' ...praised by -the experts chamber for electronic components, other items. Tenney Engineering, Inc., made equip- as BEST BUYS IN ELECTRONICS ment for Frankford Arsenal in Philadelphia. Technician tests power cables on wooden holders in "sun" (left), then prepares to test ammur ition boxes under rainfall conditions CIRCLE 33 READERS SERVICE CARD 38 February 13, 1959 ELECTRONICS WHATEVER YOUR UHF Licensing ATTENUATION NEEDS... tion. Recent bid by Hitachi for a new transistor license was turned AT-104: 12 POSITION STEP ATTENUATOR down by MITI; firm already makes USING AT-50 ELEMENTS. DC TO 4000 MC. A COAXIAL UNIT FROM transistors under other license agreements. Toshiba, Nippon Elec- EMPIRE DEVICES tric, Sony, Kobe Industrial and Matshishita are among other Japanese firms manufacturing WILL MEET transistors under U. S. licenses. YOUR REQUIREMENTS Links to U. S. Firms

Here are some of the U. S.-Japa- nese capital tie-ins involving large American electronics firms:

Westinghouse owns 4 percent of AT-103: 6 POSITION STEP ATTENUATOR the stock of the Mitsubishi Elec- USING AT-50 ELEMENTS. Empire's UHF attenuators are DC TO 4000 MC. tric Mfg. Co. However, Mitsubishi resistive coaxial networks for the fre- manufactures radio and tv sets quency range from DC to 4000 MC. under RCA license and transistors under Western Electric license. Accuracy is held to ±--1/2 DB, VSWR Mitsubishi also manufactures radio is better than 1.2 to 1. Any anemia. tion values up to 60 DB (120 DB gear for F-86 jet planes with tech- for Model AT-106) ,are available. nical assistance from Collins Radio. Deposited carbon elements are used Nippon Electric Co., which manu- for stability and operations at higher factures mostly communications pulse levels. Standard impedance is equipment, is 21 percent owned by 50 ohms, other values upon request. ATTENUATOR PADS. International Standard Electric These units have excellent tempera- DC TO 4000 MC. Corp., ITT subsidiary. Total cap- ture characteristics and are vibration AT-50: 1 W AVERAGE, 1KW PEAK AT-60: 2W AVERAGE, 2 KW PEAK italization: about $11.1 million. and shock resistant. Standard con- Shin (for New) Nippon Electric nectors are type "N", attenuator pads Co., a subsidiary of Nippon Electric are also available with type "C". with capitalization of $555,000, is The attenuators may be obtained as 10 percent owned by Sylvania individual pads (AT-50, AT-60), which licenses it to make vacuum or as multi-position step attenuators tubes and other products in return AT-103 (six positions) and AT-104 for a 2.5-percent royalty payment (twelve positions). For even greater on total sales. Firm said none of flexibility, Attenuator Panels, Model these products was exported to the AT-106 (two or three step attenu- U. S. last year. ators in series connected) are ISE owns 13 percent of Sumi- recommended. tomo Electric Industries and has a 10-year license agreement with the Japanese firm running to 1960. For complete technical information Under it Sumitomo makes l-f toll AT-106: ATTENUATOR PANEL. about attenuators for your TYPICAL COMBINATION: AT-10611, cable, plastic insulated wire and laboratory or production needs, 0-120 DB IN 1DB STEPS. cable, carrier and coaxial cable. write for free catalog. Nippon Remington Univac NEW YORK—MOunt Vernon 0.7530 • SYRACUSE—GRande 0-7409 • PHILADELPHIA—SHerwood Kaisha entered the Japanese com- 7-9080 • BOSTON—TWinbrook 4.1955 • WASHINGTON. D. C.-0Liver 0.6400 • ORLANDO. FLA.—CHerry 1-2128 • ATLANTA—CEOs,- 7.7801 • DETROIT—BRoadway 3.2900 • CLEVELAND puter market last April as a joint —HIllcrest 2-8080 • PITTSBURGH—ATIantie 1-9248 • ST. LOUIS—EVergreen 5-7728 • CHICAGO —ESterbrook 9-2700 • MINNEAPOLIS—FEderal 5.7172 • DENVER—MArn 3.0343 • fl. WORTH— venture involving Remington Rand WAInut 64444 • ALBUQUERQUE—ALbuquerpue 5.9632 • LOS ANGELES—TExas 0.7771 PALO ALTO—DAvenport 34455 • SEATTLE—EMerson 2.4812 • HAWAII: HONOLULU 50-2901 CANADA - STITTSVILLE. ONT.—Haxeldean 56 • SCARBORO. (TORONTO)—AXrninster 3-7806 Univac, Daiichi Bussan and To- EXPORT- NEW YORK --MUrray Hill 2-3760 shiba. Firm expects early MITI EMPIRE DEVICES approval of its application to produce Univac computers. PRODUCTS CORPORATION Minneapolis-Honeywell Regulator AMSTERDAM, NEW YORK Co. holds 50 percent of the shares Telephone: Victor 2-8400 of the $600,000 Yamatake-Honey- manufacturers of well Instrument Co. FIELD INTENSITY METERS •DISTORTION ANALYZERS •IMPULSE GENERATORS •COAXIAL ATTENUATORS •CRYSTAL MIXERS

ELECTRONICS—February 13, 1959 CIRCLE 39 READERS SERVICE CARD 39 ...SYNONYM .for PRECISION in ÉMING

For timing requirements in esearch, testing or production ... if the need for prejsion is paramount ... the choice is STANDARD. Recognized as THE crit rion by which other timers are judged (and calibrate i) , STANDARD Elapsed Time Indicators are noted fe their long life under continuous use. Large enough to work wi h handily and read readily, STANDARD timers are eectric clutch controlled by manual or automatic switc or by electric circuits or output of electronic tubes. Inits are synchronous motor driven ... available for flus panel mounting or portable use ... equipped for manua or electric zero reset. For ultra precision ti sing with AC current, models available for 4 )0 CPS operation. Also available: 400 CPS pow 'r supply operating from DC source.

SCALE MODEL TOTALIZES ACCURACY DIVISIONS

S-100 1/5 sec. 6000 sec. +.1 sec.

S-60 I/5 sec. 60 min. +.1 sec.

SM-60 1/100 mitt. 60 min. +.002 min.

Request descriptive Catalog S-10 1/10 sec. 1000 sec. +.02 sec.

No. 198 S-6 1/1000 min. 10 min. +.0002 min.

S-1 1/100 sec. 60 sec. +.01 sec.

MST 1/1000 sec. .360 sec. +.001 sec.

MST-500 1/1000 sec. 30 sec. + .002 sec.

89 LOGAN STREET THE STANDARD ELECTRIC TIME COMPANY SPRINGFIELD, MASSACHUSETTS

Travelling Display— ALSO MANUFACTURERS OF: Watch for showing in your area. See o 1 complete STAND- [40. ARD Systems in operation. Emergency 1 toberotory 1Hospe-:-.to ISignc lling Analogue Precision Lighting Equipment Panels Equipmen ' Computors Timers

40 CIRCLE 35 READERS SERVICE CARD February 13. 1959 — ELECTRONICS Here's a compact honey! The new RCA "VC" (Very Compact) Picture Tubes—now 2 inches shorter than their prototypes!

Now commercially available in the new "VC" 110° designs are the RCA-17DKP4 and RCA-21EQP4, all-new premium types. They utilize conventional 110° components and circuitry. And, with only slight changes in focusing-voltage control, they are unilaterally interchangeable with previous 110° types. RCA "VC" 110° types employ the same heater cathode assembly that has been used and proven for reliability over the past decade in RCA Picture tubes. RCA FIELD OFFICES EAST: 744 Brood Street So, when the need arises for aslim, very compact TV-set design, contact your RCA Field Newark 2, N. J. HUmboldt 5-3900 Representative. Your pass words are RCA "VC" 110° Picture Tubes. For technical data, M1DWEST:Suite 1154 Merchandise Mort Plaza write RCA Commercial Engineering, Section B-19-Q2, Harrison, N. J. Chicago 54, III. WHitehall 4-2900 WEST: 6355 E. Washington Blvd. Los Angeles 22, Calif. RADIO CORPORATION OF AMERICA RAymond 3-8361 Electron Tube Division Harrison, N. J.

CIRCLE 36 READERS SERVICE CARD t Mew, ' ••,••• 4

•2«es Y/1

- -4 -

eT47,C ReFee5evce 5-7-eric ter,oecde

Iiiiretonched Visicorder Record—actual sh:c H HONEYWELL

Wyle Laboratories in El Segundo, California, have Dick Johnson, Instrumentation Branch Head used a battery of four Visicorder consoles like at Wyle Laboratories, says. "This system, Ifeel, is the one shown below to run a series of tests on a one of the most efficient instrumentation con- vital missile component. In the Wyle test project soles in operation. Set up and calibration time has the unique Visicorder consoles are easy to operate. been reduced by the use of Visicorders by approx- Most parameters are low frequency, requiring imately fifty percent. This is due to the simplicity response on the order of 5 to 60 cycles. of operation and trouble-free performance. There The two calibrator control panels in each of are no inking pens to clean, high-gain amplifier the Visicorder consoles accommodate 10 plug-in maintenance, and so on, and we can also use these balance and matching units—designed to match consoles together to form systems of more than tachometer generators, pressure transducers, six channels." thermocouples, expanded-scale voltmeters, etc., to the Heiland galvanometers. of a missile component

The HONEYWELL VISICORDER is the first high- frequency, high-sensitivity direct recording oscillograph. In laboratories and in the field every- where, instantly-readable Visicorder records are pointing the way to new advances in product design, rocketry, computing, control, nucleonics ... in any field where high speed variables are under study. To record high frequency variables—and monitor them as they are recorded—use the Visicorder Oscillograph. Call your nearest Min- neapolis-Honeywell Industrial Sales Office for a demonstration.

Reference Dota: Write for Visicorder Bulletin Minneapolis-Honeywell Regulator Co., Industrial Products Group, Fleiland Division 5200 E. Evans Ave., Denver 22, Colo.

Tom Jackson, Wyk mincer, examines Visicorder record

Honeywell q.dhar,.Aip„,cee. get?,

CIRCLE 38 READERS SERVICE CARD 43 ELECTRONICS—February 13, 1959 12 POPULAR MODELS FROM OUR STOCK OF OVER A MILLION RELAYS

CRYSTAL CAN BOA TYPE 45 TYPE J

C. P. Clare Advance e Automatic Electric 9

CERAMIC KEYING - r

Leach

Phillips Conti el , —,934,1-14eD C. P. CLARE Guardian Electric IC

DC CONTRACTOR REVERSING 710 MIN IATURE PC e. CONTACTOR •••••1

-C

(44,

Potter & Brumfield 4 TERADO o

Order from the world's most complete stock of •• • Relays Why order from several sources when you FOR 24 HOUR DELIVERY can buy all your relays from us! CALL WEST CHICAGO 1100 Save the cost of multiple purchase orders, delivery dates and payments. Save confusion and delay waiting for relays to be manufactured. Phone or write foi We have over amillion latest models in stock. latest Relay catalog Specify the contact arrangement and coil rating and price list you need..No order is too small, nor too big. All relays are new, inspected and unconditionally guaranteed as represented. RELAY SALES, INC. P. O. Box 186 West Chicago, Illinois

44 CIRCLE 39 READERS SERVICE CARD Febrqary 13, 1959 — ELECTRONICS Make Royal your source for Coaxial Cables. Modern, integrated production facilities here meet the many and diverse demands of the electronics industry. Look to Royal for single and multi- conductor cables with built-in performance dependability. Request Bulletin 4C-3-L listing stock constructions, or let us quote on your special requirements.

For automatic steering—Bendix's sonar gear with radar and automatic pilot. Demon- strator's hand is on pilot control box. Unit atop radar is a new depth indicator

How New Boat Units Work More transistors and printed circuits are in electronic devices now on market

TODAY THERE are 3,620,000 cruis- Radar is still comparatively in ers, runabouts and utility outboard the luxury class. Sets cost around boats in the U. S. And this year $3,500, and to date, commercial electronics firms are wooing this fishermen have constituted a fatter market more than ever—with ad- market than yachtsmen. Last year, vanced designing, more transistors which was a good fishing year, $12- and printed circuits in new equip- million worth of electronic equipment. ment was delivered to the Gulf One new marine radiotelephone shrimp-boat fleet alone. (Most of using transistors draws only 6.5 this was primarily for radar, but amps from a 12-volt battery. The also for fishfinders and highpower unit radiates 20 watts. radiotelephones.) Several reasonably priced auto- Big Market matic pilots are on today's market, Direction finders, constituting directed largely at fishermen who one of the larger segments of the like to troll. One firm is coming out small boat market, come in two with a specially designed unit cost- classifications: manual and auto- ing between $200 and $300. Cur- matic. Typical manually operated rent models utilize a narrow beam CAR units cost $150 and up. Automatic of light projected through a com- ';rr."7.' 3 ROYAL units fall into the $1,200 to $1,500 pass card onto a photoelectric cell. ELICIMA range. One manually-operated d-f, Slightest course deviation causes selling for $300, features eight change in intensity of light beam, transistors and printed circuitry hence in cell output. Amplified out- ' throughout, self-contained bat- put of cell operates steering mech- •Formerly manufactured by Federal Telephone teries, distortion-free three-band anism to control rudder. & Radio Company reception—beacon, marine and Other electronic items recently broadcast. introduced include a transistorized ROYAL ELECTRIC CORPORATION 301 Saratoga Avenue A more sophisticated automatic megaphone which can double as a PAWTUCKET • RHODE ISLAND d-f presents course and bearings on foghorn, gas detectors for bilges, the face of a cathode-ray tube, re- a 24-faceted aluminum radar target quires no null meter, indicates on- which will reflect over seven miles station tuning by appearance of a and facilitate spotting by larger ;.,er LECTRIC propeller-shaped signal pattern. ships. r .; • lot< of 2 CIRCLE 40 READERS SERVICE CARD

ELECTRONICS —February 13, 7959 45 MEETINGS AHEAD

Feb. 12-13: Transistor & Solid-State Meet us at Circuit Conf., AIEE, PGCT of IRE, Univ. of Penn., Philadelphia.

Feb. 12-13: Electronics Conference, THE IR E SHOW AIEE, IRE, ISA, CPS, Eng. Soc. Bldg., Cleveland.

Feb. 16-20: Western Audio Conven- Booths 3314-16-18 tion, Audio Eng. Soc., Biltmore Hotel, Los Angeles. MARCH 23-26 Mar. 3-5: Western Joint Computer Conf., AIEE, ACM, IRE, Fairmont Hotel, Los Angeles. Marconi Instruments market 117 different equipments so don't expect w see them all! But there Mar. 5-7: Western Space Age Conf. will be awide selection of absorbing interest to all and Exhibit, L. A. Chamber of Com- electronic engineers. The three below are represent- merce, Great Western Exhibit Cen- ter, Los Angeles. ative of the types of instrument that American industry has relied on for tnany years. • Mar. 15-18: National Assoc. of Broad- asters, Annual Convention, Conrad Hotel, Chicago.

Ms r. 23-25: Flight Testing Conf., STANDARD SIGNAL GENERATOR American Rocket Society, Daytona Model 867 Beach, Fla. FREQUENCY RANGE: 15 kc to 30 mc on 53-ft high- discrimination full-vision scale. Mar. 23-26: Institute of Radio Engi- CRYSTAL ACCURACY: 0.01% With built-in 1-111C harmonic source. reers, IRE National Convention, OUTPUT RANGE: 4 PV 10 4 volts at 75 ohms. 0.411V Coliseum & Waldorf-Astoria Hotel, to 0.4 volt at 13 ohms. Automatic level control for good stability. New York City. AMPLITUDE MODULATION: Monitored and variable up to t00% • high quality assured by envelope negative feedback. Modulation frequencies, 400 Mar. 26: Quality Control Clinic, and 1,000 cps. Less than zoo c's spurious FM. ASQC, Univ. of Rochester, Ro- F.M. SIGNAL GENERATOR chester, N. Y. Model to66A FREQUENCY RANGE: loto 470 mc, on fundamen- Ma 31-Apr. 2: Millimeter Waves tals throughout. 0.0025% short-term stability. DIRECT-READING INCREMENTAL TUNING: Stepped Symposium, Polytechnic Inst. of control up to • 15 kc; continuously variable from Brooklyn, USAF, ONR, IRE, USA o to zo and o to ioo kc. OUTPUT RANGE: 0.2 etv to 200 MV at 50 ohms. Signal Research, Engineering Soci- MODULATION: FM deviation continuously vari- e.ies Bldg., N.Y.C. able and monitored from o 10 20 and o to ioo kc. Also AM up to 40 0 ;,. Modulation frequencies. I and 5 kc. Apr. 5-10: Nuclear Congress, spon- CARRIER DEVIATION METER sored by over 25 major engineering Model 791D and scientific societies, Public Audi- MEASURES DEVIATION: 200 CpS to 12> kc in four tcrium, Cleveland. ranges; measures down to 10 cps using external readout. CARRIER FREQUENCY RANGE: 4 to 1,024 mc, Apr. 6-7: Astronautics Symposium, directly calibrated. Air Force Office of Scientific Re- MODULATION FREQUENCY RANGE: so cps to 35 kc. CRYSTAL LOCKING: ensures freedom from micro- search, Sheraton-Park Hotel, Wash- phony, allows measurement of FM hum and ington, D.C. noise in VHF and UHF communication and broadcast transmitters. Apr 6-9: British Radio and Electronic Co.mponents Show, Great Hall, Gros- AM & FM SIGNAL GENERATORS venor House, Park Lane, London AUDIO & VIDEO OSCILLATORS FREQUENCY METERS W.'. VOLTMETERS • POWER METERS MARCONI DISTORTION METERS Apr . 13-15: Protective Relay Conf., FIELD STRENGTH METERS A & M College of Texas, College INSTRUMENTS TRANSMISSION MONITORS DEVIATION METERS Stition, Tex. OSCILLOSCOPES. SPECTRUM RESPONSE ANALYSERS Apr. 14-15: Industrial Instrumenta- Q METERS & BRIDGES tion & Control Conf., PGIE of IRE, Armour Research Foundation, Il- linois Inst. of Tech., Chicago. Ill CEDAR LANE •ENGLEWOOD •NEW JERSEY Tel: LOwell 7-0607

Canada: Canadian Marconi Co. Marconi Building, 2442 Trenton Ave. Montreal 16.

MARCONI INSTRUMENTS LTD • ST. ALBANS • HERTS • ENGLAND TI rere's more news in ON the ARKET, PLANTS and PEO- PI ,E and other departments be- gi ruling on p 86.

IC 147 46 CIRCLE 41 READERS SERVICE CARD Fe ruary 13, 1959 — ELECTRONICS The "Inside Story" of Power Wire Wound Resistors

Resisteg 100 Coated Resistor WATTS

Vitreous 75 Enamel Resistor WATTS

50 WATTS

014, ""Iiriii,

v e st. e 25 iees WATTS ,e1 , -\os / o WATTS OHMS 0 10K 20K 30K •40K 50K 60K 70K 80K 90K 100K WHY IRC POWER RESISTORS WITH RESISTEG COATING NEED NO DERATING The big reason is lower curing temperature! IRC's exclusive RESISTEG Coating cures at only 205°F! Think of it... nearly 1000° lower than vitreous enamel coatings! This means the curing operation doesn't change the position of the wire .. . winding turns do not shift together. Wire is not "work-hardened", since no stretching is necessary to prevent shifts. No break-downs from arcing-over. Even at high values, IRC Wire Wound Power Resistors need no derating... offer greater stability and longer life. Write for Catalog C-1!

INTERNATIONAL RESISTANCE COMPANY •Dept. 374, 401 N. Broad Street, Philadelphia 8, Pa.

ELECTRONICS — February 13, 1959 CIRCLE 42 READERS SERVICE CARD 47 KEARFOTT PRECISION RESOLVERS FOR EVERY SYSTEM APPLICATION .41

Kearfott has available a complete line of precision seconds of arc in accu'acy, from 8 to 25 in size. resolvers for every system application. Computing All Kearfott resolvers feature stainless housing, resolvers range in functional accuracy from .05% shafts and bearings arid corrosion-resistant lamina- to .005%, in bridge accuracy from 3 minutes to 20 tion materials for maximum environmental resist- seconds of arc and in size from 11 to 25. Non- ance. Optional designs a;ailable for operation at 200'C compensated resolvers range from 5 minutes to 20 and in environment of '2000 cps vibration at 30 g's.

Computing Available with integral compensating windings. Ca -1be provided with trimming networks to match existing isolatiol Resolvers amplifiers or Kearfott-designed transistorized amptifiers.

Size 11 Size 15 Size 25 For applications where size and A 2:1 improvement in functional work for standard buffer amplifiers. For applications demanding the good functional accuracy are of accuracy and bridge error obtained Transformation ratio is 1.000 ± highest order of accuracy. Close paramount importance. Functional in this configuration. Unit tabulated .0001, phase shift 0° 1.-- 1 minute. attention has been paid to design accuracy as good as .05% and is the direct equivalent of standard Functional accuracy of .025% and parameters. bridge errors of 3 minutes of arc Navy BuOrd Mark 4 Mod 3 and bridge error of 1.5 minutes of arc are in production. contains necessary trimming net- are standard.

Size 18 BALANCED A special resolver which permits LOAD o unique cascading of these units o without the necessity for buffer

amplifiers. Typical application is ..••••••••11.110 illustrated in following cascade: RESOLVER RESOLVER RESOLVER RESOLVER 1 2 3

R.-..:RESOLVER C= INTEGRAL CÓMÉ'ENSATOR

COMPENSATED RESOLVERS FOR PRECISE COMPUTER APPLICATIONS SIZE 1 15 18 25 PART NUMBER R980-01 R980-41 T980-51 V980-004 425506-1 Excitation Volts—(Max.) 60 60 26 26 25 Frequency—(cps) 400 400 400 400 400 Primary Impedance 629 -I- j2510 450 ± j2200 220 + j1000 3000 -I- j(0 -± 4 ) 1630/78.5f Secondary Impedance 695 ± j2750 500 + j2300 240 ± j1100 3000 -I- j(0 ± 4 ) 1620/80° Transformation Ratio (Primary to Secondary) .980 .980 .980 .775 .980 Transformation Ratio (Compensator to Rotor) .985 .985 .950 .775 .985 Phase Shift (Lead) 8.5° 7.5° 8.5° 0° -± 10' 1° Fundamental Null (MV) 15 15 8 15 15 Bridge Error From E.Z. (Max.) 7mins. 5 mins. 3 mins. 3 mins. 20 Seconds Primary Stator Stator Stator Stator j Stator

Non-Compensated Basically for application in precise data transmission Resolvers systems. These synchro resolvers permit system designer to achieve system errors of better than 1minute of arc', without using 2-speed servos and elaborate electronics. , By proper impedance matches up to 64 resolver control transformers can also operate from one resolver transm tter.

Size 11 Size 25 Where size is important. These Where highest accuracy is re- units have a maximum unit error quired. These units have a maxi- cf 3 minutes of arc. mum error as low as 20 seconds of arc.

NON-COMPENSATED RESOLVERS FOR PRECISE DATA TRANSMISSION SIZE 11 SIZE 25 Control Control Type Resolver Transmitter Differential Transformer Transmitter Differential Transformer Part Number R982-004 R982-011 R982-012 Z5161-001 Z5191-001 Z5151-003 Excitation Volts (Max.) 26 11.8 11.8 115 90 90 Frequency (cps) 400 400 400 400 400 400 Primary Impedance 170/77° 850/80° 2000/80° 400/80° 800/80° 8500/80° Secondary Impedance 42/80.5° 1000/79° 8000/76° 260/80° 900/80° 14000/80° Transformation Ratio .454 1.000 1.906 .7826 1.000 1.278 Max. Error from E.Z. 3 mins. 3 mins. 3 mins. 20 seconds 20 seconds 20 seconds Primary Rotor Stator Stator I Rotor Stator ' Stator

Write for complete data. KEARFOTT COMPANY, INC., Little Falls, N. J. A subsidiary of General Precision Equipment Corporation Sales and Engineering Offices: 1378 Main Ave., Clifton, N. .1. Kariba Midwest Office: 23 W. Calendar Ave., La Grange, Ill. South Central Office: 6211 Denton Drive, Dallas, Texas West Coast Office: 253 N. Vinedo Avenue, Pasadena, Calif.

48 CIRCLE 43 READERS SERVICE CARD 3, 1959 — ELECTRONICS - currrR_.,TB W F2, E F'C)R_,T FROM IBM 4, F

The nature of electron transport in asolid

An active program is under way at IBM to investigate are being studied to determine the processes that occur as various mechanisms that influence the conduction of elec- they move through the lattice, "cool," and return to equi- trons in solids. One project of interest is the work being librium. By measuring the detailed behavior of the elec- done by Dr. Seymour H. Koenig of the Watson Research trical conductivity, often in time intervals measured in Laboratory at Columbia University, involving the behav- milli-microseconds, important information relating to the ior of electrons when their mean energy is greater than interaction of electrons with the germanium lattice can would be indicated by the temperature of the solid. be obtained. At afew degrees above absolute zero, the application These investigations at the Watson Research Labora- of even asmall electric field to asample of germanium tory in New York City are adding to our understanding will grossly affect equilibrium of the conduction electrons of basic solid state phenomena at low temperatures as and increase their average energy by afactor of twenty- well as yielding some interesting and unexpected device five or more. The characteristics of these "hot" electrons possibilities.

IBM Investigate the many career opportunities available in exciting new fields at IBM

International Business Machines Corporation, Dept. 5.5482, 590 Madison Avenue, New York 22, New York

CIRCLE 44 READERS SERVICE CARD World's Smallest Battery!

Here's the world's sntallest commercially

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SERVICE LIFE CURVES systems, and other sub-miniature devices. (HOURS OF SERVICE VS. CURRENT DRAIN) 4 A new Technical Data 13ulletin and engi- a (141WAIAPERES) neering samples are available on request. END POINT 2 -""---- 0.9 V A Mallory battery expert will assist in DRAIN solving your own spécifie application problems.

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50 CIRCLE 45 READERS SERVICE CARD February 13, 1959 —ELECTRONICS electronics FEBRUARY 13, 1959

Prototype high-frequency induction heater. Output transformer (center) has high-voltage coil and ring of Fer- roxcube rods inside polyester cylinder; low voltage coil outside. Also shown are heat inductor (left), one thyratron and the anode series impedance coils (right) How Radar Techniques Improve Induction Heating

Induction heating generator operating on spark-gap principle uses hydrogen thyratrons as rapid switches. Short ionization time and high current carrying capacity of thyratrons enable generator to develop 12 kv up to 10 kc

By H. L. VAN DER HORST, Application Laboratory for Gaseous Discharge Tubes, N. V. Philips' Gloeflampenfabrieken, Eindhoven, Netherlands

INDUCTION HEATING is used industrially to harden, thyratrons as rapid switching elements. cast, solder, melt and temper metal. The heating ADVANTAGES OF HYDROGEN—The process of generator described here develops 12 kw at frequen- introducing gas or metal vapor into a vacuum cies up to 10 kc in the workpiece by using hydrogen tube changes many of its properties. Presence of positive gas ions neutralize the negative space charge of the electrons thereby reducing the internal losses. Thus, heavy currents can flow THE FRONT COVER Operational induction heating generator uses four hydrogen thyratrons to switch power. The tubes are through the tube at a comparatively low anode operated sequentially thereby increasing repetition rate and voltage. Also, since the efficiency of these tubes is power by a factor of four. Since one tube fires at co time, only one anode series impedance coil is used. high, forced cooling is not required. Because hydrogen is light gas, the ionization and

51 ELECTRONICS— February 13, 1959 circuit, the maximum voltage V., k across C, is the O. HYDROGEN THYRATRON WITH REPLENISHER same for all values of k and is equal to 2V„. A requirement imposed on the thyratron is that the voltage between anode ar.d cathode is always equal to Vci Vt..> Voltage 17,, rapidly changes polarity during the oscillation of the tank circuit. ---",-HYDROGEN THYRATRON WITHOUT REPLENISHER Voltages VG,+ V, occurring across the thyratron as a function of k are shown in Fig. 3. This graph

CRITICAL GAS PRESSURE shows that immediate y after discharge the voltage across C2 drops to —21,0 independent of k. Oscillograms of the voltage across the thyratron for different values of k are shown in Fig. 4. It can o be seen that either tt e positive tube voltage or the o 1,000 2,000 3,000 TIME OF OPERATION IN HOURS negative tube voltage resulting from the oscillations will exceed twice the value of the supply voltage V, FIG. 1—Variation of gas pressure for hydrogen thyratron with unless k equals unity and the oscillatory circuit is replenisher and for random hydrogen thyratron without replenisher sufficiently damped. The highest peak inverse voltage decreases as k becomes larger, while the highest peak positive voltage is at a minimum when k equals deionization times of hydrogen thyratrons is short. unity. This phenoment is particularly noticeable dur- This characteristic permits an oscillator equipped ing the first few cycles. with such tubes to operate at frequencies up to To prevent either the positive or negative voltages 10 kc. from becoming considerably higher than 2V„ the The simplest way of reaching a considerable ratio k should be roughly equal to unity. In practice, power output is to raise the anode voltage to a high however, thyratrons )perate slightly better if k is value. Maximum peak anode voltage of the 5949 chosen somewhat lower, for example 0.75. An oscillo- thyratron is 25 kv; maximum peak emission current scope trace would then be similar to the oscillogram delivered by the indirectly heated cathode is 500 shown in Fig. 4C. amp. Improvement obtained by making k slightly Since the ignition characteristic of a 5949 thyra- smaller than unity prcbably results from the fact that tron is positive, a positive grid pulse is necessary point B does not act rally reach the excessively low to fire the tube. This requirement holds even for value indicated on Fie. 4C. This limiting occurs be- positive anode voltages. cause the thyratron, being in a conductive condition, is already opposed by the start of tank circuit oscil- CLEAN-UP PROBLEM—A disadvantage of hydro- lation. Since the residual charge of C, is negative as gen thyratrons is the gas clean-up resulting from shown by point D on Fig. 4C, the discharge is im- hydrogen being absorbed. This effect is counter- mediately extinguished. acted by incorporating a replenisher in the tube If k is greater than unity, as shown in Fig. 4B, envelope which consists of a specially processed wire capable of retaining the hydrogen and of acting as a gas reservoir. U.3eli When the temperature of the wire is raised, hydrogen is liberated. This process ensures that equilibrium is established between freed and absorbed gas and that there is a well-defined gas pressure at any temperature. Curves in Fig. 1 show variation of = C10.35 gas pressure with time for thyratrons both with and without replenishers. PULSE SER VOIR SHAPER HIGH-FREQUENCY GENERATOR — Characteris- EATER DP PLY tics of the 5949 hydrogen thyratron make it possible REPETITION to construct a high-frequency generator operating on RATE the principle of the spark-gap oscillator as shown in CONTROL Fig. 2. In this circuit the thyratron simply acts as LOAD a rapid switch. Oscillations in the tank circuit, L2C„ o are of a more or less damped character depending 526p,FI L2 on the nature of the load. LOAD COILS Correct choice of the ratio of C, to C, is of prime C 0.48 importance. Only when this capacitance ratio, de- noted k, equals unity is the charge identical to the discharge taking place during each cycle. This relationship implies that no transient phenomena occur FIG. 2—Basic heating generator circuit. Voltage induced in small coil L. coupled with tank Coil 1.2 is applied to the control circuit during the starting cycles. (Fig. 5) and used to make repetition rate of control circuit depen- At the beginning of the oscillations of the tank dent on tank circuit damp ng

52 February 73, 1959 — ELECTRONICS A K CI K.2 +3

ICYCLE _ A

D -\/ t t

ICYCLE CYCLE

-3 (A) (B) -3 B (C)

FIG. 4-0scillograms of voltage across thyratron for different values of k

FIG. 3-Variation of voltage across hydrogen thyratron as function of k. Curve A applies to the instant before C, has discharged into C ,curve B to the instant after the charge has been transferred to C and curve C to condition after a time t = r (1.2C2)' , has elapsed. Line D represents voltage across C, and line E voltage across Cs immediately after discharge

the polarity of the charge C, is positive and the tube 1,000 cps. For reasons explained later, the repetition works satisfactorily. However, point C then becomes rate must be reduced to accommodate the circuit. particularly high and can lead to disturbing phe- This condition imposes an upper limit on the induct- nomena. In the generator described here, C, = 0.35 ance of L„. id and C2 = 0.48 id, therefore k = 0.73. Too low a value of Ls causes Ve, to reach its final value before tank circuit L,C,, has ceased to oscillate. MAGNITUDE OF INDUCTANCE — Required in- This situation causes the oscillating voltage super- ductance of tank coil L, is closely related to the imposed on the load curve for C, to produce an ex- desired generator frequency f. With a relatively cessively high value of peak forward voltage across small tube load it is possible to raise f to approxi- the thyratron. Also, the energy stored in Ls might mately 14 kc, while with ahigh tube load, good results flow to ground through the thyratron thereby effec- can still be obtained at 10 kc. Since L3 represents the tively short-circuiting the power supply. stray self-inductance of the loaded transformer, the various couplings play an important part. Capacitor REPETITION RATE—The number of times per C, and total inductance L, should form a tuned cir- second the periodical charge and discharge of C, can cuit complying with the condition be repeated depends on maximum average current /„, of the tube. In the circuit described, the current L, C, = 1 averaged over a half cycle is 41.57 = 216 amperes where wilr = f = 10 kc. and the time required to transfer the charge from C, to C2 is 18.6 µsec. The repetition rate should be Prime consideration with regard to L, is that the chosen so that the current averaged over a long charge from C, be transferred to C, as quickly as period does not exceed 0.5 ampere at which point possible without the maximum peak current rat- the repetition frequency is 124 cps. ing of the 5949 thyratron being exceeded. Ratio L1! L2, however, can not be chosen as some arbitarily CONTROL CIRCUIT — Hydrogen thyratron 5949 large value to avoid risk of hampering the extinction must be controlled by a pulse voltage having a dura- of the thyratron. Therefore, it is necessary that the tion of approximately 2µsec. Output power of the gen- instantaneous value of circuit current determined by erator is controlled by adjusting the repetition rate L, and series-connected C, and C', can drop to zero. of the pulse with the three-part control circuit shown Calculation shows this will be the case when LILs in Fig. 5. 0.217. With components valued as shown in Fig. 2 The pulse generator produces voltage pulses of ad- and with V. = 10 kv, the peak current flowing justable frequency for grid excitation of thyratron through the 5949 thyratron is about 340 amperes. V, in the pulse shaper. When excited the pulse In determining the proper inductance for Ls,it is shaper produces, through an artificial cable circuit, assumed that the oscillations in tank circuit L,C, square pulses of sufficient amplitude (about 400 v) die out after 10 cycles, that is, after a time lapse of and duration (2 »sec) to ignite thyratrons V, and Va. one millisec. During this interval capacitor C, will The rate-control circuit controls the repetition rate be recharged through Ls if the repetition rate is of the pulses formed in the pulse generator in ac-

ELECTRONICS — February 13, 1959 53 +500V 1\A 140p.H Rn MEG .00

0.0 I 5727 5727 ei57v= IMEG 0.022 .7.2.--:.0.022 V3 V2 T • R4 IMEG 100K IME

1CK 10K 330 10K 330K p.p.F MG

THYRATRON CONTROL

R1 GRIDS MEG 100K 2.2K 6,800 —

F 0.3 .<> 330K 2

R3 8.2K 60 mH 100K 0.022T

-60V -60V V \A- o K X PULSE GENERATOR RATE -CONTROL CIRCUIT PULSE SHAPER

FIG. 5—Control circuit for heating generator. Pulse-generator controls tube V. in pu:se shaper which d ives hydrogen thyratrons. Rate control circuit regulates repetition rate of pulses formed by generator

cordance with the rate of damping of the tank circuit ignites. The repetition ate is then normal. oscillations. Thyratron V. acts as a switch which, SYNCHRONIZING CII CUITS—Repetition rate of when conducting, allows Ci to discharge rapidly the 5949 hydrogen th ratron can rise to such a through Ri. Conduction takes place as soon as the value or the damping • the tank circuit can be so control grid voltage is sufficiently positive. Thyratron small that an ignition p Ise is applied before the tank V. is eventually extinguished because of the high circuit oscillations have died out. Hence, the instant value of R,. at which the charge i transferred from C, to Capacitor C, is charged through selenium rectifier (Fig. 2) must be chose with care. The most favor- Di to the same voltage as C. and remains charged able instant approximat s a point at which the volt- until V. becomes conductive again at which time the age at C2 passes throug a minimum, for example at voltage across C, and C. decreases then both capaci- the charge transfer poin shown in Fig. 6. tors must again be charged through R.. This The correct time rela ionship may be insured by phenomena results in a longer R-C time since R.C. additions to the electro ic control circuit shown in increases to R,(C. Ci). As a result the time be- Fig. 7. A ripple voltage induced in coil L,is super- tween ignitions of V, increases and the pulse repeti- imposed on the control rid voltage of Vi which in- tion rate decreases. The greater the value of C„ the creases according to an exponential function. The more the repetition rate will be reduced. resulting driving voltage has the waveform shown in Ignition of V. is initiated as follows. Two voltages Fig. 8A. Ignition takes lace periodically at instants are applied to the control grid of V.; a negative bias t„t2 and so on, that is, lmost at the peaks of the developed across the lower part of R„ and a positive oscillatory voltage. voltage from capacitor C, and its leak resistor R.. The It follows from Fig. 8 that when the damping of latter voltage orginates from the alternating voltage the tank circuit oscillat ins increases, the ignition induced in a small coil L4 coupled to tank coil L4 (Fig. 2) and is applied to terminals P and Q. Capac- itor C. is charged to an extent depending on the rate of damping of the tank circuit. This damping is heavy when the generator is loaded; therefore, the positive voltage at C. is insufficient to ignite thyratron V,. When the load is removed the damping is greatly reduced. This action makes the positive charge of C, high enough to ignite V. causing alower pulse repetition rate. Damping can be adjusted by potentiometer Ri. It is possible to choose the value of C, and to adjust R. so that V, ignites only once a second at no-load. As soon as the generator is loaded, the damping in- FIG. 6—Damping oscillation diagrcim showing point at which charge creases, the voltage at C, decreases and V. no longer transfer from C: to C., (Fig. 2) shlsuld preferably take place

54 February 13, 1959 — ELECTRONICS of tube V, is slightly delayed thereby decreasing the +500 V repetition rate. Similarly, a decrease in damping re- IMEG sults in a slightly higher repetition rate. To insure that the repetition rate remains inde- VVN, IMEG pendent of damping variations, the negative bias at 5727 the control grid of V, shown in Fig. 7 is corrected. s>, 330K IMEG

After rectification by the germanium diodes D, and 100 K D„ the oscillatory voltage across coil L, charges 10 K capacitor C. The voltage across C, is now added to the negative 60-v bias. A decrease in damping raises 220 K the voltage across L, increasing the voltage across C, =1,500ge 2.2 K and makes the grid more negative. When the damping decreases (for example, the 60 V load reaches its Curie point) it may be desired to 60m H increase the repetition rate thereby keeping the energy transmission to the load constant. This effect can be obtained by reversing germanium diodes D, 0.15 and D,. L1

The repetition rate ccntrol just described works I.V.Se•d". smoothly even when damping variations are small. L2 However, the control circuit shown in Fig. 5 becomes 8.2 K operative only for a certain minimum value of damp- DI 02 C2 ing at which the repetition rate is suddenly reduced.

EFFICIENCY — Induction heating generator effi- FIG. 7—Circuit used to compensate for fluctuations of repetition rate ciency is high owing to the low losses in the rectifier and thyratrons. Coil efficiencies can reach a value of 90 percent. 17— -- Important design factors are to use conductors of .4" VI sufficient cross section to ensure low operating temperatures and to mount the load as close as possible to the windings of the load coil. It is advisable to equate the stray inductance of the primary and secondary of the coil assembly to that of the loaded coil. Efficiency of the generator, determined by eval- uating the ratio of the load losses to the supplied energy from the power source, was measured with (A) ' a load consisting of an iron cylinder. Though several components were not of optimum quality nor of desired dimensions, 17 was found to be 64.5 percent. Under favorable conditions this value can be expected to exceed 70 percent.

POWER ADJUSTMENT—Power is controlled by adjusting potentiometer R, in the pulse generator shown in Fig. 5 until the desired repetition rate is obtained with the heating inductor loaded. In the standby position when the inductor is unloaded and little damping exists, potentiometer R, in the rate control circuit shown in Fig. 5 can be adjusted to _ . reduce the repetition rate to one pulse per sec. If FIG. 8—Diagram showing influence of circuit damping on ignition the workpiece is then inserted in the heating in- point of tube VI in Fig. 7. Damping in (A) is smaller than in (B); therefore, critical grid voltage v,„, is achieved earlier in (A) ductor, the repetition rate rises to the desired value; when the workpiece is removed, the repetition rate drops to the low standby value. cillator coil of the step-down output transformer is When the damping characteristics of the charged coupled rigidly to the secondary coil to insure high heating inductor changes during the heating-up time, transformer efficiency. A cylinder of polyester in- the repetition rate also changes. To avoid this vari- stead of the customary air dielectric is used to ation, the fluctuation compensator shown in Fig. 7 separate the windings. is used. Repetition rate change during heat-up can Thirty six Ferroxcube rods are mounted along the be attenuated, nullified or even reversed. inner side of the primary to give better coupling CONSTRUCTIONAL DETAILS—The primary os - and to approximately double the inductance.

ELECTRONICS — February 13, 1959 55 Sorting Components By

Speedier and more accurate determination of voltage and current waveform characteristics are obtained using time-sample detector. Amplitude of sampling trigger pulse is compared with combined amplitudes of trigger pulse and of unknown waveform at sample time to get proportional amplitude pulse

By BENJAMIN AGUSTA, Project Engineer, Test Equipment Engineering, International Business Machines, Poughkeepsie, X. Y.

UTOMATIC WAVEFORM DETECTION form, the number of samples re- UUNOWN DIGITAL makes possible high speed quired for waveform definition is WIVEFORM MIXER INFORMATION A AMPL OUTPUT testing of ferrite cores, transistors, equal to twice the product of the transformers or any other elec- pulse width and maximum fre- I---- I [ SAMPLE 1_ STRETCHER- DATA PULSE tronic components that require quency component. CLAPPER I 3ENERA'OR PROCESSOR waveform measurement. This Thus, the detector, which meas- l WAVEFORM method not only eliminates the in- ures the amplitude of a pulse for L DETECTOR UNIT herent disadvantages of the oscillo- the required number of samples, TWG SER STRF'HER READ scope-operator method, but also can determine any physically PULSE PULSE PULSE r{ GENERATOR GENERATOR GENERATOR achieves greater sorting speed and realizable waveform. accuracy. A true impulse cannot be gener- SYNCHRONIZING UNIT ated or handled electronically. How- Waveform Detection System FIG. 2—Automatic waveform detection ever, by compromising and using a sl stem samples unknown waveform and The automatic waveform detec- sampling pulse whose width is neg- converts measurements to digital output tion system operates on the premise ligible compared to that of the un- re ading that the time-dependent voltage or known input waveform, as shown in current waveforms of a network Fig. 1, a close approximation to a response, being limited by a maxi- true impulse can be obtained. This UNKNOWN WAVEFORM STRETCHER mum frequency component, can be compromise is effective for engi- MIXER CIRCUIT defined if their amplitude is known $ •MPLE PULSE -r neering purposes provided the un- TRIGGER at a series of discrete points spaced known waveform does not change 4 4 3LOCKING BASE in time. For a single-pulse wave- OS C magnitude too rapidly during the AMPL TRIGGER CLIPPER sample time interval. [ A block diagram of the system is CATHODE 3LOCKING AM PL shown in Fig. 2. The waveform de- 0S C FOLLOWER tector unit performs the sampling, [

and pulse-stretching and shaping PULSE CATH IN operations. An unknown waveform GEN FOLL OUT

is sampled and the intelligence de- PULSE MIXER- STRETCHER rived is transformed into a reading GENERATOR AMPL CIRCUIT that can be handled by a conventional analog-to-digital converter. FIG. 3—Waveform detector unit changes A synchronization unit is used to amplitude of unknown waveform at sam- 31e time into square-shaped output pulse provide the timing pulses. of proportional amplitude

SAMPLE PULSE Waveform Detector Unit Ilse activating the blocking oscil- WIDTH p A block diagram of the waveform lE tor. The positive output pulse ; T2 TIME detector unit is shown in Fig. 3. A (B) 50-v, 1-,usec sample-pulse trigger a;or nerated which is producesfed to the the pulse sampling gener- from the synchronization unit pulse required by the mixer. FIG. 1—Amplitude of unknown waveform causes the blocking oscillator trig- The mixer circuit accepts the (A) at time T.: determines amplitude of e[ sample pulse (B) ger circuit to generate a special sImpling pulse from the pulse gen-

56 Fobruary 13, 1959 — ELECTRONICS Measuring Waveforms

GENERATED PuLSE

REFLECTED PULSE DELAY

OUTPUT PULSE F.—PULSE WIDTH TIME FIG. 5—Generation of sampling pulse for waveform detector unit

Automatic waveform detection system fib into common rock panel mounts

erator and an unknown waveform, through use of a stretcher pulse pling pulse as close as possible to and converts them into two outputs. from the synchronizer unit. This the mixer circuit. This arrange- One is proportional in amplitude to stretched pulse then passes through ment minimizes lead inductance the sampling pulse; the other is a base-clipper and a cathode fol- and stray capacitance. proportional combination of the lower. Final output of the cathode- The pulse generator circuit uses sampling pulse amplitude and the follower is a square-shaped pulse a delay line made of a length of unknown waveform amplitude at whose duration is established by RG-62/U coaxial cable in a network the sample time. the synchronization unit. The am- configuration. By shorting the end To compensate for various gain plitude of this pulse is proportional of the coaxial cable, a negative re- losses inherent in the mixer-ampli- to the amplitude of the unknown flection of the generated pulse is fier section, an amplifier stage is pulse at the sample time. A schem- provided after a fixed delay. The used to drive the parallel set of atic of the waveform detector unit reflection pulse is used to cut off the cathode followers feeding the is given in Fig. 4. pulse initially generated which re- stretcher circuit. The stretcher cir- The sampling pulse generator is sults in an output pulse of short cuit increases the width of the a-m mounted together with the detector duration, and with sharp rise and pulse by the required amount unit to place the generated sam- fall times as shown in Fig. 5. How-

SAMPLE UNKNOWN SIOK +300V I 10K +150V +300V PULSETRIGGER INPUTWAVEFORM 75K 220K V1/226 5965 270K 36K at 2K o0. 10.01 VIAI/2 5965 00 2.58

1/2 12A17 9IK 100µµF0.01 100K 0.0047 100K 150V CERAMICC3 BLOCKING BLOCKING —1( OSC TRIGGER OSC +300V +130y HO -62/0 +450V 0.01 200K +150V 204 130K 18 Vit INFO 68µµF —1(701 OUT )1 1/2 5965 I5K 450V 0.01 rOOK 1/2 5965 6607 0.1 24K 5965 STRETCHER PULSE GENERATOR MIXER DIFF1/2 AMP2617 FOLLOWERCATHODE PULSE STRETCHER FOLLOWERCATHODE PULSE GENERATOR SECTION K. X1,000 MIXER-AMPLIFIER SECTION STRETCHER SECTION FIG. 4—Size and cost of waveform detector unit can be reduced by using 5687 duo-triodes in p ace of 6AC7 tetrode-connected pentodes and 6AQ5's in place of 6AG7's. Pulse shape and magnitude are not degraded by these changes

ELECTRONICS — February 13, 1959 57 SMALL RC RISE WHEN I0 CAPACITOR IS CHARGED 12AT7 twin triode. The output is THROUGH VIA — INFORMATION_ LEVEL proportional in amplitude to the e difference between the sampling LARGE RC RISE BEFORE 9 CUTOFF OCCURS IN Vie pulse and the sampling pulse plus the unknown waveform impressed 8 on the grids. DELAYED START Signals from the differential am- TIME OF DATA CONVERSION plifier are applied through a degen- CYCLE erative feedback amplifier to the cathode follower circuit. A diode limiter in the cathode POSSIBLE. DELAY OF SAMPLE TIME WITH REFERENCE TO START OF follower restricts the input to posi- SYNCHRONIZATION CUTOFF PULSE tive signal levels. Both halves of FIG. 6—Rise time characteristics of the 5965 twin triode are connected stretcher circuit in parallel to provide a gain close to unity and to supply a low output INPUT WAVEFORM I.-DESIRED SAMPLE TIME impedance. Where only a go, no-go SAMPLING PULSE type test sample is required, the TRIGGER cathode follower could feed a volt- SAMPLING PULSE 90 mja SE Citi 2 age comparator circuit set to the STRETCHER CUTOFF required reference level. PULSE A.-ADJUSTABLE STRE TCHER * (PEAK DELAY RE SULTS INFORMATION Stretcher Circuit INPUT 0.5 µSEC —.1 FROM CIRCUIT DELAYS/ —r BASE 30 .SEC OR GREATER CLIPPER INFORMATION ACTION The stretcher circuit accepts two OUTPUT A.A DJUSTAKE o TIME -10 -95 -9.0 -85 -8o -7.5 inputs: the amplified signal from *REPRESE NTALVE VALUES EIN IN VOLTS the difference amplifier; and a neg- FIG. 7—Waveform detector timing chart. FIG. 8—Waveform detector input-output ative pulse from the synchroniza- Drawing is not to scale characteristics tion unit. Duration of the negative pulse is equal to that time required to operate the data processing de- ever, although the circuit can pro- the sample pulse amplitude. Output vice. duce pulses of 2-miLsec duration, the response of the pentodes is not Tube VIA provides a charging mixer is not able to handle them sharp enough to reflect the cut off path through its effective grid-to- because of interelectrode capaci- of the sampling pulse because of cathode resistance for the ceramic tance and required grid impedance. plate shunt capacitance; therefore, capacitor C, shunting tube V,,,. The A usable 5-miAsec pulse was ob- the output waveform returns expo- amount C, is charged depends on tained by increasing the delay time. nentially to its quiescent condition. the amplitude of the a-m signal The mixer responds to positive from the difference amplifier, pro- Mixer-Amplifier input waveforms of from 0- to 2-v viding 17,,, is cut off. Thus, at the The mixer circuit uses two 6136 peak amplitude. If preceded by an same time the signal arrives from pentodes to perform the sampling inverter, however, the mixer also the difference amplifier, the syn- operation. A negative sampling handles negative inputs. The spe- chronization unit must provide a pulse is applied to the cathodes of cific application for which the wave- negative voltage pulse to cut off both tubes coincidental with the ap- form detector was designed uses a plication of an unknown waveform preamplifier stage having a 5-mv Duration of the synchronization to the grid of one of the tubes. The peak-to-ground noise level. The 2-v unit cutoff pulse determines the tube that receives the sampling full scale operating range provides stretching duration as shown ii pulse at the cathode and the un- for amaximum signal to noise ratio Fig. 6. The cutoff pulse allows C; to known waveform at the grid gen- of 400 to 1. Biasing is used to per- charge to a value proportional to erates a negative-going signal at mit the mixer to operate in the the amplitude of the difference the plate. Peak amplitude of this linear range of its transfer charac- amplifier signal at a rate deter- signal is proportional to the sum teristic to give additive output. mined by grid-to-cathode resistance of the amplitudes of the sampling of VI,and C. When the a-m pulse Balancing pulse and the unknown waveform subsides, V,A cuts off, leaving C, at the time of the sampling pulse. Differences between components charged. Output from the tube to which are adjusted by trimmer capacitors Since the new R-C path formed the unknown waveform was not ap- C, and C_ in the mixer output. The with the output circuit has a long plied is a negative-going signal trimmers permit balancing of the time constant resulting from the

proportional in amplitude to the waveform detector for azero mixer high cutoff resistance of the Vin , sampling pulse. Only the peak am- input signal so that the difference negligible droop of the output sig- plitudes of the mixer outputs rep- amplifier output may be set at zero. nal is encountered. The output resent the sampled intelligence of The difference amplifier uses a voltage, therefore, remains at this

58 February 13, 1959 — ELECTRONICS value until the synchronization cutoff pulse is held on for the period to keep the peak of the input wave- pulse is removed. Removal of the required by the output data process- form signal at less than 3 y to pre- synchronization pulse drives V,. to ing device. Resultant output of the vent the peak from driving the conduction, discharging Cs. detector unit starts at the time that mixer into conduction thereby caus- With no input signal present, the the mixer output reaches the ing distortion of the sampled wave- synchronization unit cutoff pulse stretcher circuit and lasts for a form at the mixer output. It is causes a voltage pulse to appear period established by the stretcher possible to determine an additive across Cs which cuts off V14 for sub- cutoff pulse. Delay of the sample constant voltage needed to shift the stantially the same time V,8 is cut pulse with reference to the syn- transfer curve so that its intercept off. The cutoff pulse causes an inti- chronization unit stretcher cutoff passes through zero. This addition tial voltage increase across 6"; pulse does not affect the level of the may be achieved through the use therefore the output of the pulse information out of the stretcher cir- of a d-c divider network. stretcher circuit is fed to base cuit over the 15 iLsec rang investi- Scale Readings clipper V24 to slice off the voltage gated. Only the rise characteristics increase. of the information pulse is affected If low scale readings are re- The final stage of the detector by delay of the sample pulse. quired, the waveform detector in- unit and the pulse-stretching and put-output characteristic can be Performance shaping circuits is cathode follower adjusted to have readable output V,.. Output of this low-impedance Transfer characteristics of the information from zero input volt- driving source is tapped from a waveform detector unit were meas- age. This is done by adjusting the potentiometer to allow for range ured by simulating an a-c input —10-v bias on the grid of the mixer adjustment to suit the individual through a change in mixer bias. tube accepting the unknown wave- needs of the data conversion or As shown in Fig. 8, the character- form input to a more positive value. processing device to be used. istics when the mixer bias is varied The adjustment of this bias must from —10 to —8 y show an ac- be of sufficient magnitude to cause Timing Considerations curacy of at least 5percent at every an unbalanced pentode amplifier Relative timing established by point on the curve down to the re- output voltage to operate at the the output of the synchronization gion of 0.5-v input. start of the linear transfer char- unit for a time sample operation is Information out resulting from acteristic of the stretcher. shown in Fig. 7. The timing opera- inputs of 0.3 to 0.5 y deviates from Figure 10 gives the waveform tion allows a sample to be taken at a straight line by a large per- detector input-output characteris- any point on the input waveform. centage; therefore, these points tics with the d-c bias adjusted so Adjustment of the sample pulse must be precalibrated for use. All that a fixed 4-v pulse feeds the in- trigger in time is done in the syn- inputs of 0.3 I/ or less are clipped put of the stretcher with zero input chronization unit; however, initia- at zero by the action of the base waveform and the base clipper tion of the sample pulse trigger clipper to eliminate the nonlinearity properly adjusted. The method has must occur approximately 90 mi/sec of the stretcher circuit at low input the disadvantage of partially can- before the desired sample time. voltage as shown in Fig. 9. celing the effect of the balanced After being initiated by the sam- Since the input stage of the mixer mixer circuit which stabilizes vari- pling pulse trigger, the stretcher is biased at —10 v, it is necessary ations in the sample pulse magnitude. Any loss of stability results from the fact that the character- 6 istics of the mixer pentodes deviate increasingly from the balanced null point. However, it has been experi- mentally determined that the decrease in stability of the prototype waveform detector unit using this bias offset method is not appreci- able. 5 10 15 20 25 30 35 90 45 50 STRETCHER INPUT IN VOLTS Application FIG. 9—Stretcher circuit transfer characteristic is clipped to eliminate nonlineari. The prototype automatic wave- ties in the circuit form detection system has been in reliable use for 1 years in aferrite core sorting application. In general applications, the system could provide great economic savings to any aspect of the electronics industry .-9.7 -9.2 -8.7 -82 FIG. 10—Waveform detector input-output -7.7 in which waveforms of components characteristics using bias offset method E15 IN VOLTS must be determined.

ELECTRONICS — February 13, 7959 59 Special-Purpose Magnet

Electronic component designers faced with space limitations, extreme temperatures, corrosive environments or special manufacturing problems can choose from these special magnet wire insulations

By GEORGE SIDERIS, Associate Editor

TABLE I—Magnet Wire for Special-Purpose and High-Temperature Uses

ENAMELED AND Temp. Dielectric Flexi- Stretch- Varnish Abrasion COATED Class Strengtha bilityb ability. Corn- Resist- Remarks on Application (' C) patibility ance

Nylon 90-105 high good good fair good Solderable without stripping, also applied over polyvinyl-formal to resist solvent craze Self-bonding Formvar., 105 high good good good To fabricate odd-shaped coils without varnish; cure with heat, solvent, resistance Polyurethane 105 high good good good good Solderable without stripping; good chemical, moisture and corona resistance

Epoxy-based 105-130 high good good good good Good space factor, chemical, corona and moisture resistance; thermosetting Polyesters 130-155 high good good fair good Moisture a problem, usually requires pot- ting; chemical resistance good Acrylic. 130 high good good good Major uses in tv yoke coils, hermetically sealed motors; low moisture resistance Silicones 155-180 high good good silicone good Use silicone varnishes; good space factor; tends to craze upon curing Silicone-ceramic 180 high fair fair silicone fair Must be carefully wound to prevent damage to insulation Teflon 180-220 high good fair poor fair Chemically inert, poor varnish adherence unless treated; also tape-wrapped Teflon-ceramic 220 high fair fair poor fair Teflon protects ceramic base, adds flexibility, but tends to tear

Teflon-silicone >220 high good good poor fair Silicone enables use of clad wires for higher temperatures Anodized aluminum . >220 low poor poor fair Cracks easily, is porous; insulation thinness assists space factor Ceramic. >220 low fair poor fair Difficult to handle, temperature rating raised by baking out binder

Flexible ceramic >"›.20 high good good Not a true ceramic; stretchability depends on conductor, rated over 500 C

FIBROUS INSULATION Are used when high cut-through strength is needed or when long service at elevated Glass-Formvar 105-130 medium fair fair good fair temperatures will drive out binders. They Glass-organic 130-155 low poor poor good fair are generally reliable at high temperatures Glass-Dacron 130 low fair good good good >due to spacing provided by the glass. Care Glass-silicone 180-220 low fair fair silicone fair must be taken that fibers are not stretched Glass-Dacron-silicone 180 low fair fair good good or twisted during winding. Interwinding and subsequent temperature fusing of Dacron fibers largely overcomes fraying and flexibility problems

In Awg 25-30: a > 1,000 v/mil: high b <5 X dia, bend: good ° >20% elongation: good 500-1,000 v/mil: medium 5X-10X dia, bend: fair 10-20% elongation: fair <500 v/mil: low >10 X dia, bend: poor <10% elongation: poor

60 February 13, 1959 — ELECTRONICS Wire Insulation

OLEORESINOUS ENAMELS, polyvinyl formal and proc- TABLE 11—Approximate Space Factors essed natural fibers are the magnet-wire insulations

conventionally used in the great majority of elec- INSULATION Awg Size tronic equipment. These insulations are low in cost 18 22 26 30 36 40 and provide reliable insulation at service temperatures up to 105 C. Single enamel 74 72 70 69 67 67 During the past decade, wire and insulation manu- Heavy enamel 70 66 63 60 55 55 facturers have developed many types of magnet wire Single silk-enamel 67 63 56 48 35 29 insulations which are reliable at temperatures over Single cotton 65 56 49 40 25 105 C or satisfy special manufacturing requirements. Single cotton-enamel 60 53 43 33 20 15 Single glass 65 55 49 43 27 A number of these are described in Table I. Single glass-enamel 55 46 37 27 15 Only general characteristics are given because the Single silicone-ceramic 74 74 73 69 60 56 properties vary with formulation, insulation thick- Single Teflon 73 71 69 66 63 62 ness and wire size. Insulations can be upgraded in Ceramic-single Teflon 74 74 73 69 62 58 temperature rating after varnishing or impregnat- Bare copper wire 78 78 78 78 78 78 ing. When life expectancy is short, further upgrad- ing is possible, as shown in Fig. 1. Dielectric strength deficiencies are often overcome by impregnants and other supporting insulation. The been solved by application of adhesive coating to enamel. The adhesive is fused by the application of other properties determine the amount of care a solvent or heat. Nylon and polyurethane-coated required during manufacture of a component. wires can be dip-soldered without stripping. The Even when wire-wound components are not in- coating melts at soldering temperatures. Certain tended for high-temperature environments, high- polyvinyl-formal based enamels are also solderable. temperature insulation is sometimes necessary to offset overload, avoid the necessity of dissipating heat or prevent damage from soldering. The net INORGANICS—An advantage of the inorganic fiber result is often savings in space and weight. coated wires is the positive spacing which the insulation provides between turns. Even if the bonding ENAMELS—Wires covered with enamel-type insu- material is destroyed by long exposure to heat or lations are used whenever possible because of their chemical action, the inorganic material can keep space factor (ratio of copper section to coil section the turns separated. Glass and asbestos are widely occupied by the wire as shown in Table 2), their used, although asbestos is not applied to extremely high dielectric strength and their availability in fine wires. the small wire sizes. Enameled wires are usually Anodized aluminum wire is now being mass- easy to wind in tight and unusual shapes because produced. The coating retains its insulating prop- there is little likelihood of the coatings opening on erties almost to the melting point of aluminum. sharp bends. However, the coating is porous and cracks when The problem of unsupported coils opening up has bent, so must be treated as a spacer-type insulation. The oxide can be overcoated with a more flexible material. The coating is hard enough for automatic winding, but difficult to remove for soldering. Aluminum's lower conductivity imposes a space penalty, partially recaptured by the thinness of the oxide coating. A good deal of development is being done in aluminum foil coils insulated by coatings or capacitor-type layer insulation. Substitution of aluminum, clad copper or silver Là_ for copper conductors is a promising method of getting higher temperature performance out of in- CC organic insulations. Opening of the insulation by 1,000 oxidized copper is avoided. In one study made for the Air Force, glass-served nickel-clad copper wire, Awg 28, had an insulation resistance of 3.2 megohms after 1,000 hours at 600 C. Awg 28 glass on silver showed 53 megohms 100 and anodized aluminum, 174 megohms under the 100 150 200 250 300 TEMPERATURE IN UGC same conditions. The glassed wires were treated

FIG. 1—High temperature life of magnet-wire enamels also with silicone resin.

ELECTRONICS—February 13, 1959 61 Digital System Positions

Unique modulator superimposes digitally encoded master shaft positions on a carrier, mixes modulated signal with necessary control data and transmits com- posite signal at 750 bit-per-sec line rate. Novel agc amplifier and demodulator reforms original signals which are then compared with digitally encoded slave shaft positions. Differences are converted into analog correction signals

By R. B. PALMITER,* Chief Electronics Engineer, Electronics Division, American Machine and Foundry Co.

RIME COMPONENTS of the shaft A data frame describing three signals to the approximate Gaussian pposition data set system dis- shaft positions consists of 64 bits waveform shown in Fig. 1. cussed here are a transmitter, a which are divided into four 16-bit Transmitter voice-bandwidth telephone line and words as shown in Fig. 1. The a receiver. Data describing the first word is further subdivided into A block diagram of the trans- position of three master shafts as two parts: synchronizing data con- mitter is shown in Fig. 2. A master well as all necessary synchronizing sisting of a series of six ONES fol- clock in the programmer generates and auxiliary information are gen- lowed by a ZERO and another ONE; the 48-kc trigger pulses used for erated in the transmitter. These and auxiliary data consisting of internal data processing and in the signals are then multiplexed into eight bits set in manually at the count down stages from which the the phone line and sent to the transmitter control panel. The re- 1.5-kc carrier, the 750 bit per sec line data shift pulses and various other reset and trigger pulses are derived. The programmer also con-

SYNC AND AUX WORD SHAFT IPOSITION WORD —1,1*-- SHAFT 2 POSITION WORD SHAFT 3 POSITION WORD trols the 600-cps ready signal pro- SYNC DATA -•-•.-AUX DATA duced by a gated oscillator in the 8 BITS 8 BUS 16 BITS 16 BITS 16 BITS modulator unit. Internal programming of the shaft 1 encoder takes place at the ONE ,SYNC READY BIT 48-kc rate, during the 1.33 millisec SIGNAL SIGNAL, required for the 16th bit in the synchronizing and auxiliary word to be presented to the line through • the adder and modulator. A reset pulse starts the program by clearing FIG. 1—Data frame (A) describes position of three shafts in binary numbers. Sync and the data register, zero set register ready signals are shaped to eliminate noise-producing high-order harmonics and carry trigger pair in the adder. Then another trigger pulse remotely located receiver which maining three words each describe flashes the strobe lamp in the shaft converts the data into slave shaft a shaft position to one in 2' parts. 1encoder which generates shaft pa displacements corresponding to the These data are transmitted on a sition information and reads it into master shaft displacements. 1.5-kc carrier at a communications the register in parallel, cyclic form. Digital data handling circuits line rate of 750 bits per sec. The strobe trigger pulse is also used in the system are conventional, Also transmitted is a 600-cps routed to a shaft 1 zero set switch hence are not described. Bistable ready signal indicating initiation of bank consisting of 16 miniature multivibrators and nonreturn-to- a new data frame. This signal toggle switches, each of which cor- zero logic are employed throughout appears in 4-millisec bursts begin- responds to a bit in the shaft posi- the system. Except for trigger cir- ning concurrently with the start of tion number. Zero correction data cuits and power supply, the entire the synchronizing signal. To avoid is manually set on the switch bank system is transistorized. transmission of high-order harmon- from which it is automatically ics on the low-bandwidth line, filter read into the zero set register. • Now with Electronics Corporation of America. circuits shape both data and ready Immediately following read in,

62 February 13, 1959 — ELECTRONICS Shafts Over Phone Line

TRANS- SHAFT I SHAFT 2 SHAFT 3 LATOR ENCODER ENCODE ENCODER

4.1 CO, 4 tr, w- >x DATA Luo., REGISTER OUT- TRANSMITTER FORWARD j SHIFT PUT ADDER MODULATOR PROGRAMMER TO LINE ZERO SET REGISTER

READY TRIGGER

SYNC AND SHAFT SHAFT 2 SHAFT 3 AUX DATA ZERO SET ZERO SET ZERO SET

Engineer weppres to insert card bearing two encoder stages into FIG. 2—Transmitter provides zero setting feature enabling operator to couple encoder to its driving shaft at any required angle switch bank .on evaluation model of shaft position data set system a sequence of sixteen 48-kc pulses munications line through the modu- bank. Since no data register pulses shift the cyclic shaft number, high- lator. occur during this period, the syn- order digit first, out of the data Information sets for shaft 2 and chronizing and auxiliary data pass register, through the code trans- 3 are processed exactly as described through the adder to the line with- lator and back into the data register. for shaft 1. Synchronizing and out modification. This operation converts the cyclic auxiliary data for the next frame Since the modulator is peculiar number read out of the shaft-posi- are introduced during the 16th bit to the shaft position data set and tion encoder into a binary number interval in the shaft 3 data word. contains unique circuits, a detailed which can be arithmetically com- The synchronizing and auxiliary discussion of its design follows. bined with the zero-set correction. word is read in using the same tech- Modulator The internal program described niques, but the encoder read-in above takes place at the 48-kc data pulse, the code translation shift Modulation and mixing of the rate. After transmission of the syn- pulses and the data register line 1.5-kc data carrier and the 600-cps chronizing and auxiliary word, the shift pulses are omitted. Syn- ready signal are accomplished with shaft 1 information is transmitted. chronizing data are read into the the circuits shown in Fig. 3. A This is accomplished by simultane- low-order half of the zero set regis- 1.5-kc square wave from the appro- ously shifting translated encoder ter electrically; auxiliary data are priate programmer counter stage data and zero set data through the read into the remaining high-order is fed to complementary symmetri- adder at the 750-cps line data rate. portion of the same register cal emitter-follower pair Qi and (12.- Their sum is presented to the com- through a manually operated switch These transistors drive a moder-

BALANCED MODULATOR

600 en MOO LEVEL AN

ISOLATION PHASE PUSH-PULL CIRCUITS LEVEL CONTROL SPLITTER OUTPUT AMPLIFIER

FIG. 3—Modulator presents 600-ohm balanced-to-ground impedance to phone line. Collector-to-base feedback stabilizes output of push-pull amplifiers Q18 and Cho. Potentiometer RI controls the balance of the 1.5-kc cps modulator

ELECTRONICS — February 13, 1959 63 to that described for the 1.5-kc INPUT modulator. FROM ADDER ZERO I REGISTERERROR POSITION- The 1.5-kc data and the 600-cps PHONE SET AND ING ready signals are passed through LINE REGISTER DECODER MECHANISM isolating emitter-followers Q,, and SHAFT ONE SERVO Q., and individual level control ad- ANDAGC SHAFT -0 justment potentiometers R. and R„, DEMODULATOR IZERO SET DATA ERROR POSITION- respectively, to a common summing REGISTER REGISTERAND ING -- ENCODER point. Line level adjustment poten- RECEIVER SHAFT DECODER MECHANISM tiometer R, combines the signals PROGRAMMER ZERO2 SET SHAFT TWO SERVO and applies them to divided-load phase splitter Q,, which drives push- CODE ERROR POSITION- pull transformer-coupled amplifiers AUXILIARYREGISTER ZERO3SHAFT SET TRANS-LATOR REGISTERDECODERAND MECHANISMING ENCODER re! Q,„ and Q,... Receiver L SHA THR SERVO A block diagram of the shaft FIG. 4—Receiver shafts are set by transistorized version of conventional tachometer- position data set receiver is shown stabilized servo. Frame length and line data rate establish shaft position sampling rate in Fig. 4. Information from the at 11.7 cps phone line enters the demodulator and passes through an age amplifier ately high-Q circuit tuned to 1.5 kc first three line bit intervals in the which has 20 db of dynamic control which shapes the input square wave data frame. Dual logic-level gating over a selectable total range of from into a 1.5-kc sine wave. The shaped waveforms defining each of these 0 to —36 dbm. Filter circuits signal is then passed through emit- bits are derived in the programmer separate the 600-cps ready signal ter-follower pair Q. and Q, to a and combined in the modulator mix- and the 1.5-kc data carrier. These balanced modulator. ing circuits. Diodes D,through D. signals are then rectified and shaped Logic levels from the adder are form a 4 millisec gate which shock to restore the original square wave applied to the balanced modulator excites a 600-cps parallel resonant form of the modulated information through two isolating emitter fol- circuit through the complementary introduced at the transmitter. lowers Q, and Q.. Use of a balanced symmetrical transistor pair Q. and A synchronizing circuit in the modulator avoids d-c level shift in Q.. The output of the tank circuit receiver programmer detects the re- the output line signal caused by passes through emitter-follower shaped ready signal and checks for components of the modulating data pairs Q„ through Q„. These tan- the presence of a synchronizing sig- wave train. dem-coupled stages provide a high nal. After performing the syn- After being modulated, the sine impedance across the tuned circuit chronizing operation, the receive- wave passes through another isolat- and assure sufficient isolation be- programmer emits a series of eigl.. ing emitter-follower pair Q; and Qs tween the output and the input at pulses which shift the auxiliar.,' to a parallel resonant circuit tuned the point where feedback to the data into the auxiliary data reg- to 1.5-kc. This filtering device im- capacitance divider on the tuned ister. The register makes the presses an approximate Gaussian circuit is derived. This feedback auxiliary data available through wave form on the modulated line improves the wave form of the 600- relays by providing parallel outputs signal thus significantly reducing cps signal and will, with the proper to a set of eight relay amplifiers. the harmonic content of the trans- selection of the feedback factor, Time constants in the relay ampli- mitted signal. maintain a constant amplitude sine fier circuits are adjusted so that the Duration of the 4 millisec ready wave. Finally, the ready signal is relays will respond to changes in signal is exactly equivalent to the applied to a Gaussian filter similar data at any low rate, but not at the INPUT +20V NoRszi 1, TP1 _L--"An.-0R,I3K TEST 32 200 201 5,6K 68K I3K 24K 0.033C1 I 0.1 . 3.9K 0.22 39K 3.9K0.22 5IK 0.2H =. 0.01 0 0.22 6H 09 °IC , 0.211 0.1 02 2N94 820 2N94 2N94 T' . 70.1 S 0 4 0.1 39K 2N94 33K •--1( I.1-.' 2N94 0.1 0.1 2K 33K INPUT r 1-1 27K 20K SEL 20 20— IK 27K 27 KT • • •=r AGC AMPLIFIER READY SIGNAL DEMODULATOR FIG. 5—Gain of the agc amplifier must be adjusted to give a constant output within -±-1 db for a 20-db variation of input signal. This is gain between input from switch SI and outputs at collectors of 01 and Q., respectively, is obtained. When the output voltage measured across

64 February 13, 1959—ELECTRONICS 750-cps line data rate. a —36dbm minimum input signal emitters returned to ground, hence Throughout reception of the syn- level to gain-controlled amplifiers they are virtually cut off. Since Q. chronizing and auxiliary word, no Qi and Q3. Transistors Q3 and. Q, and Q„ are driven in parallel from shift pulses are provided, hence, no serve as emitter resistors whose the two phases of inverter Q„, the information can enter the data effective resistance varies as a func- full wave rectified output appears register. During the time interval tion of the age voltage applied to across C,. Noise is eliminated by required to handle the 16th bit of the bases of Q, and Q„ respectively. Q„ which has fixed emitter bias ap- the synchronizing and auxiliary The amp1ified signals are then applied through resistors R. and R.,. word, all registers and the carry plied to conventional fixed-gain By biasing Q„ somewhat below cut- trigger pairs in the adder are stage Q-, used to drive parallel- off, noise near the reference level of cleared, the shaft 1encoder position coupled emitter followers Q. and Q, the rectified output is removed. read into the data register and which feed the 600-cps ready signal Output from Qi3 is applied to translated, and the zero set shaft 1 and the 1.5-kc data channels. Schmit trigger circuit QH and Q15 number read into the zero set A 600-cps low-pass filter in the which restores the rectified ready register. As the shaft 1position word is re- READY + SIGNAL 6KC ceived, it is shifted through a four- input adder which accommodates CKT READY IN MODULO 22 the three primary numbers and the TRIGGER AND AND AMP COUNTER DIFF PAIR generated carriers. After the 16th OR CKT bit in the shaft 1 position word has SYNC SIGNA been received, the difference between the transmitted shaft position 1 SYNC I IN and the actual receiver shaft posi- TRIGGER tion is stored in the data register. AMP DIFF I PAIR CKT This digital error is then shifted, in parallel, to the seven-bit shaft 1 64TH BIT PULSE error register which drives a seven- FORWARD SYNC 2 FORWARD stage digital-to-analog decoder. The -OP SHIFT MODULO 8 AND SHIFT TRIGGER AND TRIGGER —11a COUNTER PULSES decoder develops an analog error PAIR PAIR signal sufficient to position the shaft 1 servo until the error is 6 KC reduced to zero. FIG. 6—Receiver synchronizer circuits tolerate a 4-millisec ready signal delay as com- A similar sequence of events takes pared with the synchronizing signal and provide a high degree of noise discrimination place for the shaft 2 and 3 position words. Storage of the error signal signal to a square wave form. from one data frame to the next is ready signal demodulator channel In the case of the data signal de- provided by the seven-bit error removes the 1.5-kc data carrier com- modulator channel, the 600-cps com- registers, which are more accurate ponent from the line signal. Emit- ponent of line signal is removed than are holding circuits for the ter-follower Qo provides a high load from the data channel with a 1.5-kc analog error signal. impedance across the filter while driving amplifier Q„. The amplifier band-pass filter. Circuits contain- AGC Amplifier and Demodulator output is then fed into split-load ing transistors Q,. through 62,0 A schematic of the age amplifier phase inverter Q,O. Each of the two correspond identically to those con- and demodulator circuit is shown output phases of Q, 0 drive a col- taining Q, through Qu, respectively, in Fig. 5. Switch S, permits man- lector-detector. Both detector stages in the ready signal demodulator. ual selection of either a —20dbm or Qii and Q„ have their bases and The output of detector stages Q19

READY 0.022 10K I5K 33K SIGNAL 11K 330K iD.0016

11‘1v.43K 2N94 00 •—"JVhf. 900 33K 2N3I5 MH 2N3I5 0.0033 Q20 0.0016 2N24IA Oie 2N94 I( 0.0016 2N24IA 0.01 1H T-0.0016 2N94 0.015 33K 5.IK 7H 2N315 15N — 0.1 IK b2K 0.047 2O2.4K1 10K 2N315 0.015 0.01 DATA DATA SIGNAL DEMODULATOR SIGNAL done by placing switch S. in the TEST position, applying an external bias of 13 volts at test point TPi, and adjusting R1 and Ra until unity dummy load R-, equals the externally applied bias, the correct age has been established

ELECTRONICS — February 13, 1959 65 and Q, is applied to a twin-T filter, pulse AND gate. Therefore, a train shift pulses for the data register tuned to 3-kc, which removes the of 6-kc trigger pulses derived frchn at 750 cps. rectified component of the carrier the receiver programmer trigger The modulo 8 counter and the frequency. After passing through the modulo 22 counter. This con- forward shift trigger pair are pre- fixed gain stage used to com- tinues for 3.67 millisec out of the 4 set to a count of four by the last pensate for the filter insertion loss, millisec that both ready and syn- pulse, or 64th bit, in each frame. the signal is applied to clipping chronizing signals are simultan- Since the counter starts its opera- ainplifier Q.. Output from Q. actu- eously present at the receiver input. tion on the first 6-kc clock pulse ates Schmitt trigger circuit Q. and These pulses are also used to reset after the start of the eighth bit Q„ which restores the rectified data the synchronizing trigger-pair in interval in the synchronizing signal, signal to a square wave form. preparation for the subsequent syn- the forward shift pulses derived as The agc voltage is derived from chronizing signal check. described must lie within +0 to the 3-kc rectified carrier at a point Output from the counter stage —it bit of the center of the incom- just ahead of the twin-T filter and enables the AND gate to pass an- ing line-data bit intervals. This applied to emitter-follower detector other 6-kc pulse for resetting the synchronizing operation is repeated Qv. To achieve a high impedance ready trigger pair through an OR for every 64-bit frame; therefore, across the detector load capacitance, gate, for resetting the counter and the receiver data sampling pulses the carrier is applied to emitter- for turning on synchronizing trig- will occur well within each line data follower stage Q. which is followed ger pair number 2. bit interval. Precise master clock by complementary emitter-follower Use of this counting arrangement oscillators at both transmitting and 6):,. and Q. whose output is the age provides a simple means for dis- receiving locations are not required. control voltage. criminating between a true ready signal and noise on the ready Decoder Synchronizer channel. Valid results are obtained Receiver shaft position error is To eliminate necessity for con- regardless of relative ready signal transferred from the data register tinuous synchronization between transmission delay with respect to to a seven-bit error subregister and transmitter and receiver, the line synchronizing signal, so long as the converted to an analog error signal shift program and, therefore, the ready signal lies somewhere within by the seven-stage decoder shown receiver's internal data processing the first 6-bit interval of the syn- in Fig. 7. Since all seven stages program, is started at the beginning chronizing signal. function identically, only the stage of every data frame. This synchro- When aready signal is present, it with 2° — a logic-level input will be nization is accomplished by the sys- is followed by the ZERO and ONE discussed. tem of digital logic shown in Fig. 6. sequence in the last two bits of the If the input logic level is high, Synchronizer inputs are the de- synchronizing signal. The appro- the output of Q, is low, Q, is cut tected and reshaped synchronizing priate output phase of the syn- off and Q„ conducts. Current then and ready signals from the age chronizing inverter-amplifier is flows from the —6-volt supply amplifier and demodulator. Each differentiated and the transition through D, and Q. to the —10 volt input signal enters an inverter- used to turn on synchronizing trig- supply clamping the junction point amplifier which reshapes the trans- ger pair number 1. Inputs from between D, and D2 at —6 volts. mitted Gaussian modulation envel- synchronizing trigger pairs number Conversely, if the input level is low, ope to a rectangular waveform. 1and 2to the AND gate enable a 6-kc Q. and D, are cut off and 6L con- When the ready signal is received, clock pulse to set the forward shift ducts. Current then flows from the a trigger pulse is derived from the trigger pair and to reset syn- +10 volt supply through Q, and D, OFF to ON transition of the ready chronizing trigger pair number 2 to the +6 volt supply clamping the inverter-amplifier and is used to set which then turns off the AND gate. junction point at +6 volts. This the ready trigger-pair. The output The forward shift trigger pair per- action determines the output polar- from this trigger-pair and the out- mits the following AND gate to pass ity. Magnitude of the output cur- put from the synchronizing signal 6-kc pulses which trigger a modulo rent is established by the value of inverter amplifier form the two con- 8counter. A pulse generator driven weighting resistor R, which is tied trolling inputs to the following by the counter produces forward to the common summing point for all decoder stage currents. Potentiometer R., provides a bias

21-0 22-0 23-0 24-o 2e-o 26-o adjustment to compensate for two independent phenomena: the unit error which arises from certain I5K II( combinations of input values sent to the adder and the quantized nature 32K I6K of the error signal. The author acknowledges the 20V -10V 6V L. OUT guidance of J. Buegler, the efforts

FIG. 7—Decoder output voltage is a direct function of both sign and magni ude of the of J. DeClue, R. Dolbear, W. Fenter, digital input number for either positive or negative numbers. Low impedance offered by R. Leighou, H. Nagle, R. Young common junction point of weighting resistors permits accurate summation and H. Zitzow.

66 February 13, 1959 — ELECTRONICS Tailor-Made Ferrites

Wide-ranging magnetic properties of ferrites allow their use at frequencies from d-c, in motors, to microwave. One common advantage is high resistivity

FERRITES are one of the few basic materials created TABLE II-Typical Applications of Ferrites for electronics. Except for permanent magnet types, ferrites are used almost exclusively by our industry. Ferrite Frey Initialµ Components In addition to nickel, zinc, manganese and mag- Mn-Zn 15-100 kc >750 fFlyback transformers, nesium, other materials such as copper, cobalt and Ni-Zn f 'deflection yokes cadmium, with divalent ions, can be used to form • Mn-Zn 5-500 kc 1,000 Wideband trans- ferrites. Combinations of trivalent and monovalent formers ions can be substituted for divalent ions or atrivalent Mn-Zn tolmo >1,000 Pulse transformers, ion can replace part of the trivalent ion in the ferrite. inductors Addition of cobalt, for example, will narrow the ' Mn-Zn to 15 me t,soo Wideband trans- hysteresis loop while copper reduces dielectric losses. formers Aluminum will cut down saturation magnetization Ni-Zn 15-100 kc >3,000 Pulse transformers, small coils while rare earths provide the narrower resonance 100-500 kc 2,500 Filter inductors, wide- line widths desired in microwave ferrites. 10 ke-2 mc 500 band transformers, Table Iindicates the wide ranges of values reported Ydn 1-15 me 50 'mall coils, antennas, for the most commonly used ferrites and Table II 20-50 mc 15 cup cores, magnetic 50-100 mc 7 amplifiers gives general uses. There are about 100 other vari- high frequency induo- ables and constants which can be used to describe the • Ni >25 me 50 tors, tuning plugs, properties of ferrites, or ferrite components. }attenuators, modulators and switches Mg-Mu pulse Memory cores, switch- PROPERTIES—But while the properties can be ing. mag. amps. varied widely, choice of values is more restricted. Ni ' Magnetostrictive Transducers, filters, As permeability rises, for example, Q and Curie Ni-Zn Properties delay lines, oscillators temperature may drop. Hexagonal ferrites have re- Ba Permanent magnet Magnetostrictive Properties traveling wave tubes, tained a permeability of 10 to a frequency of 1,000 loudspeakers mc.—G.S.

TABLE I-Properties of Ferrites Developed for Electronic Applications

Initial Maximum Sat. Flux Residual Coercive Resistivity Curie Ferrite Class Permeability Permeability Density Flux Force (ohm-em) Temp (gauss) Density (oersted) (°C)

Ni-Zn' 7-6,000 200-12,000 1,750,4,200 500-2,400 0.04-14 10-107 70-600 Ni-Zn (stressed)".... 2,500 37,000 1,870 1,460 0.03 70 Mn-Zn' 500-2,500 1,500->2,500 3,300-5,100 1,100-1,200 0.1-0.5 20-100 100-210 Ni 15 100 2,500 1,400 14 106 585 Mg-Mn" 40-50 350-1,800 1,600-2,250 1,530-2,150 0.65-2.5 >106 150-300 Ba (isotropic)" 1,800-2,100 1,600-1,750 106 450 Ba (oriented)e• 3,100-3,900 1,600-2,000 2 X 1CM 450

Hysteresis Eddy Current Magnification Factor (i4Q) Sat. Magne- Ferrite Class Coeff Coeff (X 10-°) tostriction (X 106) (X 10°) 10 kc 100 ke 1,000 ke 10,000ke (X 106)

Ni-Zn 3.6-50 0.1-3.5 7.5-50 7.5-30 1.8-12 0.2-5 -4 to -22 Mn-Zn 1-1.6 0.3 300-500 150-200 9-10 0.05 -0.5 Ni 50 0.1 2-3.8 2-3.2 1.6-2' -25

•Values depend on proportions of prime materials and/or other oxides added

b Square B/II loop Permanent magnet materials d BH. is 0.8 - 0.95 X 106 •BIT. is 2.75 - 3.5 X 106 f500 at 50 me

ELECTRONICS - February 13, 1959 67 Close frequency control of transmitter and receiver local-oscillator klystrons in a six-kmc microwave link is achieved using magnetic amplifiers and transistors. Overall system is for use in toll telephone and similar services handling up to 240 voice channels over a few miles

By MAURICE C. HARP, Lenkurt Electric Co., Inc., San Carlo:, Calif.

Nonvacuum Devices

EFLEX KLYSTRONS are well es- the frequency are two main prob- watts continuously. Voltage/fre- R tablished as reliable and eco- lems. Frequency pulling is basic to quency control characteristics of nomical sources of microwave the tube because operation is de- the reflector are about five times power. In critical applications, pendent upon an electron-beam drift more sensitive than the resonator. maintaining accurate and reliable time. This, in turn, is established The power-supply arrangement sup- frequency control with these tubes by the potentials applied to the plies the resonator through a nomi- has been a problem. resonator and particularly the re- nal amount of regulation. Aging and thermal drifts of the flector (repeller) element. L-C oscillating tank (in this case, a The six-kmc microwave link un- Magnetic-Amplifier Regulation cavity internal to the tube) and the der discussion uses a VA-222 power Figure 1 shows how the basic fact that operating potentials pull tube which must dissipate some 60 magnetic-amplifier regulator is connected to supply several rectifier circuits. Rectifiers with associated filter circuits are connected in series to provide various voltages required by the klystrons. In the schematic diagram of Fig. 2, the main regulation magnetic amplifier is identified as MA -REG. Two separate Deltamax cores with identical windings operate through gating diodes on alternate half- cycles to provide full-wave operation. Load current at the start of each half-cycle is small because of the large reactance of the amplifier winding. As the flux in the core reaches saturation, the reactance drops drastically, gating the load current full on. The magnetic gating action is called firing because of the similarity to the action in thyratron control operation. While one core is operating to supply power to the load, the opposite core is being reset. A small Transmitting klystron being tuned in one transmitter-receiver of a diversity pair. At right current flows through the 1,000-ohm center is the discriminator, framed by waveguide, with the cylindrical cavity above it resistor, shunting the diode gate.

68 February 13, 1959 — ELECTRONICS TRANSMITTER TRANS- CONTROL FROM (4) 400-e TRANSMIT ER KLYSTRON MITTER 3-1N540 TRANSMITTER RECTI- KLY YRON TRANSMITTER DISC DISC AFC 300H (—^—% FIER ..e5OV IAAGAMP -11201 -750V

111 V IAAGAMP 450 V - 100K KM RECTi- ei2! JREGULATOR Go cps FIER NEC 00K -e-1 AFC CONTROL AMP 300-V 620K RECTI- NEC -300V FIER ELY RON

-300V W -400V (4) 300K 003 REC 4-11040 — MSC 6H 6H --=. 300K FIG. 1—Block diagram showing stacking arrangement used to obtain the various 117VAC 700 +T700 regulated voltages +10% 141 SEC 3-IN540 6H 100K AFC 60CPS 614

10K 100V .11..••••

-300V -400V FIG. 2—Schematic diagram of the power 700 10K supply including the transmitter afc mag- T+ REC netic amplifier K.X ipoo KLYSTRON Control Klystrons

This current shifts the core flux 0.5 sec. This surge regulation is sary to cancel frequency-pulling away from the saturation state achieved by a combination of three- effects resulting from line-voltage where it was left at the end of its cycle magnetic-amplifier attack variation. One of these windings conducting half-cycle. Any increase time plus a large energy storage references the repeller voltage back in supply potential causes the reset factor in the rectifier filters. to the resonator potential via a action to move the starting point The repeller supply voltage for bridge arrangement. Changes in of the following conduction half- the transmitter klystron is subject resonator voltage tend to cause like cycle further from saturation. It to further regulation by a second- changes in repeller voltage through is this variable conduction time ary magnetic amplifier designated the magnetic-amplifier control. The which provides the regulating normal condition for this winding control to the magnetic-amplifier is zero control current with nominal output. a-c line voltage. To further enhance the regula- The second winding passes a con- tion, control windings have been tinuous bias current which operates added which are connected back to to reset the cores during their off a bridge using two OD3, 150-v reg- cycle. Since the source of bias cur- ulator tubes for reference. As long rent is an unregulated rectifier, as the rectifier output is exactly changes in a-c line voltage provide 300 v, the bridge is balanced. Any a change in bias which over-regu- direct-voltage change unbalances lates the repeller voltage. The the bridge delivering current to the amount of over-regulation is set on control windings of appropriate a 100,000-ohm control as part of polarity to shift the firing point of initial line-up. Sudden changes in the cores toward correcting the source voltage are integrated by error. the 10-ktf capacitor to provide a hurry-up kick to the control current Voltage Stability on this winding as an aid to fast FIG. 3—Transmitter waveguide discrimina- Long-term stability of the regu- regulation recovery. tor uses a single high-Q stabilized cavity lator depends upon the OD3 reference tubes. Stability is good since Regulation the tubes are in continuous service MA-AFC in Fig. 2. Internal opera- These regulator circuits are ef- at relatively constant current. tion of this magnetic amplifier is fective in maintaining stable fre- Stabilization of d-c output for a-c similar to the main regulator except quency transmission during a-c line variation of ±10 percent is that control is supplied from three line variations. With transmitter better than ±0.3 percent. A step sources to three control windings. afc disabled, slow a-c line voltage change of 10 percent on the a-c line" Two of the control windings are variations of ±10 percent result in causes a surge in the d-c output of used to create the slight over-con- typical frequency pulling of under 0.6 percent for a period of about trol regulation characteristic neces- 0.5 mc at 6,000 mc. Step changes

ELECTRONICS — February 73, 1959 69 PHASE KLYSTRON action, a different afc approach is REC DISC REFLECTOR used for the 1-o. The amplifier is chopper-stabili- ized and uses the circuit shown in Fig. 4. The input chopper is a balanced silicon-diode modulator lattice which is excited at 3.5 kc by

(4) a transistor oscillator. Only the MATCHED-DIODE presence of an error signal from CHOPPER-QUAD TI-600 the receiver discriminator will unbalance this net to pass the 3.5 kc on to the following amplifier. Sign of the error signal determines whether the unbalance signal will

REFLECTOR be of positive or negative phase. 3.5—KC SUPPLY A carefully matched diode quad is K.X Ipoo SUPPLY —400V required to avoid initial unbalance FIG. 4—Receiver automatic-frequency-control amplifier schematic in the absence of input signal over the expected temperature range. The 3.5-kc error signal out of of 10 percent may cause as much diodes. Because the reference the chopper is amplified in the two- as 1.5-mc momentary error. cavity is a high-Q device, a small stage transistor amplifier. No In addition to the voltage prob- change in klystron frequency will critical requirements for stability, lem, the klystron may drift as much result in a rapid change in the distortion or frequency response as three mc at temperature ex- phase of its reflection. The short are demanded of this portion of the tremes. These changes are detected circuit will not change reflection circuit. in a mcrowave discriminator which phase. On reentering the hybrid, Amplified error signal from the feeds a current proportional to the this new phase relationship causes amplifier is fed to an amplifying error back to the tertiary control the power to add at one diode and phase discriminator. This circuit winding. This arrangement com- cancel at the other. uses transistors on a half-wave pletes a negative feedback loop to Heart of the afc circuit is the basis. The two transistors are provide a voltage control action re- reference cavity. The barrel of the powered, collector to emitter, on ducing klystron frequency error cavity is machined from a block of alternate half cycles at 3.5 kc from with a correction stiffness of Invar to achieve a temperature the carrier oscillator. The error greater than 10 to 1. Metering pro- stability of about three parts in amplifier output gates both trans- vision is included so that klystron 10" per deg C. Initial Q of the cavity istors, base to emitter, on alternate frequency drift is indicated as an is about 20,000 but loading from half cycles. Depending upon error- off-zero reading of afc control the associated circuits yields an signal phase, one or the other of the current. operating Q of about 1,000. This transistors will conduct. This con- loading is necessary to yield a dis- duction flows through the common Transmitter AFC criminator of about six-mc peak-to- 30,000-ohm load with the direction The transmitter afc control cur- peak response so that the afc circuit of the current in the load revers- rent originates in a Pound-type will seize control quickly and with ing for a reversal of signal phase. microwave discriminator. Inner cir- certainty on a cold startup. In Since the phase discriminator needs cuit arrangements of the dis- normal operation, the afc will con- no d-c supply, the whole circuit is criminator are shown in Fig. 3. trol the frequency to within 0.6 divorced readily from ground po- The 30-db directional coupler bleeds mc under the combined effects of tential. This permits connection about one mw of transmitter power line voltage and temperature of the afc output voltage directly out of the main waveguide branch changes. This control is about five in series with the 400-v 1-o repeller into the discriminator circuit. times better than the FCC require- supply to add or subtract the neces- Power is split two ways in the ment of 0.05 percent and is con- sary correction voltage. short slot hybrid so that reflections sidered desirable from a spectrum In operation, the speed of attack are taken from both the reference usage economy viewpoint. of the receiver afc circuit has been cavity and the adjustable short cir- set to about 0.1 sec—substantially Receiver AFC cuit. These two reflections reenter faster than the one-sec time con- the hybrid from where the discrim- The receiver local-oscillator kly- stant of the minor transmitter fre- inator detecting diodes are fed. stron (1-o) is frequency-controlled quency variations caused by line- With the reference cavity ad- by a different technique. The avail- voltage bumps. This technique justed carefully to the required able afc control signal from the insures that the received signal transmitting channel frequency and receiver discriminator is only about • will be kept in tune to an accuracy the klystron on frequency exactly, five p,a/mc error and requires high exceeding ±0.3 mc at the receiver the adjustable short is set so that amplification. Since high-gain mag- i-f regardless of transmitter and equal power reaches each of the netic amplifiers tend to be slow in receiver 1-o klystron drift.

70 February 13, 1959 —ELECTRONICS CINCH HINGE

CONNECTORS INSURE POSITIVE CONTACT; HAVE SIMPLE LOCKING DEVICE, EASY RELEASE. MAXIMUM PLUG AND SOCKET NUMBER OF CONTACTS SHOWING CONTACT ARRANGEMENT IN MINIMUM SPACE Patent Pending The plug and socket units of the "H" Series The top section of the lock fits into a slot in the top of the cap forming a are easily engaged with normal pressure and perfect lock which cannot be accident- the lock holds them securely together. Re- ly opened, as shown below. Lifting up top section releases same prior to leasing the lock the units separate by the unlocking. spring action of the contacts. A simple locking device insures positive contact. Wiping contact action keeps contacts clean at all Socket with Lock Socket without Lock times. Either the plug or socket body fit into Dimensions Dimen-rn.; Code No Contacts Mtg Centers Overall Code No. Contacts !\.'.g Ce .3 Overall the cap. Cable entrance hole can be placed 24492 20 1.375 1.750 24484 20 1.375 1.750 at the one end, or in the top, or both. Cover 24493 30 1.812 2.187 24485 30 1.812 2.187 24494 40 2.250 2.625 24486 40 2.250 2.625 is finished in black wrinkle and the cable 24495 50 2.687 3.062 24487 50 2.687 3.026 clamps are cadmium plated. Contact tails 24496 60 3.125 3.500 24488 60 3.125 3.500 24497 70 3.562 3.937 24489 70 3.562 3.937 will take either conventional solder wiring or 24498 80 4.000 4.375 24413 80 4.000 4.375 AMP "78" series Taper Tab receptacles. 24499 90 4.438 4.812 24490 90 4.438 4.812 24500 100 4.875 5.250 24491 100 4.875 5.250 Standard units are supplied with general purpose Bakelite insulation and cadmium plated contacts.

Plugs without Lock-Mates with above Plug with Lock-Mates with above For more severe conditions of temperature and hu- Dimensions Dimensions Code No. Contacts Mtg Centers Overall Code No. Contacts Mtg Centers Overall midity we have available glass filled Diallyl-phthalate 24501 20 1.375 1.750 24476 20 1.375 1.750 insulation (Type GDI-30 per Mil. M-198 331. Contacts 2.187 24502 30 1.812 2.187 24477 30 1.812 can be supplied with gold plate over silver. 24503 40 2.250 2.625 24478 40 2.250 2.625 24504 50 2.687 3.062 24479 50 2.687 3.026 The plug or socket bodies can be ordered from the 24505 60 3.125 3.500 24480 60 3.125 3.500 24506 70 3.562 3.937 24481 70 3.562 3.937 code numbers listed. The one that is attached to the 24507 80 4.000 4.375 24412 80 4.000 4.375 chassis should have the lock attached. If an insulating 24508 90 4.438 4.812 24482 90 4.438 4.812 liner is required in the cover, suffix L should be added 24509 100 4.875 5.250 24483 100 4.875 5.250 to the Code Number.

The cap is ordered according to the number of contacts required. Then the letter L designating the liner. 50 CONTACT ASSEMBLY The letter giving hole size follows. Then the letter Caps for Plugs or Sockets without Locks indicating the location of the hole; either T for top, WITH CABLE CLAMP Code Mtg No. Contacts Hole Size Ctrs Overall or E for end, and if a cable clamp is required, the 24537 20 A or B 1.375 1.750 letter C is added. 24538 30 A B or C 1.812 2.187 24539 40 B or C 2.250 2.625 For example, if a 50 contact unit is required with 24540 50 or C 2.687 3.062 cover, having a 34" hole in the top with a cable clamp 24541 60 C or D 3.125 3.500 and liner, the code would be 24540-LBTC. The chassis 24542 70 C or D 3.562 3.937 24543 80 C or D 4.000 4.375 socket would be 24495 and the plug for the cap 24504. 24544 90 D or E 4.437 4.812 The Cinch "H" series is made in 20 to 100 contacts, 24545 100 D or E 4.875 5.250 in multiples of 10 contacts. (20, 30, 40, etc.)

Cap Hole Size Cable Clamp Size Centrally located plants at Chicago, Letter D.muns.cn Illinois; Shelbyville, Indiana; La Pu- A dia. Small ente, California; St. Louis, Missouri

/14 " Small 13/16 x I Medium D 13/16 x Medium E 13/16 x 1-11/16 - Large

Electrical Rating

Volts Components shown ACRMS DC reduced in size Adjacent Terminals 930 1300 to Ground 1400 2000 Current Rating 4.5 Amperes Contact Resistance rated current @ .020 ohms CINCH MANUFACTURING COMPANY Insulation Resistance 1000 megohrns 1026 South Homan Ave., Chicago 24, Illinois Capacitance adjacent contacts .75 MMF Division of United-Carr Fastener Corporation, Boston, Mass.

CIRCLE 46 READERS SERVICE CARD ELECTRONICS REFERENCE SHEET

— fitRo REF LINE THERMISTOR RESISTANCE IN OHMS — 2 AT GIVEN — 3 TEMP — 4 — 5 200 EXAMPLE: FIND R AT 180 C — 10 100 FOR GLASS- COATED BEAD — 20 THERMISTOR (a 3,495; MAT 1) 50 30 WHEN Ro AT 25 C IS EQUAL TO 2,000 OHMS ,`5'8 R0 r =- 100 —10 10 A GLASS-COATED BEADS THERMISTOR 4,115; MAT I RESISTANCE — 200 — 50 — 300 5 IN OHMS L 100 — 400 DISCS, WASHERS. RODS AT 25C 3,900; MAT 1 — 500 — 500 ' — lIC L IK 1.0 ANSWER: — 2K R= 30 OHMS 0.5 GLASS-COATED BEADS — 5K — 3K ar 3,495; — 10K — 4K MATERIAL 2 — 5K 50K — 10K E- 100K 0.1 — 20K 0.05 500K — 30K IMEG — 40K — 50K 5MEG — 100K e- 10 MEG .01 — 200K .005 — 300 — 400 — 500 FORMULA: - 1MEG .001 300 250 200 150 100 50 R .11 0€ T 2" — 3MEG T- TEMP IN DEC C er NAPERIAN BASE 2.718 — 4MEG 5MEG 1 1 1111111111 I I /3 THU:041570R MATERIAL CONSTANT 550 500 400 300 200 100 0 -MO MEG T- TEMP IN DEC F

Thermistor Data Chart

Chart quickly spots thermistor resistance values at desired application temperatures for standard thermistor types

By A. E. LAWSON, JR, Chief Engineer, Fenwal Electronics Inc., Framingham, Mass.

S ELECTING THERM ISTORS for graph for the various forms of horizontally to the reference temperature compensation, the two thermistor materials. line. A line drawn from this measurement and control re- All thermistors of either ma- point on the reference line to quires analysis of resistance at terial have pvalues close to the 2,000 ohms on the R. scale, inter- known application temperatures. indicated nominal. It is possible sects the R scale at 30 ohms. The accompanying nomograph to interpolate on the graph for Conversely, to find R at 25 C is a timesaver for solving the actual values of /3 that vary sig- when a thermistor resistance of thermistor resistance formula nificantly. However the ratio 30 ohms is needed, the line g'ven on the chart. Resistance R/R„ is a more useful charac- crosses the R. scale at 2,000. R0 and thermistor constant /5' are teristic in selecting thermistors. Limitations of thermistor commonly given for each ther- types are described in manufac- mistor type and so are curnes of Example turers catalogs. After a par- resistance ratio R/R„. In the example given on the ticular value is found with the t-ln-esentative nominal mag- chart, a vertical line is drawn to chart, the user should check the nitud,,s of are given on the curve R and from this point catalog to see if it is feasible.

72 Fe el 13, 1959 — ELECTRONICS Announcing Epsco's NEW

11311011 JOR ADVANCE IN DIGITAL VOLT-OHM METERS

V3 ACTUAL SIZE

• VE RSATI LE accurately measures both resistances and AC-DC voltages and counts external events, too! Directly drives printers, punches and memory storage units and can be directly used as a bi-directional telemeter.

• FAST less than 2 millisecond reading time ... up to 100 completely independent measurements per second for any system use. FULLY TRANSISTORIZED No Stepping Switches • No Relays • EASY TO READ in-line, in-plane visual display ... lamp life up to 10,000 hours ... numerals 1V8 inch high ... automatic indication of polarity, decimal point and mode of operation

True dependability and versatility have at long last come to digital volt-ohm meters in EPSCO'S new DVOM. Fully transistorized ...ad¡ustment-free ...no stepping switches or relays. Provides precise numerical measurement of AC-DC

' voltages, resistances .. . fast, accurate visual or printed quality control data .. . high-speed data acquisition for direct print-out or storage ... remote indication and data epsece„ transmission over asingle line. Compact, lightweight, portable — also for rack-mounting. Write for Bulletin 95801, Epsco, Inc., Equipment Division, 588 Commonwealth Ave., First in data control Boston 15, Mass.; in the West: Epsco-West, 125 E. Orangethorpe Ave., Anaheim, California

DVOM price $1,475 Ask for a demonstration.

ELECTRONICS—February 13, 1959 CIRCLE 47 READERS SERVICE CARD 73 RESEARCH AND DEVELOPMENT

Artificial Neuron Uses Transistors

EXCITER INPUTS -12V X. X 1,000 ately after firing, the electronic neuron's threshold rises to infinity and for a few milliseconds no input signal can fire the neuron again. The cell has an integrating time constant of two milliseconds and a refractory time constant of about ten milliseconds, approximating time constants of the biological neuron. Because the electronic inputs and outputs are compatible, INHIBITORY +I2V INPUT the cells can be assembled into chains and networks. Elements of electronic nerve cell are FIG. 1—Simple transistor circuit simulates mounted on printed-circuit card for ease many of the functions of nerve cells of Electronic neurons can be com- of handling. Network of such cells can the eye and ear. Groups of the cells can bined with photo-resistive cells to be seen in background be combined to form simple nerve systems simulate simple functions of nerves in the retina. Some receptors (on ELECTRONIC circuit, developed at stimulus, simulating receptor cells receptors) fire only when light in- Bell Telephone Labs, simulates of the eye or ear, trains of pulses tensity is increasing, off receptors some functions of individual bi- are emitted. Higher intensity ex- fire only when light is decreasing ological nerve cells (neurons). citation increases frequency; and and during receptors fire while Numbers of the artificial cells are when the neuron is excited con- light is steady. being combined into experimental tinuously, frequency can be made Flicker-fusion phenomena have networks that are roughly ana- to decrease with time, exhibiting also been produced. In the human logous to the nerve systems of the accomodation as a living nerve cell eye, these cause a sequence of eye and ear. does. flashes to be seen as continuous il- Scientists are especially inter- lumination. Input Threshold ested in discovering how visual and Mutual inhibition of cells in an auditory nerves function and how Input must, as in a biological cell, array has been demonstrated ex- their signals are interpreted by the surpass a threshold value, and the perimentally. Some animals have brain. cell will integrate two or more in- been observed to possess this ar- The circuit shown in Fig. 1 de- put pulses below threshold value to rangement, in which a cell receiv- livers 6-millisecond pulses, con- cause firing. A particular input con- ing greater light inhibits firing of siderably longer than the biological nection can also, while energized, nearby cells that receive less light. cell, but they can be shortened. If inhibit firing of the neuron by Result is local sharpening of image the circuit is driven by a constant other inputs. Similarly, immedi- boundry detail.

Polarimeter Provides CRT Presentation

POLARIZATION characteristics of an transmission-line modes in avariety electromagnetic wave can be seen of ways. The junction can be directly on a crt. Key to the tech- matched for any two, but not for nique is the trimode turnstile wave all three modes simultaneously. guide junction. The coupling properties of the The new microwave polarimeter trimode turnstile junction make it technique uses both phase and am- ideally suited to a precision dual plitude information to provide an balanced mixer. The rectangular accurate, instantaneous presenta- waveguide at the bottom is an tion of input signal polarization end-on waveguide-to-coax transi- characteristics. tion to port 7 and serves as the local oscillator input. Trimode Turnstile Junction When an electromagnetic wave of The trimode turnstile junction arbitrary polarization is introduced 7 shown in Fig. 1 is a 7-port hybrid into the circular waveguide arm in FIG. 1—Trimode turnstile waveguide junc. tion has 7-port hybrid junction and device that couples three different which the coaxial and circular ports couples 3 transmission-line modes

74 February 13, 1959 — ELECTRONICS First family of power triodes made specifically for series regulation!

Tung-Sol/Chatham power triode family covers every series regulator need!

Now designers can specify apremium quality Tung-Sol/ heater versions available on most types. All embody Chatham tube for all series regulator sockets. Tung- sturdy construction features that contribute to overall Sol/Chatham's family of power triodes — the first ruggedness and long hours of heavy-duty operation. designed and produced specially for series regulator Compare the ratings below against your particular service — meets all 'design requirements and assures application! If you desire complete data sheets .. . maximum reliability and life at all times. or you have a specific design problem, contact us Types include the new 100 Watters, 7241 and 7242, today! We'll be glad to give whatever assistance we medium mu or low mu-high current. 12 or 26 Volt can. Just write: Tung-Sol Electric Inc., Newark 4, N. J., Commercial Engineering Offices: Bloomfield and Liv-

TYPICAL VALUES ingston. N. J., Culver City, Calif., Melrose Park, Ill.

Total Plate Range of Tube Minimum Grid Voltage Current Voltage Drop Tube Drop Swing 200 ma 80 v 45 v 20 v 400 a 65 70 10 600 80 70 13 TUNG-SOL

PERTINENT CHARACTERISTICS PER TUBE TUBE TYPES BY PLATE DISSIPATION RATINGS

Max. Plate Max. Plate Total Plate MU Gm 26 to 30 W 60 W Current Voltage Dissipation

280 275 5.5 28,000 umhoS 6AS7G, 6082 6336A 7241 600 400 9.0 74,000 umhos 6080WA, 7105 6394A 722 900 400 9.0 111,000 umhos 'TM 5998 6528 7242 ELECTRONICS —February 13, 1959 CIRCLE 48 READERS SERVICE CARD 75 FIRST Navy Militarized SSB Transmitter

TR IMO DE TU RNS TILE Generates Cleaner Signal Using DU AL BALANC ED MIX ER

MIXER HYCON EASTERN CRYSTAL FILTERS CRY STAL S

IRE SHOW CIRCULAR BOOTH NOS. WAVE GUID E 3038 á 3039 SIG IN

FIG. 2—Simple arrangement permits crt display of polarization characteristics

are matched, arrows 5 and 6 represent orthogonal components of the input signal, which are not neces- sarily equal nor in phase. On en- tering the junction, component 5 divides equally but out of phase between arms 1and 3. Similarly, com-

HYCON EASTERN INC ponent 6 divides equally but out of INAICN ES wsumern phase between arms 2 and 4. CRYSTAL FILTER TYPE Local oscillator input to port 7 anirms divides equally and in phase between the four rectangular arms 1, 2, 3 and 4. Mixer crystals attached Hycon Eastern Crystal Filter Model 2MUB. to all four rectangular arms, Carrier frequency 2 Mc. Shown approx. 1/2 size. equidistant from the junction, will be excited in phase by the local

Single-Sidebond Transmitter, Model AN, WRT-2 oscillator input, while opposing developed by Westinghouse Electric Corpora- crystals can be combined to obtain tion for the U.S. Navy uses Hycon Eastern balanced mixer operation by using Crystal Filters, Model 2MUB and 2MLB. reversed matched crystals connected in d-c series with a simple shunt Recently installed on the atomic submarine SKIPJACK connection for single-ended i-f out- (SSN585), the Westinghouse Electric AN/WRT-2 SSB Trans- put. mitter is soon to be standard Navy equipment. Trimode Turnstile Polarimeter Single sideband signals are generated in the AN/WRT-2 by the selective filter method employing Hycon Eastern 2MUB With linear mixing, phase and and 2MLB Crystal Filters. These 2.0 Mc Crystal Filters not amplitude relationships of the only offer all the basic advantages of the filter SSB generation method, but reduce the number of heterodyning stages required to translate the modulated signal to the required output fre- Atlas Gets Final Check quency. The attendant decrease in unwanted signal generation results in a cleaner signal. The AN/WRT-2 is also a more reliable transmitter because fewer components are used. In addition to the 2.0 Mc Crystal Filters, Hycon Eastern has also supplied SSB units at 100 Kc, 1.75 Mc, 3.2 Mc, 10 Mc and 16 Mc. These Crystal Filters are presently installed in airborne HF, mobile VHF and point to point UHF SSB systems. Whether your selectivity problems are in transmission or reception, AM or FM, mobile or fixed equipment, you can call on Hycon Eastern engineering specialists to assist you in the design of your circuitry and in the selection of filter characteristics best suited to your needs. Write for Crystal Filter Bulletin to Hycon Eastern, Inc., 75 Cambridge Parkway, Cambridge, Mass. A limited number of opportunities are available to experienced circuit designers. Send resume to Dr. D. I. Kosowsky.

Acceptance tests of an Atlas missile are HYCON EASTERN, INC. underway as it lies in its carrier. Costly electronics associated with missile include 75 Cambridge Parkway Dept. A Cambridge 42, Mass. Burrough's ground guidance computer which steers missile through initial stages of flight

76 CIRCLE 49 READERS SERVICE CARD February 13, 1959—ELECTRONICS eme orthogonal components of the in- o. put signal will be accurately preserved in the i-f outputs of the two IN ANALOG DATA REDUCTION SYSTEMS a balanced mixers. a The i-f signals are used to make Three companion units by Hycon Eastern provide auto- a polarization characteristics of the o matic indexing and high-speed access to selected data input signal visible using the ar- in multi-channel magnetic tape instrumentation systems. rangement shown in Fig. 2. Typi- cally, the two i-f signals are applied to orthogonal deflection planes of a crt, after amplification, to ob- 604 Tape 901cie.zülf tain a Lissajous figure that repre- DIGITAL TIMING GENERATOR, MODEL 201, gener- sents input signal polarization. ates numerically coded timing signals which are A circularly polarized input will recorded on magnetic tape throughout the data generate a circle, elliptical polari- recording periods, providing a precise digital zation an ellipse that portrays axial index in terms of elapsed time. The Generator also visually displays the exact time in hours, ratio and orientation and linear minutes and seconds as illuminated digits. polarization a line oriented to indicate plane of polarization. DIGITAL TIMING GENERATOR, MODEL 206A, FOR Excellent presentations have been AIRBORNE APPLICATIONS is a militarized ver- obtained using separate reflex kly- sion of Model 201. A Remote Control Box strons for signal source and local contains Power off-Standby-Operate Switch, oscillator. They are tuned to pro- the Digital Clock Set, and the Time Display. duce an i-f beat that is within the Completely transistorized, Model 206A includes a binary coded decimal system al- passband of the scope amplifiers. though other timing formats are available to meet customer requirements. Satisfactory results were obtained Weighing only 15 pounds, Model 206A is stable to 1part in 100,000 giving an without afc. accuracy of ± 1second in 1day's time. This material was abstracted IRE SHOW from NRL Report 5214, An In- BOOTH NOS. staneous Microwave Polarimeter 6e4 Tape Secdsch 3038 & 3039 Technique by P. J. Allen and R. D. MAGNETIC TAPE SEARCH UNIT, MODEL 202, operates dur- Tompkins of the U. S. Naval Re- ing data reduction periods. On the basis of time indices search Laboratory. recorded on the tape by the Digital Timing Generator, this instrument automatically locates and selects for controlled playback the tape data included between a "sequence start time" and a "sequence end time" spe- Unit Reduces Required cified by panel dial settings. The time index is visually Tv Scan Power displayed as illuminated digits on a small separate panel which may be remotely located for convenience. SCAN MAGNIFICATION system re- Model 202 may be modified to search for timing for- cently developed brings practical mats other than those originated by Model 201. transistorized tv receivers closer to reality. The system, just announced by Mullard Research Labs, London, MIIIMMIIIMEIBM reduces power required from crt scanning circuits. MaillIMPW11.11111PEM MMBIFÀBV_ dal. The magnetic lens used to ob- •lUr d3.211111a la» tain the scan amplification is a BMWs IrIUMMIMIBM quadrupole, positioned about the AIMIZZMIIIIIMMEM MMMIIIMMUMBRIIIM axis of the tube. The quadrupole acts as a diverging element in the WIND TUNNEL TESTING JET ENGINE TESTING MISSILE AND AIRCRAFT TESTING horizontal plane and as a converg- Pressure and temperature data Digital Timing Generator, Model 206A generates timing ing element in the perpendicular. of missiles are referenced to Model 201 synchronizes all signals simultaneously with angle of attack. Model 201 data receiving equipment. Its other flight test data. Model It is the diverging element that is records on tape a digitized output can be piped to mul- 201 generates o timing code responsible for the magnification. position signal for each new tiple test cells and control format for synchronizing Two more quadrupoles provide a angle of attack. rooms simultaneously. ground station recordings. form of alternating gradient fo- Write for Technical Bulletin TSG cusing. Using scan magnification, the power required from the horizontal HYCON EASTERN, INC. scanning circuits may be reduced by 75 Cambridge Parkway Dept. A Cambridge 42, Moss. as much as 100 to 1, according to Mullard.

ELECTRONICS—February 13, 1959 CIRCLE 50 READERS SERVICE CARD 77 COMPONENTS AND MATERIALS

Three Approaches to Stereo Pickups

ONE MAGNETIC and two ceramic RIGID CLAMP CENTER CONTACT stereo cartridges, described at the recent Audio Engineering Society CERAMIC PZT TUBE Annual Meeting, illustrate compo- ELEMENT nent design versatility. DRIVE POINT Magnetic Cartridge RUBBER ELECTRODE BLOCK QUADRANTS The magnetic cartridge' shown STYLUS WIRE PIVOT in Fig. 1, consists of the stylus te•---JUMPERS FIG. 2—Bell crank drive of ceramic canti- assembly and magnet common to FIG. 3—Ceramic cylinder used in single- lever for stereo pickup (Columbia) both channels with a pole piece and element cartridge (Electro -Voice) coil for each channel. Lower parts of the pole pieces incline towards each other. With the armature, a common stylus and wire pivot. they form the air gap. The two drive points form a right When the armature is in a quies- angle about the wire pivot in the cent position resting in an unmodu- plane of the elements. The lever lated groove, flux from the magnet couples the transducer rigidly to the record at the drive point and is distributed equally between both (A) pole pieces. Flux flows from the the undriven end is clamped. Since magnet, along the armature up FIG. 4—Four quadrants and polarization there is no lost motion between the of ceramic element (A) and bending stylus and ceramic cantilever, the each pole piece and then back to forces (B) the magnet. When the armature is voltage generated is proportional moved by one groove wall being to displacement of the stylus. modulated at 45 deg, the armature in a 45-deg plane. It is a hill and Single-Element Ceramic approaches and recedes from one dale reproducer. Vertical motion A second ceramic cartridge' uses pole piece alternately, and remains of the stylus is stepped down and a single ceramic element in the at about a constant distance from rotated to horizontal motion of the form of acylinder, as shown in Fig. the other. A flux change is induced drive point. This action gives a 3. The tube is made of lead zir- in the first pole piece giving an out- bending moment to the ceramic ele- conia titanate and is electroded on put in its associated coil. Constant ment. A soft rubber block under the inner and outer surfaces with flux is maintained in the second the element balances the biasing conductive silver. The outer elec- pole piece. When the opposite force on the drive point caused by trode surface is divided into four groove wall is modulated, output static force of the needle an the quadrants and the element is polar- occurs in the second coil in a simi- record. ized as shown in Fig. 4A. lar manner. The arrangement gives A horizontal wire is used as the To operate the element as a good and consistent separation be- fulcrum of the bell crank lever. Use bender, it must be connected in tween channels. of the wire eliminates any lost mo- parallel with opposite diagonal One of the generators in a ce- tion which would occur with less quadrants bridged. The center elec- ramic pickup' is shown in Fig. 2 than perfect pivots. And the wire trode is grounded for maximum in- combines both high longitudinal terelectrode shielding. When prop-

CHANNEL 2 stiffness with high compliance to erly polarized, a force A applied to OUT MAGNETIC laterial and vertical movement in produce a bend about axis 1, 2 in FLUX CHANNEL I OUT the plane perpendicular to the one Fig. 4B will stress one quadrant in which the stylus lies. The bell in tension and the opposite in corn- crank imparts motion to the trans- ALNICO 5 PICKUP COILS MAGN ET ducer from vertical stimulation of the stylus. Motion in the perpen- DAMPING PAD CASE ONTACT BLADE dicular plane (horizontal in Fig. 2) is ignored since the bell crank CERAMIC TUBE pivots about a vertical axis which NEEDLE includes the drive point and the BOOT GROUND CONTACT FLOATING wire virtual pivot. Motion in the ON END `..A•''% ARMATURE quadrature plane does not impart POLE 45*-45° DIAMOND STYLUS PIECE a twisting moment to the element. STYLI COUPLING TUBE CONTACT BLADE In the actual cartridge, there are FIG. 1—Magnetic stereo cartridge (Gen- FIG. 5—Mechanical drawing of complete eral Electric) two bell cranks 90-deg apart with single-element cartridge

78 February 13, 1959 — ELECTRONICS TRANSISTOR EXPERTS... are betting that this is the winning conibination :

P eà'

elv4e. .L A8,,L,ITy (k. -0 ,1000, Pdp, o'‘‘‘' . Q

FAIRCHILD SILICON

TRANSISTORS come through, fulfilling the extraordinary promises you've heard rumored about the new solid -state diffusion devices. A* SPEED — 80 milli-micro-second rise time affords the fastest switching yet available with silicon. A V POWER — 2 watts dissipation at 25° C. leaves plenty of power handling capability at higher temperatures too. A+ RELIABILITY— Storage at 300' C. for 350 hours caused no serious changes, assuring a large safety factor at operating temperatures. Mesa construction provides extraordinary ruggedness too. A • AVAILABILITY—Thousands of the 2N696 and 2N697 transistors have been delivered in the first months after announcement. Stock is available for immediate shipment. 2* LOWER PRICES — Fairchild is gearing for quantity sales and bringing prices down within reach of more users. A second large plant expansion is being made in response to demand. Look to the future Existence of Fairchild's multiple-diffused transistors is already having a profound effect on the breadboard designs of today. It means competitive improvements in the quantity production of tomorrow— both in the race for military superiority and in various commercial bids for sales leadership. May we send you specifications?

/IA MC-11110 SEMICONDUCTOR CORPORATION

844 CHARLESTON RD. • PALO ALTO, CALIF. • DA 6-6695

ELECTRONICS — February 13, 1959 CIRCLE 51 READERS SERVICE CARD 79 _ r AD #97A pression. A force B applied to produce a bend about axis 3, 4 will stress the other quadrants of the element to generate a potential with respect to ground. In both cases, the electrodes adjacent to the neutral plane will be stressed in the same direction and the generated potential will be cancelled. Figure 5 shows a phantom view of the complete cartridge.

THROUGH THE EYE References OF HALLAMORE 1. P. E. Pritchard, A Variable Reluctance Stereophonic Pick-Up Cartridge, paper presented at 10th Annual Meeting Audio CLOSED CIRCUIT TELEVISION Engineering Society. 2. W. S. Bachman, A Constant Displace- ment Stereophonic Cartridge, paper pre- ...each testing complex at the massiv sented at 10th Annual Meeting Audio Engineering Society. MARTIN-DENVER "Titan" facility! 3. .1. F. Wood. A Single Element Stereo- phonic Cartridge, paper presented at 10th Annual Meeting Audio Engineering So- as visually monitored, from as close as 10" from direct missile ciety.

blast as well as from perimeter checkpoints. Environmentally,

i-otected, transistorized Hallamore cameras (Model CC420),; Isotope Powers Thermo Converter remotely controlled from more than 2000 feet, provide a con-1 tinuously clear picture through every phase of firing. Over 32 Hallamore designed, manufactured, and installed CCTV systems' support the Hallamore designed and installed electronic system

(over 900 racks) that provides telemetry for the entire Martin-, Denver testing complex. Hallamore capability and creativityl can be the answer to your systems requirement. Write Hallamorei Electronics Company, 8352 Brookhurst, Anaheim, Californial TWX: AH 9079...a division of The Siegler Corporation \ Maj. Gen. D. J. Keirn, USAF, director of SNAP III shown with demonstration setup

DEVELOPED as a proof-of-principle device by the Joint AEC—Air Force Aircraft Nuclear Propulsion Office, the SNAP III thermoelectric conversion device weighs five lb, is 53 in. high and 4.1,in. in diam. Energy is derived from radioactive polonium-210. Radiation of the polonium is converted directly into electricity by means of lead-telluride thermocouples. Using a fresh 3,000-curie supply of polonium-210, the generator will deliver five watts of electrical power at an efficiency of eight to 10 percent. After the first 140-day half- life of the polonium, output power is three watts at an efficiency of between five and six percent.

ENGINEERS... FOR IDEAL WORKING CONDITIONS WITH A DYNAMIC, CREATIVE ORGANIZATION. ADDRESS RESUME TO CHIEF ENGINEER Contrary to some newspaper reports of the development, total cost of the device was $30,000. Half of HALLAMORE this sum was the cost of the polo- 80 CIRCLE 52 READERS SERVICE CARD February 13, 1959—ELECTRONICS • 111,tes.• To provide an output Potentiometer-Transducer nium. Prime contractor for SNAP vito which can be readily engaged with a minimum III was the Martin Company. Min- angular error to a servomechanisms gear train when energized by an external command signal. The transducer must nesota Mining and Manufacturing accurately return to a specified null position when the command signal is removed. Co. was subcontractor for the inter- metallic thermocouples.

Operating Principle Basic operation of the device is based on long-known principles. Energy liberated by the spontane- ous decay of the radioisotope raises the temperature of the metallic core and container surrounding it. This temperature increase starts the movement of electrons. Twenty pairs of semiconductor thermoelectric conversion elements extend like spokes from the center to cold junc- A SOLUTION: tions along the inside of the outer Provide an electro-magnetic wall. These lead-telluride rods are clutch, spring return doped alternately to produce an mechanism and rotary excess or deficiency of electrons and potentiometer. Assemble are connected in series between the these parts into the required package with the resultant COMMAND hot and cold junctions. "ANAL difficulties brought about by Usable electrical energy is the mounting and coupling created by the Seebeck electromo- problems with aconsequent tive force generated between the increase in cost. hot and cold junctions. THE OPTIMUM SOLUTION: ut

New Material Takes Technology Instrument Corpo- unitized Temperatures of 5000F ration's west coast engineering package facilities developed and offer DESIGNATED AVCOITE by Avco Re- a unitized package consist- search and Advanced Development, ing of an electro-magnetic GENERAL a new material of specially designed clutch, spring return INFORMATION: reinforced ceramic will withstand mechanism and rotary Shaft Position Transducers temperatures in excess of 5000 F. can be linear or nonlinear potentiometer as one The new ceramic has been devel- potentiometers, synchros. compact assembly. The linear transformers or oped to be quasi ductile. digitizers. Spring return clutch will transmit mechanism can be supplied high torque without designed to return to any desired point. Abuilt-in slip slippage and has negli- clutch can also be furnished gible angular engagement if the input torque can Special Alloy Gives exceed the rating of the Continuous Getter error. TIC's unique spring return mech- clutch. anism will accurately return the output THORIUM, aluminum and rare earth transducer to the desired null, yet requires low driving torque. metals are combined in an alloy TIC's unitized assembly replaces three (3) individual components called CerAlloy 400. The alloy is with their inherent assembly difficulties. used as a gettering agent for electron tubes acting to sorb gases continuously throughout the active TIC UNITIZED PACKAGE HAS MANY APPLICATIONS, life of the tubes. SUCH AS: Auto pilots, altitude controllers, machine controllers, measurement and control problems, speed control, process Available from New Process control of temperature and flow, differential measurement, Metals, Inc., the getter is reported expanded scale servos, or any other problem requiring an to cut cathode interface resistance output, commencing at some specified servo position determined in half. The getter combines with by an external command signal. active gases to the limit of its bulk capacity. Its optimum gas sorption TECHNOLOGY INSTRUMENT CORPORATION occurs in the temperature range Subsidiaries: Technology Instrument Corp. of Calif. from 400 to 500 C. But it will get- North Hollywood, Calif. 569 Main Street Acton Laboratories, Inc., Acton, Mass. ter from its sorptive threshold to Tucson Instrument Corp.. Tucson. Ariz. Acton, Massachusetts Servotrol, Inc., Chicago, Ill. 700 C. Altomac Corp., Canton, Mass.

ELECTRONICS—February 13, 7959 CIRCLE 53 REARS SERVICE CARD 81 PRODUCTION TECHNIQUES

Progressive Die Forms Getters

Operator checks getter assemblies as they drop from die. Machine automatically produces Die in open position; pellet feed chute is 4,000 assemblies an hour from nickel strip and hopper-loaded barium-aluminum pellets at lower left

FLAG-MOUNTED GETTERS, formed in intimate contact with the cup so a progressive die, are being used in that the getter alloy is held in the subminiature tubes made by Ray- cup by surface tension. The finished theon Manufacturing Co., Waltham, flags drop into a receiving box and Mass. Barium-aluminum getter al- are given a 1,000-hour hot-box test loy is forced under pressure into a before delivery to the tube assem- tiny cup in the nickel flag, which is bly line. in turn mounted at an angle above The fingers are thin metal plates tube elements. on each side of a firm metal rod. Quantity production of the getter The plates are slightly notched to flags is accomplished in a progres- exert a pushing motion and trans- sive die in a 20-ton press. The cup fer the flag blanks to the assembly is first formed oversized in nickel station. They move back and forth strip and is then reduced in 3stages about 11 inch each time the press to a diameter of 0.105 inch. Follow- is actuated. ing stations form the legs as shown Advantages of the new tech- in Fig. 1. nique, according to Raytheon, in- The strip then advances to the clude: it practically eliminates flak- sixth station where the flag is ing off of small particles of getter Closeup of bottom half of die. Fingers punched out and driven through the are directly under square plate in left in the tube; the flag acts as a die onto a set of movable fingers. center shield, eliminating the usual mica The fingers push the flags forward shield; it is economical with ex- to an assembly station. The flag legs are bent back at a 30-degree angle. CUP REDUCED IN SIZE A vibratory hopper feeds the 0 0 fragile pellets of getter material 0 down a gravity chute. A cutoff feed separates the pellets and delivers them, 1at a time, for assembly into REGISTERING HOLES GETTER SEATED the flags. The pellets are 0.100 inch in diameter and 0.012 to 0.014 inch in thickness. J At the assembly station, a die reshapes the pellets into smooth el- Fig. 1—Steps in formation of flag- Getter pellet, flag and getter in position mounted getters liptical form and seats them in on slàbminiature tube assembly

82 February 73, 7959 — ELECTRONICS New Plasmarc Torch Service for Production 15,000 degrees, literally melting the particles to a Parts from Refractory Metals —By harness- fluid or plastic state. Inert gases, flowing continuing the highest controlled temperatures ever used in ously, deposit them at near-sonic speeds on the work- industry—up to 30,000 degrees F.,—the new Plas- piece. Jets of CO2 cool the particles instantly to form marc Torch makes possible the fast and accurate heat-and-erosion-resistant material. Coatings, even mass production of ultra-hard materials that have on graphite, have an excellent bond. Shapes are been virtually unworkable by any previous means. built up on machined mandrels which are then etched With the patented Plasmarc Torch, LINDE IS away to leave the finished parts. equipped to supply parts made of, or coated with There are no known limitations on size or complex- refractory metals, or made of avari- ity of shape. Accuracy of -± .002 in. can be maintained. ety of metals combined with non- The Plasmarc Torch has been used to make high- metals or reinforced plastics. This density tungsten crucibles, special parts for nuclear method has been used successfully work, sensitive electrical contacts, and electronic with pure tungsten, molybdenum, components and x-ray targets. LINDE will also pro- zirconium, and tantalum (all metals vide a wind-tunnel materials testing service based in the highest temperature range), on this device. hard carbide materials, and even For information on this extension of LINDE'S well- precious metals, including platinum known Flame-Plating service, write Dept. BD-22, and palladium. LINDE COMPANY, Division of Union Carbide Cor- In powder or wire form, the metal being worked poration, 30 East 42nd Street, New York 17, N. Y. is fed into the torch chamber where a non-trans- In Canada: LINDE COMPANY, Division of Union Car- ferred electric arc generates temperatures above bide Canada Limited. FOR MEN WITH IMAGINATION

Three-Level Ruby Maser—The Maser is a LINDE also supplies other crystals including rutile, microwave amplifier utilizing energy stored in amo- spinel and sapphire (A1203)• Sapphire is used in infra- lecular or atomic system. Emission of this energy is red optical systems, windows for high power micro- stimulated by the input signal. Masers operate at wave tubes, spacers and supports in vacuum tubes, liquid helium temperatures and have incredibly low radiation pipes. It has strength at elevated tem- noise levels approaching zero db. Recently a Uni- peratures, melts at 2040°C, is hard, inert, non-porous versity research laboratory* used LINDE single crys- and can be sealed to metals and glasses. Sapphire is tal synthetic ruby (A1203 with Cr2O3 additive) in a currently available in the shape of domes, windows three-level solid state Maser. The ruby up to 4Y2 inches in diameter, rods and special con- crystal was placed at the center of the figurations. Maser's tuned cavity and amagnetic For further data write to Crystal Products De- field of 4200 gauss was applied. To partment BD-22, LINDE COMPANY, Division of Union bring electrons from a ground state Carbide Corporation, 30 East 42nd Street, New into apermissible higher energy level, York 17, New York. a pumping frequency of 24 kMc was *"Maser Action in Ruby," by G. Makhov, C. Kikuchi, used and the Maser successfully am- J. Lambe, and R.W.Terhune."Physical Review," Volume 109, plified signals at 9.3 kMc. Number 4, Page 1399, Feb. 15, 1958.

PRODUCTS WITH A FUTURE

The terms"Linde,"Union Carbide" and "Plasmarc" are trade-marks of Union Carbide Corporation. ' AD' "ARK

ELECTRONICS — February 13, 1959 CIRCLE 54 READERS SERVICE CARD 83 0 PleLOilibir ... for Complete Reliability Under Severe Environmental Conditions

Side view of fingers

pensive getter material and improves gas cleanup. Application to other tube types is under development, but the company does not plan to manufacture the getters for outside sale.

WW-R8•16 Air Pulses Measure

WW-R8-1 5 Abrasive Case Filler

WWR TYPE, PRECISELY MEASURED amounts of 5Sizes WW-R8-09 fluid must be dispensed in transistor case-filling operations. Measur- ing accuracy is difficult to maintain with mechanical metering pumps when the thermally conductive pot- TYPE WW ENCAPSULATED RESISTORS ting suspension contains a filler Wire Wound, Precision, Hi-Value, Non-Inductive which happens to the abrasive in nature. A case-filling machine at RCA TYPICAL DERATING CURVE Semiconductor and Materials Divi- High resistance value, wire wound sion, Somerville, N. J. avoids ero- ice 3 resistors designed for non-inductive 2 73 requirements that demand the clos- sion of mechanical parts by using 30 est precision tolerance. Encapsulated compressed air pulses to move the in carefully compounded material, e 23 abrasive-filled dielectric. The only selected for matching coefficient of ▪ °25 75 1 5 17$ 273 2 3 expansion to that of the wire. moving part in contact with the AMSI NT EMI DEG CENTIGRADE fluid is a stirrer. JUST ASK US • Rated at .1 watt to 2 watts, with a wide selection, depending on type and size. The DALOHM line includes precision resistors Iwire wound and deposited car- • Resistance range from 0.6 ohm to 6 PHOTO-CELL STIRRER bon); trimmer potentiometers; resistor Megohms, depending on type. L DIA networks; collet fitting knobs and hys- 8 • •Tolerance: :.4._- 0.05%, -± 0.1%, -±. 0.25%, VALVE teresis motors designed specifically for NOZZLE AIR 0.5%, ± 1%, ± 3%. advanced electronic circuitry. 20-30 If none of the DALOHM standard line P.S.I meets your needs, our engineering depart- TEMPERATURE COEFFICIENT: Within ment is ready to help solve your problem 0.00002/degree C. SWITCH in the realm of development, engineering, SHELL design and production. OPERATING TEMPERATURE RANGE: Just outline your specific situation. —55 C. to 125 C. TIMER FLUID SMALLEST IN SIZE: /14 "x 3/."to 2/14 "x Ye".

COMPLETE PROTECTION: Encapsulating Fig. 1—Principal parts of abrasive fluid material makes them completely impervious to penetrating effects of salt spray, humidity, dispenser DALE moisture and corrosive gases and vapors. CONFIGURATIONS: WWA — axial leads; The fluid is contained in a closed WWP—parallel leads; WWR—radial leads; vessel. A port above the fluid level WWI—lug style terminals; WW-RB—military PRODUCTS is the air entry. A valve in the com- style with lug terminals; HWA and HW-RB— INC. high temperature applications. pressed air line is opened and closed by a timer when a case is in filling 1300 28th AVE. MILITARY SPECIFICATIONS: Surpasses COLUMBUS, NEBRASKA MIL-R-93B, characteristic A and B; position. 9444. As the air pulse enters the vessel, Write for Bulletin R-26 the air pressure forces out a pre-

84 CIRCLE 55 READERS SERVICE CARD February 13, 1959 — ELECTRONICS ...for Complete Reliability Under Severe Environmental Conditions

Operator cobr-codes cases with ink pad as she removes them from turntable

M IAft (

Case-filling station. Light source and photocell are at left and right edges of photo

TYPE 750 TRIMMER POTENTIOMETERS Super-Miniature, Wire Wound, Precision

The 750 trimmer, with a completely TYPICAL DERATING CURVE sealed case and welded construction, Rear view of air plumbing offers outstanding performance and ,00 stability. 3 It has a space saving design for ad- 2 75 determined amount of fluid. The vanced electronic circuits where it's SO mandatory to meet demanding con- z, 25 fluid escapes through a tube with ditions of miniaturization, relia- " O one end immersed in the fluid and bility, precision and severe operat- 75 125 I 5 125 2 5 ...fee Ewe DEG CENTIGRADE the other end above the case. ing conditions. Two terminal styles available: 750W JUST ASK US Air pulses are initiated by the —with leads extending from end of The DALOHM line includes precision re- turntable on which the empty cases case; 750WP—with leads extending sistors (wire wound and deposited car- are loaded. Each indexing of the from bottom of case for printed bon); trimmer potentiometers; resistor circuits. networks; collet fitting knobs and hys- turntable brings a case under the • Rated at 2 watts, up to 70 . C. ambient. teresis motors designed specifically for filling tube. A spring arm attached •Resistance range from 100 ohms to 30K advanced electronic circuitry. ohms. If none of the DALOHM standard line to a small snap-action switch feels meets your needs, our engineering depart- •Standard tolerance: -• 5%, closer toler- for a case. If the case is in position, ment is ready to help solve your problem ance available. in the realm of development, engineering, fluid begins flowing from the tube. OPERATING TEMPERATURE RANGE: design and production. The switch operates asolenoid valve —55" C. to 175 C. Just outline your specific situation. admitting air to vessel and forcing SUPER-MINIATURE SIZE: .180 x .300 x 1.00 inch. Write for Bulletin R-41 out fluid. RESOLUTION: .1% to 1%, depending on The first drop of fluid is detected resistance. by a photoelectric cell which trig- SHAFT TORQUE: 5 inch/ounces max. gers the air pulse timer. After a BACKLASH: 10 maximum. SCREW ADJUSTMENT: 18 turns, nominal. given length of time, the timer then DALE MOUNTING: Individually or in stacked closes the solenoid air valve, shut- assemblies with standard 2-56 screws. PRODUCTS ting off the air and exhausting the SAFETY CLUTCH: Clutch arrangement on air in the vessel to atmosphere. movable wiper contact prevents breakage due to over-excursion. INC. Pulse is approximately 11 seconds. 1300 28 ,I, AVE. WEIGHT: 1.8 grams. COLUMBUS, NEBRASKA At the same time, the indexing MILITARY SPECIFICATIONS: Surpass mechanism is triggered to bring applicable paragraphs of MIL-R-19A, MIL- the next empty shell into position. R.1 2934A, MIL-E-5272A and MIL-STD-202A.

CIRCLE 56 READERS SERVICE CARD ELECTRONICS — February 13, 1959 85 ON THE MARKET

Processor Control system consists of a sealed for oscillograms thermistor sensing unit and a transistorized control amplifier CONSOLIDATED ELECTRODYNAMICS in the electrical compartment. The CORP., 300 N. Sierra Madre Villa, 23-109A has a knob adjustment Pasadena, Calif. A thermistor that will vary the bath tempera- drum temperature control is one ture. The processor also features of several new features on the portability and simple operation. 23-109A oscillogram processor. Circle 200 on Reader Service Card.

Magnetic Amplifier sensing devices as thermocouples, strain gages, bolometers, as well high sensitivity as for high impedance d-c sources. AIRPAX PRODUCTS CO., Seminole Di- Each provides a power gain vision, Fort Lauderdale, Fla., has greater than 50 db and a full developed a new line of PREAC linear output of 2 y into a 5,000 60-cps high sensitivity magnetic ohm load with null drifts as low amplifiers. Each of the four types as 0.03 »a, 2.25 x 10 w, referred available can be used by itself or to the input. Circle 201 on Reader as a preamplifier for such data Service Card.

Terminal Blocks number of terminals. It is molded of glass-filled Alkyd plastic (type through-connection MAI-60) as per MIL-M-14E. The KULKA ELECTRIC CORP., 633 So. Ful- molded-in threaded studs are of ton Ave., Mt. Vernon, N. Y. Type manganese-bronze. It is supplied 7TB12 heavy-duty terminal block with slotted brass nuts made to provides for feed-through connec- specifications, packaged separately tions at top and bottom, and comes or supplied assembled, as desired. in several different lengths and Circle 202 on Reader Service Card.

Sweep Generators Designed for production test or developmental checkout applications, high-precision the units are engineered with crys- TELONIC INDUSTRIES, INC., Beech tal controlled single frequency, or Grove, Ind. A new line of sweep harmonic plug-in markers, with ex- generators feature exceptional flat- ternal marker provisions. Circle ness, high output and low leakage. 203 on Reader Service Card.

Power Supplies Grove, N. J. The new Magitran line of high current, high voltage, regu- transistorized lated power supplies combine the ELECTRONIC RESEARCH ASSOCIATES, characteristics of the magnetic and INC., 67 Factory Place, Cedar transistor regulator. These units

86 February 13, 7959— ELECTRONICS The new Model A-12 DC Amplifier is the

preferred systems link for amplification, New normalization and impedence transformation. Use of solid state elements assures Electro Instruments maximum reliability; power dissipation is only seven watts. Mil-type components A-12 DC amplifier are mounted on coated plug-in printed circuit boards for protection against vibra-

totally transistorized tion and corrosion.

equal to or better than the best versatility plus economy Electro Instruments produces vacuum tube instruments! aseries of plug-in mode selectors and attenuators for the A-12: single ended, differential and operational, fixed and variable gain.

Eight to a rack The A-12 is packaged for high density use; mounts eight across in 19" relay rack panels. z

SPECIFICATION SUMMARY

Single Ended Input Write today for Gain: Fixed gain set to any value from 10 to 1000 inclu. sive by front panel plug-in units. Gain switching complete plug-in attenuator available with gains of 0, 10, specifications on 20, 50. 100, 200, 500 and 1.000. Adjustable up• ward 6db from setting with potentiometer. single-ended, Input Impedance: 100 megohms shunted by 0.001 mfd (typical). differential and Source Impedance: 5K or less (to meet noise specification). operational models. Drift: Less than 2 microvolts in 200 hours at constant ambient temperature. Less than 0.4 microvolt per degree centigrade. Ambient Temperature: 0* to 50°C. Noise (Referred to input): 0-3 cps 5 microvolts peak to peak 0-750 cps 4 microvolts rms. 0-50 kc 8 microvolts rms. Frequency Response: -±3db to 50 kc (typical); ±1.0% to 2 kc Output Capability: 2:10 volts at ±100 ma DC or peak AC to 10 Ito

35-40 Aero Court San Diego 11, California

ELECTRONICS — February 13, 1959 CIRCLE 57 READERS SERVICE CARD 87 provide full automatic protection against all types of short circuits All the right connections for or transients, either on an intermittent or continuous basis, and recover instantaneously. Circle 204 on Reader Service Card.

AMAZING 1 PERFORMANCE

Encapsulation System cuts reject rate EPDXY PRODUCTS, INC., 137 Coit St., Irvington, N. J., has developed a new, all-epoxy encapsulation system that drastically reduces both assembly time and reject rates on electronic components. Called the E-Pak system, it consists of an all- epoxy header with embedded lead wires, a cured epoxy shell and a premetered epoxy pellet. All three parts of the system may be custom-made for particular require- The hand can be quicker than the eye with ments. The all-epoxy cover Deutsch DM9700 series miniature push-pull plugs. replaces the conventional glass-to- These master performers, with the exclusive metal header in this type of pack- Deutsch ball-lock coupling ring, simply push-in aging. Circle 205 on Reader Serv- for positive lock and seal... pull-back for ice Card. instant disconnect.

Deutsch miniature plugs take the guesswork out of your application. Like magic, they withstand temperature extremes of from —67 to 250 F.; physical shocks up to 100 G's; and are unaffected by altitude pressure variations.

Inside the DM9700 shell is the secret: Voltage Rating . . Flashover 2,500 V-DC and 2,000 V @ 60 CPS (AC-RMS) Current 7 5 amps @ 2 volts AC Contact Resistance 9.7 millivolts @ 7.5 amps Meets or exceeds requirements of MIL-C-5015C Rotary Switch

Electrical wizards can get the inside information high-performance on these 3, 7, 12, 19, 27, 37, and 61 contact MASON ELECTRIC CORP., 3839 Ver- Deutsch miniature plugs—and their stellar dugo Road, Los Angeles 65, Calif. partners, the DM9600 series miniature push-pull A high-performance rotary switch receptacles and DM5600 series miniature only 17, in. in diameter and de- hermetic receptacles—just as quick as a wink. signed for high reliability is an- o nounced. Rated 5 amperes, 208 d-e, 400 cps, the switch provides Ask for data file 2-8. And don't forget—big news awaits you at the IRE Show, March 23-26. 8 positions. It can be built up to 6 wafers in length, giving a total The Deutsch Company of 48 separate circuits. A wafer has from 1to 4 rollers, permitting 7000 Avalon Boulevard •Los Angeles 3, Calif. 4 poles, 2 positions in a single (Continued on p. 92)

88 CIRCLE 58 READERS SERVICE CARD February 73, 7959 — ELECTRONICS 11111111» Ill MINIM 1111111111M1111 11111111111111113•1111111111111 111111111111111 MEE

A NEW DIMENSION IN COMPUTER TECHNOLOGY

Never has so vast and complex a project been military operations — global, in seconds. This undertaken in data processing and data com- project demands a wealth of engineering im- munications. Billions of bits to be handled agination. It will result in creation of a wholly .. . information flowing in from hundreds of new technology in digital computer science. electronic sources, processed by digital tech- If your interests as an engineer lie in elec- niques, displayed, solutions and commands tronic systems engineering, in data processing issued .. . in precious seconds. and communications, you will find in this pro- A very short time ago we were anewly created ject unusual opportunity to express imagina- subsidiary of International Telephone and Tele- tion and creative competence, in a degree graph Corporation. Today we are a purposeful surpassing anything previously undertaken in engineering management group actively forg- computer engineering. ing ahead with the myriad problems of our To obtain information on engineer challenging project. openings write A. J. Crawford, Per- As systems manager we are charged with the sonnel Manager. A resume of your development and production of a world-wide education and experience is essential. electronic control system which will transmit, An interview will be arranged at your process and display information required in convenience.

ru i INTERNATIONAL ELECTRIC CORPORATION d Route 17 & Garden State Parkway, Paramus, New Jersey A Subsidiary of International Telephone and Telegraph Corporation

ELECTRONICS— February 73, 1959 91 wafer. Individual wafers may be bussed externally to meet any sequence requirements. The 2-wafer FLIGHT DATA and switch weighs only 8 oz. Unit is CONTROL completely resistant to acceleration, vibration and shock, with- ENGINEERS MAGNETIC AMPLIFIER standing 2 to 2,000 cps at an ac- ENGINEERING celeration to 60 g's, with no con- Cross new frontiers in system Theory, operating principles, and practical tact opening. Circle 206 on Reader applications of all types of magnetic Service Card. electronics at The Garrett Corpo- amplifiers, presented in language of the electronic circuit and systems engineer. ration. Saturable reactors, reactor-rectifier ampli- High-level assignments in the de- fiers, and reversible single-core amplifiers are covered. Gives basic information on sign and development of system elec- electric and magnetic variables, and characteristics of magnetic amplifiers. By G. M. tronics are available for engineers in Attura, Industrial Control Co. 224 pages, the following specialties: 200 Illus., $7.50 1. ELECTRONIC AND FLIGHT DATA SWITCHING CIRCUITS SYSTEMS AND CONTROLS A wide With Computer Applications choice of opportunities exists for Applies switching-circuit techniques to de- creative R & D engineers having sign of electronic systems using digital circuits, particularly computers and data specialized experience with control processing systems. Sequential systems, devices such as: transducers, flight data Karnaugh maps, Boo- lean matrices, and computers, Mach sensors, servo-mech- other topics are cov- anisms, circuit and analog computer ered. Includes a logical treatment of fun- designs utilizing transistors, magamps damental switching Panel Meter theory and many and vacuum tubes. worked-out examples. small size By W. S. Humphrey, 2.SERVO-MECHANISMS AND Jr., Sylvania Electric Prod., Inc. 264 pages, ASSEMBLY PRODUCTS, INC., Chester- ELECTRO -MAGNETICS Requires engi- 259 illus., $8.50 land, Ohio. Model 361 panel meter neers with experience or academic training in the advanced design, development Introduction occupies panel space of only 31 by 2 in. and projects only 3/16 in. and application of magamp inductors and to The dial and window are slanted transformers. MONOPULSE for easier reading and may be 3. FLIGHT INSTRUMENTS AND TRANS- First unified treatment of a special type of radar, giving you a sound theoretical basis illuminated through a translucent DUCERS in the field. Describes concept of direction- 1) DESIGN ANALYSIS Requires engineers finding by monopulse, and explains three rear window. Sensitivity ranges postulates which form a general theory of are 0-5 »a to 0-50 amperes, and capable of performance analysis monopulse operation. Dual-plane systems, monopulse antenna principles. Class I sys- 0-5 mv to 0-500 v. The meter slips throughout preliminary design with tem characteristics, and other topics are covered. By D. R. Rhodes, Radiation Inc. easily through a rectangular panel ability to prepare and coordinate re- 119 pages, 53 Illus., $6.00 hole and is held in place by rear lated proposals. screw-on clamps. It requires no 2) DEVELOPMENT Requires engineers ELECTRICAL skilled with the analysis and synthesis positioning holes for mounting MEASUREMENTS of dynamic systems including design studs. Circle 207 on Reader Service In Theory And Application of miniature mechanisms in which low Card. Revised edition of a widely consulted guide, friction freedom from vibration showing how principles of electricity and magnetism are applied to electronic in- effects and compensation of therm° struments. Gives you exact mathematical expansion are important. procedures, and a fresh treatment of errors, circuit equivalents of vacuum tubes, and 4.PROPOSAL AND QUALTEST other topics. By A. W. Smith; and M. L. Wledenbeck, Univ. of Mich. Fifth Ed., 307 ENGINEER For specification pages, 309 illus., $7.50 review, proposal and qualtest r BAND PASS FILTER î abr. 50 Kr ro 3(0 Sr analysis and report writing assign- 10 DAYS' FREE EXAMINATION IEPIIT- OU1PUT ments. Three years electronic, .ONTROL ELECTRONICS CO,INC electrical or mechanical experi- McGRAW-HILL BOOK CO.. INC., Dept. L-2-13 327 W. 41st St., New York 36. N. Y. ence required. Send me book(s) checked below for 10 days examination on approval. In (lays 1will remit for book(s) t keep, plus rev, cents ror delivery costs, Forward resume to: and return unwanted book(s) postpaid. (We DitY delivery costs it you (emit with this coupon —sanie Mr. G. D. Bradley return privilege.) TI Attura- - Magnetic Amp. Engrg., $7.50 Band Pass Filter RISE CO« PORIIIITION - Humphrey—Switching Circuits, $5.50 9851 S. Sepulveda Blvd. - Rhodes—Intro. to Monopulse. MOO miniature line Los Angeles 45, Calif. -..18mith—Elec. Measurements, $7.50 DIVISIONS: OeRINT) CONTROL ELECTRONICS CO., INC., 10 Name Stepar Place, Huntington Station, AiResearch Manufacturing—Los Angeles Address AiResearch Manufacturing—Phoenix L. I., N. Y., has added a line of AiResearch Industrial OILY Zone. State miniaturized band pass filters in Air Cruisers •Airsupply 'onipany Aero Engineering wide ranges of frequencies with AiResearch Aviation Service Position For price and terms outside U.S. impedance from 50 to 10,000 ohms, write McGraw-Hill Intl., N.Y.C. L-2-13 with a different input and output

CIRCLE 60 READERS SERVICE CARD CIRCLE 61 READERS SERVICE CARD 92 February 13, 1959 — ELECTRONICS ...supplying the following major airplane subsystems: Autopilot, Air Induction, Armament Control, Navigation, Surface Controls, Cockpit Indication and Pneumatic Static Pressure Correction.

The AiResearch centralized air data com- most complete air data computing system true Mach, altitude, rate of climb, total puting system integrates pneumatic, ever devised. It enables aircraft to operate temperature, dynamic pressure and alti- electronic, electrical and mechanical com- at maximum efficiency continuously. tude and Mach error. ponents on one of the Navy's fastest jets. Eliminating duplication of components, AiResearch has been the leader in the It senses, measures, and automatically the AiResearch centralized air data com- development of centralized computing corrects all air parameters affecting flight. puting system cuts down space and weight systems. The F4I1-1 installation is the It supplies air data information to the requirements over decentralized systems first, single package air data computer pos- pilot and all major airplane subsystems. by many times. Its principal functions: sessing completely interchangeable, mod- This centralized combination of trans- angle of attack, true static pressure (elec- ular construction. ducers, computers and indicators is the trical and pneumatic), true air speed, Your inquiries are invited.

ENGINEERING REPRESENTATIVES: AIRSUPPLY AND AERO ENGINEERING. OFFICES IN MAJOR CITIES THE GARRETT Compounamou AiResearch Manufacturing• D.'visions •• Los Angeles 45, California •Phoenix, Arizona

Systems, Packages and Components for: AIRCRAFT, MISSILE. ELECTRONIC, NUCLEAR AND INDUSTRIAL APPLICATIONS

ELECTRONICS — February 13. 1959 CIRCLE 62 READERS SERVICE CARD 93 impedance available for matching purposes. The BF-101 filter is flat within one-half db from 40 kc to 310 kc. It has an attenuation greater than 40 db at 450 kc and higher frequencies. Providing for an insertion loss of less than 1db, the filter maintains a constant impedance of 50 ohms within the pass band. Circle 208 on Reader Service Card.

Delay Chassis thirty-unit COMPUTER CONTROL CO., INC., 92 Broad St., Wellesley, Mass. Model DU-10, a 30-unit delay chassis, is The 6116/TE-39 ruggedized Reflex The 6940/TE-58 is identical to The 6845/TE-59 is similar in elec- fully compatible for use with the Klystron thermally tunes o band of 8500 the 6116, but has special character- trical and mechanical characteristics to 9660 MC by means of o diode within istics limiting spectrum width and to the 6116 but may be operated company's series T digital mod- the vacuum envelope. Tuning speed over spectrum continuity under adverse under pulsed conditions with mini- the required frequency range is 0.7 load conditions. mum frequency modulation. ules. It contains 30 separate elec- seconds min. to 3.0 seconds max. trical 1-ihsee delay lines conven- iently packaged in a standard 19 by U in. rack mounting chassis. BENDIX RUGGEDIZED REFLEX Each delay line is completely independent. The lines can be used separately or joined in series by KLYSTRONS simple taper pin jumper connections to form the desired total delay. Circle 209 on Reader Service WITH THERMAL TUNING Card.

The 6116/TE-39 Klystron tube com- repeatedly cycled throughout its bines ruggedized construction and tuning range without damage or thermal tuning. The combination pro- deterioration. vides a desirable tube for use in air- These Reflex Klystrons are but one borne radar and similar applications. example of how Bendix Red Bank Ruggedization makes possible a frequency jitter of less than ± 1.3 MC technology can help you meet spe- .. . at vibration levels up to 10 G at cialized tube needs. For information 50 cps. Thermal tuning provides a on these tubes .. . and on backward- twofold advantage. It permits tuning wave oscillators and traveling-wave the tube over its entire operating fre- tubes .. . write RED BANK DIVISION, quency remotely without mechani- BENDIX AVIATION CORPORATION, cal means—and the tube can be EATONTOWN, NEW JERSEY. Voltmeter

West Coast Sales & Service, 117 E. Providencia Ave., Burbank, Calif. measures static Export Sales & Service: Bendix International Division, 205 E. 42nd St., New York 17, N.Y. Canadian Distributor: Computing Devices of Canada, Ltd., P.O. Box 508, Ottawa 4, Ontario MONROE ELECTRONIC LABORATORIES, INC., Middleport, N. Y. The ability to measure the voltage of an electrostatically charged surface with- v""Pee'ennee Division vigtinofi9, out touching it is now made pos- AVIATION CORPORATIOh sible with a new voltmeter. The

94 CIRCLE 63 READERS SERVICE CARD February 13, 1959 — ELECTRONICS r _

• 1 - 1111111 I A B 111111 CONNECTIONS

NEW FUNNEL FLANGE eyelets designed especially as connectors for Eyelets give you unlimited opportunities for savings PW boards. Solves two-sided circuitry and solder problems. Speeds as connectors, fasteners, terminals, bushings, contacts Insertion. Are fed and set automatically on United Machines. for switches and hundreds of similar applications. Only with United Eyelets do you have such a wide choice of standardized sizes, special designs for cutting costs on unusual production problems, combined with a comprehensive line of the most versatile eyelet setting machines available. In no other way can you get the flexibility obtainable with eyelets at comparable installed costs. Call or write us today for more information. Our national sales and service organization is ready to help with your most challenging problem.

NEW MINIATURIZED EYELETS as CUT COSTS WITH SHEARED EYE. connectors and fasteners for low cost, LETS as stand-off terminals. Set as high speed insertion in components, PM/ many as 3000 terminals per hour. boards, miniature equipment. Designed Cuts soldering time too. for high speed automatic feeding with United Machines. Copper or brass. Simultaneous multiple eyeleting from either or both sides of machine. Typical six eyelet application illustrated. 50 years' experience is your ,. ,ossurance of complete dependability.

New Eyelet Catalog contains cost- cutting ideas for designers and production engineers. Write for your copy today. SHOE MACHINERY CORPORATION

Boston 7, Massachusetts • Liberty 2-9100

&cliches: Atlanta, Ga. • Chicago, III. • Cincinnati, Cleveland, Columbus, Ohio • Dallas, Texas • Harrisburg, Pa. • Johnson City, N. Y. • Los Angeles, Calif.

Lynchburg, Va. • Milwaukee, Wisc. • Nashville, Tenn. • New York, N. Y. • Philadelphia, Pa. • Rochester, N. Y. • St. Louis, Mo.

ELECTRONICS—February 13, 1959 CIRCLE 64 READERS SERVICE CARD 95 equipment can be mounted wher- A IR PAX ever static is suspected and its presence not only established but actually measured. Measurements ELECTRONICS are made without contact of probe to surface and results are rela- INCORPORATED tively independent of distance from probe to surface being Note our name change: measured. A portable type instrument operating on the same prin- Formerly THE AIRPAX PRODUCTS COMPANY ciple is also available for use where probe can be located close

41111.11, to surface area being measured. Circle 210 on Reader Service Card.

''eRRef ,:,MPLIFI ER FERRAC Type M-943 LMEniat. ru

Zone Melter automatic apparatus

Airpax Ferrac amplifiers are exceptionally stable self- M ATERIALS RESEARCH CORP., 47 Buena Vista Ave., Yonkers, N. Y. contained ferromagnetic computing amplifiers. Frequency Model Z-81 zone melting apparatus response extends from DC to an upper limit determined is designed for quicker, easier by the input circuit. preparation of super-pure ma- Ferrac amplifiers are powered from 115 volt 400 or terials for semiconductor applica- 60 CPS sources and are unusually insensitive to fluctuations tions. It can be operated either in supply voltage or frequency. Potted for mechanical sta- vertically or horizontally to do bility and hermetically sealed for environmental protection, zone refining, zone leveling and their life exceeds 10,000 hours. Input (control) windings are crystal pulling. It is an integrated, electrically isolated and the output is insulated from the in- fully automatic, lightweight ma- put and ground. These features permit signal mixing, phas- chine which is safe and convenient ing, limiting, integrating and all analog functions necessary to operate. The extremely narrow for automatic control. melting zone, made possible by an induction coil transformer, en- Ferrac type M-943, illustrated, is for use in commercial sures precision control of the re- and military airborne control equipment and industrial fining operation. For low melting automatic controls where extremely stable operation is point solids, an elliptical reflector essential. Other Ferracs are available, with rectangular pac- furnace is available as optional kaging, having solder hook terminals and mounting studs. equipment. Circle 211 on Reader Service Card.

AIRPA)( Metal Film Resistors ELECTRONICS gas-filled C' W ESTON INSTRUMENTS, Division of P 0 Daystrom, Inc., Newark 12, N. J.

5M14 Addition of an inert gas to hollow tube Vamistors has permitted SEMINOLE DIVISION, FORT LAUDERDALE, FLORIDA doubling of ratings without any

96 CIRCLE 65 READERS SERVICE CARD February 13, 1959 — ELECTRONICS ...with Positive Detent Action

This fully enclosed one inch diameter miniature Grayhill tap switch, designed for high reliability in mili- Series tary and commercial applications, provides 2/3 ACTUAL SIZE 24 accurate indexing by precision detent mechanism.

One to 10 decks, 2 to 10 shorting or non-shorting

positions per deck. 36 ° indexing. Break 1 amp. 115 V. AC, or

carry 5 amps. Has passed many military environmental Announcing anew series tests including explosion test per MIL-E-5272A of standard delay lines: Procedure I.

Write for Complete Specifications

elyke

Phone: Fleetwood 4-1040 523 Hillgrove Ave., LaGrange, Ill.

IONEERS IN MINIATURIZATION •• CIRCLE 66 READERS SERVICE CARD DELAY LINES

...a complete miniature series mounting horizontally or vertically... sending abill? stackable for higher delays, and with tap-off points for lower delays. It'll get there quicker if you Molded in epoxy. give your postal delivery zone number with your address.

DELAY BANDWIDTH product per cubic inch: The Post Office has divided as high as 7.5. RANGE OF DELAYS—from .05 to 1.0 »sec. 106 cities into postal delivery Higher delays when stacked. IMPEDANCE RANGE—from 500 to 2000 ohms. zones to speed mail delivery. CHASSIS OR PRINTED CIRCUIT MOUNTING. Be sure to include zone number MAINTAINS DELAY TOLERANCE over temperature range of —55 C to -• 125' C. when writing to these cities ; be WORKING VOLTAGE: 500 VDC. HUMIDITY: Meets MIL-C-15305A, Grade 1, Class B. sure to include your zone SPECIAL DELAY LINES—quotations on request. number in your return address

—after the city, before the Send for Bulletin 140. state. Yir ELECTRONICS, INC. 2979 N. ONTARIO ST.. BURBANK. CALIF.

MANUFACTURERS OF INDUCTIVE DEVICES FROM POWER TO RADIO FREQUENCIES, PULSE CIRCUITRY COMPONENTS, MAGNETIC AMPLIFIERS & POWER SUPPLY MODULES

CIRCLE 67 READERS SERVICE CARD

ELECTRONICS — February 13, 195? 97 increase in size of these precision metal film resistors. The new models 9854 and 9855-4 Missile Line Vamistors were specially designed for use in transistor circuits, aircraft and missile gear, computers, and other precision instruments requiring a high degree of stability and miniaturization under extreme environmental conditions. Circle 212 on Reader Service Card.

Indicator Tube rugged design

BURROUGHS CORP., P.O . Box 1226, ...now wind 19,000 times! Plainfield, N. J., announces production of a Nixie indicator tube with life of more than 10;000 hr. If you're dedicated to the cause of high resolution, you could wind Type B-5031 is an all-electronic your own pots and be sure. Allow yourself plenty of time, though — indicator which presents the ten because the secret's in the number of turns per inch, and the spacing numerals (0 through 9) in a com- between 'em. Pack those turns right in there closely and accurately. mon in-line viewing area. It is and you might have apot you'll be proud of! similar in mechanical and electrical characteristics to the stand- But if you want to eliminate all bother, but ard type 6844-A. The only change not the high resolution, call on Ace! We've required to make the tubes inter- designed and built our own special winding changeable is a reduction in the equipment; we use premium. close tolerance value of series anode resistance resistance wire — and really leave no wind- under rated operating conditions. ing unturned to produce pots with the highest Circle 213 on Reader Service Card. resolution in the industry. All AlA sizes, all mounting styles, specials and standards. So get your resolution the easy way — get Tracer Drives Acepots! See your ACErep at once! for machine tools Here's highest resolution in astandard sub-miniature pot: The 500 RELIANCE ELECTRIC AND ENGINEER- Ace pot® V2" size, -±-0.3% independent linearity. Special prototype ING CO., 24701 Euclid Ave., Cleve- section insures prompt delivery on the Acepote —Yz" to 6'; AIA sizes. land 17, Ohio, announces a new line of electronic tracer drives applicable to machine tools as feed

.-141141 ELECTRONICSDover Stree t,44, drives on tracing operations. The VS tracer drives are available SOmereet 6-5130 TMX SMVL 181 West. Union WUX with single-axis, dual-axis and

I 4illie Acepot® Acetrine Acetate Aceohme 'Reg. Appt. for full two-axis travel. The three

98 CIRCLE 68 READERS SERVICE CARD February 73, 1959 — ELECTRONICS types of drives are offered to meet ALLIED'S NEW ADDITIONS TO THE all types of tracing requirements, which vary in complexity. Each KH SUBMINIATURE LINE drive unit consists of a tracing template follower; an operator's Types KHJ and KHY station; a packaged, cabinet- GENERAL FEATURES: mounted control unit; and con- Contact Data: Contact Arrangement—DPDT trolled variable-speed d-c feed Contact Rating— motors. Circle 214 on Reader Serv- Low-level up to 2 amps at 29 volts d-c, ice Card. 1 amp at 115 volts a-c 400 cps non-inductive or 0.5 amp inductive. Life-100,000 minimum at 125 °C Also available 3 amps at 29 volts cl -c 2 amps at 115 volts a-c 400 cps non-inductive or 1 amp inductive. Life-100,000 ot 3 amps or 500,000 minimum at 2 amps at 125 °C. Initial Contact Resistance-0.05 ohms maximum Contact Drop-1 millivolt maximum at low level rating, initial and during low level miss test. Operate Data: D-C Coil Resistance—up to 10,000 ohms Nominal Power-1.2 watts Electronic Chopper Pull-in Power-240 milliwatts (standard) transistorized 100 milliwatts (special) Operate Time-5 milliseconds max. Allied's type KHJ and Release Time-3 milliseconds max. SOLID STATE ELECTRONICS CO., 8158 KHY subminiature relays Dielectric Strength: have ahigher contact Orion Ave., Van Nuys, Calif. 1000 volts rms at sea level Model 70 silicon transistor chopper 500 volts rms at 70,000 feet rating than Allied's (or modulator) is a solidly encap- 350 volts rms at 80,000 feet original subminiature relay and are designed to sulated unit designed to alter- Insulation Resistance: 10,000 megohms minimum at 125 °C meet the increased nately connect and disconnect a ENVIRONMENTAL FEATURES vibration and shock load from a signal source. The requirements of the unit may also be used as a de- Vibration: 5 to 10 cps at 0.5 inch double amplitude latest MIL specs. In modulator to convert an a-c signal 10 to 55 cps at 0.25 inch double amplitude addition, the type KM to d-c. It is capable of linearly 55 to 2000 cps at 20 g relay has incremental grid Shock: 100 g's operational • 200 g's mechanical switching or chopping voltages spaced terminals for Ambient Temperature: —65 °C to +125 °C application to "Auto- over a wide dynamic range which MECHANICAL FEATURES mation" assembly. Both extends down to a fraction of 1my relays are available Weight: 0.5 ounce and up to 10 v. Unit is an inertia- with brackets for mounting Terminals: less device that can be driven Hooked Solder • Plug-In • Printed Circuit interchangeable with that from d-c to hundreds of ke. Circle Mountings: of Allied's type KH 215 on Reader Service Card. 2 or 4 hole brackets at base or center of gravity subminiature relay. 1 or 2 studs on top or side of housing MILITARY SPECIFICATIONS MIL-R-25018 • MIL-R-5757C

Plastic Ties for wire bundles

WESTINGHOUSE ELECTRIC CORP., East Pittsburgh, Pa., has available a new cost-saving plastic tie to bind wiring harnesses neater and faster. Made of Nylon base Moldarta material, the new flexible tie offers many advantages over the old string tie method. The ratchet-like design makes it self- ALLIED CONTROL ALLIED CONTROL COMPANY, INC., 2 EAST END AVENUE, NEW YORK 21, N. Y. adjusting to a wide range of wire Al. ISO

CIRCLE 69 READERS SERVICE CARD ELECTRONICS—February 13, 1959 99 bundle diameters. It will reduce the time required to tie a bundle by about 30 percent. The tie is I Announcing- fungus and moisture resistant resulting in a long useful life. Circle IERC's 216 on Reader Service Card.

RHL,7N1 A- Motor-Generator Set precise power ELECTRIC MACHINERY M FG. Co., Heat- Minneapolis 13, Minn., has developed a new 400 cycle, high per- Dissipating formance motor -generator set. Model 40 SG 50 is built particu- Electron larly for ground power support of missiles and jet aircraft. It is Tube complete with a free standing control cubicle which houses all con- Shields! trol components. Remote operation of the unit is easy with the separate control cubicle. Rated to deliver 50 kw of 400 cycle power, the unit is built with voltage regulation of -±-1 percent, harmonic content of 2 percent maximum and voltage recovery to within -±-1 percent within 0.25 sec. Circle 217 on Reader Service Card.

New THERMA-flex liner makes IERC's heat-dissipating tube shields cool electron tubes more efficiently!

IERC and government testing*, using latest techniques, proved THERMA-flex tube shield liners to be the most efficient heat-dissipating liners available! IERC THERMA-flex liners and tube shields will meet all requirements of MIL-S-9372 (USAF) and MIL-S-19786 (NAVY). In the shield, the broad areas of the liner attain a particular semi-eliptical precision spring curve. Tube insertion causes spring curve to flex and adjust to contours of bulb. This action grasps Vibrating Capacitor a major portion of tube surface, absorbing heat from hot spot which is transferred to shield and heat sink and dissipated by ceramic insulated conduction, radiation and convection. STEVENS-ARNOLD, INC., 22 Elkins THERMA-flex high-efficiency tube shield liners are available now for St., South Boston, Mass. In ap- most sizes and types of IERC Miniature Heat-dissipating Electron Tube Shields. pearance the VC-1006/500 is iden-

See NEL Reliability Design Handbook, Sec. 502 —"Improved Type tical to the VC-713/500 recently Miniature Tube Shields," OTS —Jan. 15, 1959 announced except that ceramic insulation is used in place of the RES. U.S. TRADE MARK considerably more expensive fused

PATENT f'FNDING quartz, resulting in a minimum insulation resistance of 10" ohms. International Electronic Research Corporation Further cost reduction has been 145 West Magnolia Boulevard, Burbank, California achieved by relaxing the contact potential and drift specifications Write for helpful, FREE, IERC Tube Shield Guide with over 1,200 tube to 30 mv maximum and ±--2 mv per and tube shield combinations to help you avoid thermal problems in your new equipment designs or retrofitting plans! day respectively; this is because cost of a vibrating capacitor is Heat-dissipating electron tube shields for miniature, subminiature and octal/power tubes. governed largely by the processing

100 CIRCLE 70 READERS SERVICE CARD February 13, 1959 — ELECTRONICS We insist on the Philbrick amplifier here is the world's smallest and simplest .for our new package" says Philbrick strip chart recorder! HERE'S PHILBRICK ON PHILBRICK "We use only the finest components in our products. That's why we insisted an MI» ea M▪.UUUUUUUUU UMW Nam on Phi/brick's new USA-3 Opera- tional Amplifier as asub-assembly for liii our new Analog Package, the UPA -2. ew - nall U. We have found it (the USA-3) nifty Mal We Mal and thrifty. recommend it without UMW reservation. And that goes for the M▪al BIM MUM anal A'C UI UPA -2 — too." •UUUUUUUUUUUUUaU I al IllalliaallIall10111111111111111•11•11111111111 PHILBRICK OPERATIONAL AMPLIFIER...USA-3 More performance per dollar than any other amplifier. Highly reliable — no electrolytic capacitors or glow tubes. • AMPLE STORAGE: Contains 63-ft. chart roll, or 31 days' recording at one Designed to prevent self-destruction even when the output inch per hour. Useful chart width 2V I6". is grounded. Drift, noise, offset under 100 microvolts. Output is ± 116 VDC. Wide frequency range—DC to 100kc (attenu. • ACCURATE: Galvanometer pointer swings free for maximum accuracy, abort less than 3db) when connected as again.of-ten ampli. being clamped briefly for marking. fier. 7" x2 /12 " printed circuit board mounts by several convenient methods. Price $95. • INKLESS: Recording process is completely dry, utilizing special pressure sensitive paper. Method provides remarkable definition. • RECTILINEAR: Advanced design provides true rectilinear recording free from distortion. • RELIABLE: Positive synchronous motor drive with sprocket engaging holes in paper for accurate time indication. • VERSATILE: Portable or panel mounting models. Stocked in a variety of scales and chart speeds.

WRITE TODAY FOR LITERATURE

• Subject to change without rust industrial co., inc. notice. 130 Silver Street, Manchester, N. H. CIRCLE 71 READERS SERVICE CARD

RIBBONS •STRIPS

— of — * PURE TUNGSTEN * THORIATED TUNGSTEN * MOLYBDENUM * SPECIAL ALLOYS

and OTHER METALS IN ULTRA THIN SIZES to TOLERANCES CLOSER THAN COMMERCIAL STANDARDS by

OUR SPECIAL ROLLING TECHNIQUE PHILBRICK UTILITY PACKAGED AMPLIFIER UPA -2 Note: for highly engineered applications—strips of TUNGSTEN Combines new level of flexibility and convenience. Perform. and some other metals can be supplied unce characteristics same as the USA-3 amplifier, the heart of this package. Can drive 12.000 ohm load to 100 volts in either direction. Designed for 3/12 "rack mounting but can be ROLLED DOWN TO .0003 THICKNESS used equally well as abench amplifier, or plug-in assembly without modification. Use it for analog computing. measure. • Finish: Roll Finish—Black or Cleaned ment and control, continuous data reduction, • Ribbons may be supplied in Mg. weights if required and many other feedback operations. Price $149. Write for technical literature and advice on your For HIGHLY ENGINEERED APPLICATIONS application. DEVELOPED AND MANUFACTURED BY GEORGE A.

PHILBRICK — 5 SEEKMAN ST.. N. Y. 38. N. Y. RESEARCHES, INC. CO 6-5375 TILIP.ONt WOrth 2-2044 285B Columbus Avenue, Boston 16, Mass. H.0 ROSS CO. ' COrflonclf 7-0 470 'THE ANALOG WAY IS THE MODEL WAY CIRCLE 72 READERS SERVICE CARD CIRCLE 73 READERS SERVICE CARD

ELECTRONICS — February 13, 1959 101 LOOK TO TOBE FOR PROGRESS needed to obtain a specified level of performance. Price is $75 each in quantity. Circle 218 on Reader Service Card. 600,000 Iamperes help harness ,H-power

Selenium Rectifier encapsulated INTERNATIONAL RECTIFIER CORP., 1521 E. Grand Ave., El Segundo, Calif. Type QM50 selenium rectifier features a rugged, phen- olic-encapsulated package which completely seals rectifier cell surfaces; assures positive insulation from other chassis components. The new molded rectifier has rectified d-c output current rating of 50 ma, with a maximum rms input voltage of 130 v. Stud mounting of the unit insures ease of mounting and wiring to chassis. Circle 219 on Reader Service Card.

At the recent Geneva Atoms-For- Why Tobe capacitors? Because only Peace Conference, Los Alamos sci- Tobe, with over 30 years of capaci- entists unveiled Scylla—a fusion de- tor manufacturing experience, could vice used to heat aplasma of ionized meet the rigid design specifications heavy hydrogen particles millions of set for the project. Tobe can meet degrees by blasting it with a600,000- yours too. So, whether you need a ampere thunderbolt. bank of thermonuclear energy-storage capacitors or a miniaturized Transistor Radiator Surrounding the heart of this ther- tubular, talk to Tobe. Our engineers monuclear machine is a bank of for diamond shapes speak your language. Tobe low-inductance, energy-storage THE BIRTCHER CORP., 4371 Valley capacitors...each rated at 100,000 For further technical information Blvd., Los Angeles 32, Calif. A volts each capable of a20,000 mega- or engineering aid, write Tobe- heat dissipation device designed watt peak surge. Deutschmann Corp. Norwood, Mass. for diamond shape power transistors has been developed. The 3B- 663 radiator consists of a series of 0 black ebanol finished metallic spec. radiating fins mounted on a base plate which is interposed between i the transistor and the chassis. It fr may be used with or without a PRODUCTS mica insulating washer. The device attaches to the chassis with

TOBE DEUTSCHNIANN • CAPACITOR PIONEERS SINCE 1922 four bolt posts and in no way inter-

102 CIRCLE 74 READERS SERVICE CARD February 13, 1959 — ELECTRONICS work' in'the fields pf the future at NAA You Expect the Best and GET IT from ESTERLINE-ANGUS

For Over Fifty Years the Leading Maker of High-Quality, Heavy-Duty, Direct-Writing Pen and Ink Recording Instruments

AC, DC and DC Milliammeters AC-DC Kva and Varmeters Ammeters Speed Voltmeters Pressure Wattmeters Vacuum Frequency Operation (20 Pen) Power Factor Contact-Making Instruments

Ask for Catalog No. 657

Product Representatives in Most Principal Cities ELECTRONIC SYSTEMS The ESTERLINE-ANGUS Company, Inc. ENGINEERS Pioneers in the Manufacture of Graphic Instruments Il )i-k on America's most DEPT. E, P.O. BOX 596, INDIANAPOLIS 6, INDIANA advanced weapon systems At North American Aviation CIRCLE 75 READERS SERVICE CARD work on such top-level projects as the B-70 and F-108 weapon systems and the X-15 manned space aircraft has created unique careers with a tremen- itUGéE0 and RE1/48LE dous engineering potential. Openings exist for Top-Level Systems Engineers New! MINIATURE ELECTRONIC interested in performing ap- TIME RELAY RELAYS plied research for the labora- 31200 SERIES tory evaluation of such complex TRANSISTOR/ZED electronic systems as fire control. bombing systems, mission A. W. HAYDON COMPANY'S and traffic control systems, air SUIWAIINATIIRE ELECTRONIC data, and automatic flight con- TRANSISTORIZED SUB-MINIATURE TIME DELAY RELAYS trol. Evaluation consists of the 31300 SERIES integration of related electronic ELECTRONIC TIME DELAY RELAYS! systems and related interference problems. SAVE SPACE AND WEIGHT! Other top-level positions are available in radome develop- Miniature Sub-Miniature Series Series ment. antenna development,

Cross Section 1E/16" X PYgg" 31/32 " x IM 6" and infra-red. Length 2/14 " long 2" long Minimum requirements are ac- Weight 6ounces 3ounces tual experience plus B.S.. or Bulletin Bulletin advanced degree in E.E. and WRITE FOR: AWN 10.503 AWN ID-504 Physics. TEST-PROVED PERFORMANCE! For more information please High Temperature: 125 ° C 1250° H write to: Mr. F. B. Stevenson, Vibration: 2000 CPS at 15 g. Contact arrangements up to 4 pole double throw. Engineering Personnel, North Unique transistorized R.C. time constant network. American Aviation, Inc., Los Time Delays from 50 MS to 120 seconds. Longer Delays available. Hermetically sealed housings. Angeles 45, California.

THE LOS ANGELES DIVISION OF

MEET 57. t II % A ----Y------II 1% NORTH REQUIREMENTS .e1AYDON ecimft.eutet . A, A OF MIL-E-5272A. AMERICAN ilea NORTH ELM STREET, WATEREURY 20, CONNECTICUT X Design and Mantel oclure of Eleciro-Mechonical timing Dank. AVIATION, INC.

CIRCLE 76 READERS SERVICE CARD ELECTRONICS — February 13, 1959 103 feres with servicing or operation of the transistor. It is reported to be ideal for use above ground potential. Circle 220 on Reader Serv- ice Card. ANOTHER NEW ROSTER OF OPPORTUNITIES APLENTY AT BURROUGHS Again we are stepping up our aggressive research and development programs. These have already made us a $300-million-a-year force in advanced electronic and electro-mechanical information processing for both commerce and defense. Here are just a few of the many exceptional career opportunities open right now for exceptional men:

CALIFORNIA at our Dept. 201B, Burroughs Corporation Research Center, Paoli, Pennsylvania. ElectroData Division in Pasadena Power Supplies Electronic Engineers with experience PENNSYLVANIA at our Mil- in areas such as logical design, com- transistorized itary Field Service Division in Phila. puter components, circuit design, elec- SOUTHWESTERN INDUSTRIAL ELEC- tronic packaging, sub-miniaturization, Field Engineers responsible for the TRONICS Co., 10201 Westheimer, manufacturing costs and processes. direction of several field teams in installation and maintenance of digital Houston, Texas, has introduced Electronic Data Processing Special- computers and integrated data pro- the TPC-18 and 19 transistorized ists with experience in areas such as cessing systems. Required BSEE, with power supplies. They are designed applied programming, applied math- extensive field service experience in specifically to replace 14 and 28 v ematics and technical sales consul- military electronic equipment. tation, etc. D-10A dynamotors in the supply Site Engineers to attend formal lab of power to aircraft communica- For Details, write Mr. C. J. Blades, and lecture training program of 16 Manager, Professional Employment, weeks in electronic data processing tions and navigation receivers. Dept. 201A, Burroughs Corporation equipment at full salary. Assignments Both utilize a transistor multi- ElectroData Division, 460 Sierra after completion of formal program vibrator circuit to deliver 250 Madre Villa, Pasadena, California. plus field training will involve direct d-c and 100 ma -at over 80 percent supervision of afield team in installation and maintenance of data process- efficiency with regulation better PENNSYLVANIA at OUT ing equipment. BSEE preferred, or than 10 percent. The transistor Research Center near Philadelphia equivalent experience. Must be willing circuitry is not only completely to travel and relocate. Systems Engineers with specific reliable due to the absence of experience in systems analysis and For Details write Mr. A. J. Bellace, moving parts, but also incorpo- design of digital data processors. Employment Supervisor, Burroughs rates protection against overload Should be trained in engineering, Corporation Military Field Service or short circuits. Circle 221 on physics or mathematics. Graduate Division, Dept. 201C, Burroughs training desirable. Drive, Radnor, Pennsylvania. Reader Service Card.

Mathematicians, computer-oriented, at our Burroughs with particular experience in problem MICHIGAN formulation, numerical analysis, and Division in the Detroit Area applied mathematics—in connection Experienced Electronic, electrical with formulation and design of com- and mechanical engineers to work in putational procedures. Procedures in- many areas of research and develop- volved in problems of guidance and air ment for information processing equip- defense, trajectory calculations, logical ment applicable to commercial and design, sampled data systems, circuit military use. analysis and more. Advanced degree in mathematics preferred. For Details, write Mr. A. L. Suzio, Administrator, Corporate Placement For Details, write Mr. James Gilroy, Services, Dept. 201, Burroughs Corpo- Professional Placement Coordinator, ration, Detroit 32, Michigan. Commutator for missile uses

APPLIED SCIENCE CORP. OF PRINCE- TON, P.O .Box 44, Princeton, N. J. The command commutator is a spring-driven, rotary sampling switch that offers a number of im- Burroughs Corporation portant advantages for missile and space telemetering systems. Due

"NEW DIMENSIONS /N ELECTRONICS AND DATA PROCESSING SYSTEMS." to its precision, self-contained

104 February 13, 1959 — ELECTRONICS SANDERS

MINICUBE BLOWER OFFERS THE FINEST Blower and Motor in 1" Cube PROPERTY VALUES Cools and ventilates miniature equipment FOR FINER PRODUCTS APPLICATIONS Designed for use in aircraft and • Maintaining uniform flow of air in restricted spaces. missiles, this Sanders Minicube • Absolute Chemical • Preventing fogging of lenses and Purity Blower is ruggedly packaged . . . viewing glasses.

operates over wide ranges of vibra- • Eliminating hot spots around • Extreme Heat Klystrons and other electronic Resistance tion, acceleration and temperature. tubes and devices.

SPECIFICATIONS • Thermal Shock Input: 400 cps, 3 watts Speed: 22,000 rpm apprOn. Resistance Voltage: Model 1A — 6.3 volts Size: 1" x 1" x 1" • Chemical Inertness Model 2A —26 volts Weight: 1 1/4 oz • Outstanding Electrical For complete details about prices, delivery schedules, and conformance to military specifications, write: Properties 51:11713ERS RSSOCIRTES • Full Range Radiant

NASHUA, NEW HAMPSHIRE Energy Transmission

In laboratories and other applications where critical DAYTON, OHIO • INGLEWOOD, CALIFORNIA • WASHIN GTON, D. C. requirements must be met, CIRCLE 79 READERS SERVICE CARD there is no room for second best. Vitreosil possesses Quan-Tech's Transistor-Regulated Power Supplies properties of greatest value for: ultra -violet applications, metallurgical investigations, chemical research, photochemistry, spectrosco- py, and many uses in physical, optical and electrical research as well as product operations.

Vitreosil is available in an

Model 103 unusually wide variety of types and sizes—Or, we'll CI be happy to fabricate to your specifications. Write you can count on! us about your requirements You'll find Quan-Tech's low volt- MODEL 101 0-8 v. DC, 0.2 amps... Price $195 today. For your conven- MODEL 102 044 v. DC, 0.1 omp... Price $175 age, precisely-regulated power sup- ience, use the coupon be- MODEL 103 0-30 v. DC, 0- 1/2 amp... Price $175

plies ideal for laboratory use and MODEL 105 0-50 v. DC, 0- /14 amp... Price $205 low. See our ad in Chemical for specific applications. So light- Also Engineering Catalog. weight and compact. Take only a MODEL 104 0-50 v. DC, 0-1 amp... Price $375 THERMAL AMERICAN minimum of bench space. Short- All models, racks, special units — FUSED QUARTZ CO., INC. circuit current is held to a safe — including closer regulation, cur- >svITREOSIL 18-20 Salem Street, value, automatically. rent metering, etc. — furnished to Dover, New Jersey your specifications. Four models regulated from Please send technical data on -±0.25% or ±-25 millivolts for line Write or call us for complete informatión and load combined. Feature low ripple, low internal impedance, Company 1 s small size (8 /14 "x 5" x6 3/4"deep; - tzar.- ech Name weight, 7/12 lbs.). • A Street

City zone_State 1 QUAN-TECH LABORATORIES • Morristown, New Jersey mm CIRCLE 80 READERS SERVICE CARD CIRCLE 81 READERS SERVICE CARD ELECTRONICS —February 13, 1959 105 driving mechanism, the command commutator has no r-f noise generation, no gyroscopic effect, no heat generation and extremely low average power consumption. The commutator is hand-wound before a flight. It will make one complete sampling cycle for each command received. Circle 222 on Reader Service Card.

Anemometer hot wire type

SHAPIRO & EDWARDS, 1130 Mission St., South Pasadena, Calif. Model 60B hot wire anemometer is an instrument for measuring the velocity of an air stream, making use of the ability of the stream to absorb heat from an electrically heated thin wire filament. The The artist has captured arare expression on the face of Sigma's general wire filament forms one leg of a manager —one of happy satisfaction and complete contentment. This is Wheatstone bridge which is driven because the sales dept. has just told him (1) about a new Machine of Pleasure which uses a Sigma product and (2) that the customer is overjoyed by a d-c amplifier. A feedback because the Sigma product works right. His corporate corpulence is circuit maintains constant resist- enjoying every minute of it, while it lasts. By publicizing this latest applica- ance and temperature of the wire. tion triumph, it is hoped that others will be spurred on to similar successes. The energy input to the wire goes directly into the air stream. The

An enterprising consulting engineer on the West Coast recently took wire current is a measure of on the job of building a fully automatic machine for folding Chinese the instantaneous velocity. An fortune cookies. The specs called for handling a piece of hot, flexible output voltage is obtained across a cookie dough every five seconds ; folding it in two directions and getting fixed resistor in which wire cur- the fortune inside the cookie between folds ; using up 420 different rent is flowing. Frequency re- fortunes before repeating. The machine slices printed fortunes as required sponse of the model 60B extends from continuous rolls. It was at this point that consulting cookie engineer from d-c to 10 kc. Accuracy is 1 William E. Thomas asked his E. E. brother Frank how to keep the slices percent. Circle 223 on Reader between the lines ; since brother Frank reads Sigma ads, his immediate reply was "Sigma Photorelay" (we like to think). One was purchased and Service Card. rigged up to control the paper feed, by sensing black bars printed on the rolls. Brothers Thomas, their project engineer Charles A. Lindberg (honest!), their customer and Sigma are now all entranced by the results.

So one more banner should be raised for the unsung heroes whose accomplishments do not go up in three stages and adeafening roar, but simply "kerplunk" every few seconds as a new little item is unfailingly produced. If you have such aproject, and light sensing can be put to a useful purpose, a Sigma Photorelay might be worth trying. They come ready to plug in, switch 3amps. resistive at 120 VAC, cost only about $12.00; the cookie boys even went so far as to say "we certainly could not have installed anything else that worked properly so inexpensively." Who knows, maybe you could even build a machine to get the ordinate and abcissa Core Materials straight on hot cross buns. extended range THE POLYMER CORP. OF PENNSYL- VANIA, 2140 Fairmont Ave., Read- ing, Pa., has developed two new non-memory, inductive core ma- SIGMA terials which have been used suc- SIGMA INSTRUMENTS, INC. cessfully as antenna couplers at

62 Pearl St., So. braintree 85, Mass. intermittent service temperatures

AN AFFILIATE OF THE FISHER-PIERCE CO. Cam. »sin up to 350 C. Known as Ferrotron

106 CIRCLE 82 READERS SERVICE CARD February 13, 1959 — ELECTRONICS DELTA Deflection Air Freight

costs less than you think! YOKE7• Holds down inventories! Holds down costs of crating, specialists insurance, capital tie-up. Protects against deterioration COMPLETE LINE for every Military and and market declines! Special purpose . . . in PRODUCTION QUANTITIES . . . or CUSTOM DE- Delta's all-cargo fleet SIGNED to your specific requirement. carries most anything. 11-foot doors, FOR PP1 DISPLAYS Call Delta Air Lines TA ton capacity. Compact Rotating Coil Yoke or write General Offices: Atlanta Airport, Atlanta, Ga.

• af HI MOST COMPLETE ALL -CARGO SERVICE TO AND THRU THE SOUTH 28

CIRCLE 83 READERS SERVICE CARD Stock Type Y25 illustrated Special Purpose Wire

phosphor bronze ;e

BERYLLIUM COPPER ALUMINUM Silvercote

FOR ni -clad-ti CERAMIC-TO-METAL NICKEL CLAD (not plated TITANIUM WIRE BRAZING OTHER ROTATING TYPES available with fixed off-centering or rotating • OTHER NON-FERROUS off-centering. Many mechanical and

Consider WIRE and the importance of its function t.,:tett..4.ets electrical variations. in your product. Whether a highly engineered appli. FIXED TYPES with push-pull wind- cation or a simple stapling purpose, your choice of ings. Low current coils for slower the proper alloy or composition, temper and type sweep speeds. Low impedance coils of wire could mean success or failure during crucial for transistor drives. test. Neck diameter, core material, configu- round • flat — square at half-round ration, deflection angle and electrical design to your precise spec. For en- Precision gauges from to .002. Close tolerances held, gineering help,contact Dr.HenryMarcy SPRING WIRE — WIRE FOR INSTRUMENTS today. ELECTRONICS — STRAND FOR WIRE ROPE AND BRAIDED APPLICATIONS — MANDREL WIRE WIRE FOR FORMS — RIVETS —STAPLING Send for descriptive folder. svntronic LITTLE FALLS ALLOYS INSTRUMENTS, INC. INCORPORATED 186 Caldwell Avenue • Paterson 1, N. 3. 100 Industrial Road, Addison, Illinois Phone KIngswood 3-6444

CIRCLE 84 READERS SERVICE CARD CIRCLE 85 READERS SERVICE CARD ELECTRONICS — February 13, 1959 107 ferromagnetic materials, the cores are claimed to extend the operating range 75 C to 150 C over previously available compositions. Ferrotron materials are charac- terized by a positive Q coefficient and constant magnetic permeability. They have a volume resistivity higher than 10'° ohm-cm and high dielectric strength. The dielectric losses are low across the frequency spectrum. Circle 224 on Reader Service Card.

Expensive testing hours are saved by the accurate and complete test reports submitted with each ADC sample. The transformer illustrated above is typical. Specifications called for an output transformer for a high power, ultrasonic application. The sample was promptly submitted with complete test data and outline drawings. As is its custom, ADC also included the test circuit so that tha customer could see how the test data was obtained, Digiial Voltmeter and more easily verify test results. with fifth digit From sample design through production, you'll like the way .ADC fulfills your transformer and, filter requirements. KIN TEL DIVISION of Cohu Elec- tronics, Inc., 5725 Kearny Villa

Au arT99e4--- Road, San Diego 12, Calif. A fifth

AUDIO DEVELOPM ENT CO MPAN Y digit has been added to ensure

211111.01.4111 S0011,1011.110...erbou 1.0 1°"2e accuracy at the upper limit of each INGINEEPHO psi UPON range in the new model 501 digi- ouTeu.' ODU-foR AWING tal voltmeter. New instrument has an accuracy of 0.01 percent ±1 itsTs AS pou.oves I) TURNS RATIO LI! LI_ a digit in four automatic ranges 7-8 / se. from 0.0001 to 1000.0 I/ d-c. It re- 4-6 7-9 33 Pti6SiI46, JeorrivE vd rim 3 TtEo 1044 6 TIED TO 7 tains this accuracy even in the

3) PBT iit5,00000,V, ps :L 1,00 SCEACIEC._A SEp.-59:::E0 transition area between ranges. Circle 225 on Reader Service Card. 4) PRIC I-3) O CL. 4.03 NS e 10 V 3 000 CA% "se S414o.. 5) FREQUENCY RESPONS& CAI' •

F1;CO.00UG. D.

100.0 —.3 i I° 0 •-.4 150.0 —.7 300.0

Selenium Diodes encapsulated INTERNATIONAL TELEPHONE AND

wee, ok,-tlit, -W ADC CATALOG ! TELEGRAPH CORP., Clifton, N. J., has improved the design of its type AUDIO DEVELOPMENT COMPANY K1615 center-tap and K1616 dou- 2838-13th Avenue South • Minneapolis 7, Minnesota bler line of "Federal" encapsulated D TRANSFORMERS • REACTORS • FILTERS • JACKS & PLUGS • JACK PANELS selenium diodes. The components, retaining the same type numbers,

108 CIRCLE 87 READERS SERVICE CARD February 13, 1959 — ELECTRONICS Only Bruning's Wee Years-Ahead eepreer,e7,5 are used in horizontal phase de- Offers So Many Operator Conveniences! tector circuits of tv receivers. The improvements, which include use of a new Bakelite case and a new filler, result in components with distinct advantages over a 6AL5 vacuum tube. These advantages include operation at ambient temperatures up to 85 C, rugged mechanical construction assuring long life with resistance to shock, vibration, humidity and low shunt capacitance. Circle 226 on Reader Service Card.

Analog Computer desktop size

DONNER SCIENTIFIC CO., Concord, Calif. Model 3400 analog computer performs the functions of general purpose analog equipment with an exceptional combination of versatility and economy. In design, analysis, or control problems, it affords an accurate, time-saving model of an arbitrary physical system. Easily measured varying voltages represent the physical tooklAlo Heel variables of the problems. Meas- urement of the voltage yields complete information on the system. But the Paper Stays in Place! Parameters can be altered with No hands need hold paper on height adjustment, and a split. the twist of a dial. Circle 227 on the feedboard of Bruning's new shade lamp control that enables Reader Service Card. Copyflex 675 reproduction ma- simultaneous insertion of differ- chine. A unique system of vacuum ent materials. For added conven- ports keeps material in position ience, there's a handy storage until the operator is ready to feed drawer and swing-out ash tray. it into the machine. Add to these operator conven- This is just one of many new, iences the 675's 46 -inch printing advanced operating conveniences width, a mechanical speed of up to that include an exclusive four- 75 f.p.m., and a fast-printing 7,500 way tracing tray that adjusts to watt lamp variable to 5,000 watts. stack or to permit fast removal All this, plus many other advance- of tracings ...a feed band system ments, puts the "675" years-ahead that eliminates curling and wrin- of any other reproduction machine Silicon Rectifiers kling of tracings ...enclosed, easy- on the market. It's the modern to-load feed rods for roll stock... whiteprinter that gives your oper- two new types an electrically controlled machine ators MORE to do MORE for you. RAYTHEON MFG. CO., 55 Chapel St., Newton, 58, Mass., announces the addition of types 1N1763 and 1N1764 to its line of silicon recti- Charles Bruning Company, Inc., Dept. 2-00 fiers. These new types of the wire- 1800 Central Road, Mount Prospect, III. Offices in Principal U.S. Cities in construction are small in size, Diazo Reproduction at Its Best In Canada: 105 Church St., Toronto 1, Ont. Please send me my free booklet on the new suitable for high temperatures and Copyflex Model 675. usable in a variety of equipments where previous silicon rectifiers Nome Title The Bruning Man is your have been too expensive. The expert on Diazo reproduction. Company He's backed by acompany with 1N1763 has a piv rating of 400 y over 60 years' experience as Address and a d-c load current rating of researcher, manufacturer, and supplier. He's located in prin- City County 500 ma at 25 C. Ratings for 1N1764 cipal U. S. cities.

CIRCLE 88 READERS SERVICE CARD ELECTRONICS — February 13, 1959 109 are identical except for a 500 volt peak inverse. Circle 228 on Reader Service Card.

Silicon Rectifiers encapsulated

CONTROL 'CIRCUITS INC., 5 Barton Hill, East Hampton, Conn. A new line of encapsulated silicon recti-

'Trademark fiers includes piv values from 350 to 3,200, and current ratings from 150 ma to 1 ampere. Ambient reliable ...long-lived ratings are up to 140 C. Stock items include direct-replacement types for 6X4, 5Y3, and other vac- ... rechargeable! uum tubes. Printed circuit and under-chassis types are also available in full-wave, full-wave bridge, You can read a watch in the dark with any and half-wave versions. Circle 229 flashlight. The difference in the one the night nurse on Reader Service Card. is using is that it will probably last alifetime. That's because it's powered by a sealed nickel cadmium button cell battery that's recharged simply by plugging it into an ordinary wall socket for a few hours. Result: A dependable flashlight that can't corrode and never needs battery replacement.

How Can You Use These Versatile Batteries? The rechargeable Life Lite is only one of many interesting ways in which imaginative engineers are employing these Gulton VO batteries. Other applications: transistorized radios, guidance canes, missiles, photoflash power packs—wherever small size, large capacity, light weight, long life, no maintenance, complete reliability, and easy recharging are desired.

Most Complete Line Available "VO" cells are available in capacities of 100, 180, 250, 500 and 1750 mah; have a nominal 1.2 voltage; can be packaged in any combination to meet your voltage specs. Patented sintered plate construction provides exceptional cycling characteristics; highest capacity per unit size. Like more information? Write us for Bulletin No. VO -110. Induction Heater floating zone type

LEPEL H IGH FREQUENCY LABORA- ALKALINE BATTERY DIVISION TORIES, INC., 55th & 37th Ave., Gulton Industries, Inc. Woodside 77, N. Y., has introduced its new floating zone fixture for Metuchen, New Jersey the production of ultra-high purity

110 CIRCLE 89 READERS SERVICE CARD February 13, 1959 — ELECTRONICS metals and semiconductor materials. Purification or crystal Type FC-4 4-pole growing is achieved by traversing double-throw. a narrow molten zone along the length of the process bar while it is being supported vertically in vacuum or inert gas. Designed primarily for production purposes, the model HCP also provides great flexibility for laboratory studies. Circle 230 on Reader Service Card.

Type FC-6 6-pole double-throw.

These Improvkd MIS SILE RELAYS withstand 3ÓG vibration at 2,000 cycles Logical Packages low cost ... up to 60G shock without contact opening PACKARD-BELL ELECTRONICS CORP., 12333 W. Olympic Blvd., Los An- ... and 2,000 ft.— lbs. shock without geles 64, Calif. A complete set of contact transfer solid state digital logical packages can be combined to build registers, counters and other data handling equipment, including computers. Backed by more than ten years of intensive devel- The packages include flip-flops, in- opment and refinement, these rugged, precision- verters, gates, drivers, and clock built Struthers-Dunn FC relays have the high re- generators. These low-cost, plug- liability required for missile uses. The outstanding in modules are easily replaceable characteristics indicated above typify perform- and can be built into systems of ance that meets or exceeds the operational and any size. High reliability is environmental requirements of MIL-R-5757C achieved through the elimination and MIL-R-25018. Thanks to simplified design, of both eyelets and printed circuit S-D FC Relays, are priced materially lower than connectors. Circle 231 on Reader other types frequently used to meet these exacting Service Card. specifications. MAKERS OF THE WORLD'S LARGEST ASSORTMENT OF RELAY TYPES NEW BULLETIN AVAILABLE... giving full details and electrical and mechan- PIR*eer..C.>. e ical specifications. Ask for FC Relay Bulletin.

srirmyrmErts -DUNN, Trio. Metal Film Resistor Pitman, N. J. low noise

RESISTANCE PRODUCTS CO., 914 S.

13th St., Harrisburg, l'a., an- Sales Engineering Offices in: Atlanta •Boston •Buffalo •Chicago •Cincinnati Cleveland •Dallas •Dayton •Detroit •Kansas City •Los Angeles •Montreal •New nounces a new precision low noise Orleans •New York •Pittsburgh •St. Louis •San Francisco •Seattle •Toronto

ELECTRONICS — February 13, 1959 CIRCLE 90 READERS SERVICE CARD 111 metal film resistor with a temperature coefficient of -±50 ppm per deg C over a temperature range from —65 C to +165 C independent of resistance value. The precision assembly is enclosed in a specially designed hermetically sealed plastic casing to provide utmost protection for the precision resistor element. Circle 232 on Reader Service Card.

TOROIDAL WINDER TW 300 r l

faster production at lower cost speeds up to 2000 turns per minute Proximity Pickup 4-digit, 2- or 7-position predetermined miniature size ‘. turns counting ELECTRO PRODUCTS LABORATORIES, 4500 N. Ravenswood Ave., Chicago 40, Ill., has announced a new miniature proximity pickup, model The entirely NEW electronic 4912-AN. The sensing face is gin. system of the 1W 300 pro- in diameter. Overall length is 2À vides unmatched features in a in. Mounting thread is 7/16-20. toroidal winder . . . prox- This probe-type pickup is a very imity pick-up for use with any small sensing unit for proximity size wire without physical con- control systems. The pickup can tact .. . 100% accurate turns be used with Electro proximity counting .. . controlled slow- start, slow-stop driving motor control units for detecting sta- .automatic segmental wind- tionary metal objects, as well as ing with perfect repeatability moving metal pieces passing the . . .progressive winding of pickup at a rate up to 60,000 per segments or continuous coils minute. Operating clearances up in either direction. to I in. can be achieved for metal pieces over gin. in diameter. Circle 233 on Reader Service Card. The TW 300, designed for easy servicing and maintenance, cuts production time and operator fatigue to the bone. Flexi• bility in production of new coil types with superior electrical V-R Power Supply characteristics is unlimited because of the new control system transistorized with automatic winding features. This machine is asignificant advance toward complete automation of toroidal winding. KEPCO LABORATORIES, INC., 131-38 Sanford Ave., Flushing 55, N. Y. Model SC-36-2 delivers 0 to 36 v, 0to 2amperes. Regulation for line You get the BEST from BOESCH or load is less than 0.1 percent or 0.003 v, whichever is greater. Rip- ple is less than 1 mv rms. Recov- BOESCH MANUFACTURING ery time is less than 50 left. Sta- COMPANY, INCORPORATED bility for eight hours is less than 0.1 percent or 0.003 IT, whichever PeOESCI-1DANBURY, CONNECTICUT is greater. Operating ambient temperature is 50 C maximum. Tem- perature coefficient is less than

11 2 CIRCLE 91 READERS SERVICE CARD February 13, 1959— ELECTRONICS SPECTROL PRECISION POTENTIOMETERS 0.05 percent per deg C. Output impedance is less than 0.02 ohm. Circle 234 on Reader Service Card. How Spectrol uses an IBM 610 to design better NON-LINEAR POTS

Pulse Generator versatile unit

AMERICAN ELECTRONIC LABORA- TORIES, INC., 121 N. 7th St., Phila- delphia 6, Pa. Pulses, paired- pulses, and trains of pulses are standard outputs for this new instrument. The internal synchronization covers the range of 0.5 cps to 250 kc. External synchro- Buying non-linear potentiometers is usually a big headache for the nization runs from 0 to 250 kc. engineer interested in quick delivery and accurate performance. Pulse widths from 1 itsec to 1.0 First, you must provide the pot maker with detailed design requirements. sec are generated with amplitudes Then wait until the design has gone through the manufacturer's engi- of 35 y into 50 ohms. Unit has a neering department... almost always amatter of weeks. Even then, the built-in attenuator variable from cut and try engineering approach ordinarily used often yields unsatis- 0to 70 db in 1 db steps. Pulse out- factory results. put is positive or negative. Circle To solve this problem, Spectrol recently installed an IBM 610 Com- 235 on Reader Service Card. puter. Spectrol is the only precision potentiometer manufacturer to adapt IBM computer techniques within its own facilities to accurately compute non-linear functions. Using the computer, Spectrol makes complex non- linear precision potentiometers in record time, both single and multi-turn.

How it works. Design information in the form of X and Y coordi- nates or mathematical equations describing the particular parameters of a given non-linear function is entered in the computer. Previously programmed general equations automatically compute from these data points manufacturing directions in terms of winding equipment settings, cam angles and radii. Using ahigh speed electric typewriter as areadout, the directions are automatically printed on a form which is sent to production. Simultaneously, a punched tape is made to store information for Oscillographs repeat requirements. miniature units How the user benefits. Because Spectrol's technique takes the guesswork out of non-linear potentiometer calculation, minimizes time APPLIED SCIENCE CORP. OF PRINCE- consuming hand calculations, and provides error free results, the cus- TON, P. O. Box 44, Princeton, N. J. tomer receives a superior product sooner. In quoting on particularly A new line of miniature oscillo- complex requirements, quote time is reduced from weeks to days. In graphic recorders with multichan- emergencies, engineering and sales data can be prepared in afew hours. nel data handling capacity has Your nearby Spectrol representative will be happy to provide more infor- been announced. The compact and mation about Spectrol linear and non-linear precision potentiometers or you rugged oscillographs can handle may write direct. A free Spectrol potentiometer specifications book is yours simultaneously 6 continuous ana- for the asking. Please address Dept. 182 log data channels plus 3 on-off channels for timing and event ELECTRONICS markers with an accuracy of better than 1 percent. The units are CORPORATION ideal for recording flight and per- 2 1704 S. DEL MAR AVE., SAN GABRIEL, CALIFORNIA

ELECTRONICS—February 13, 1959 CIRCLE 92 READERS SERVICE CARD 113 formance parameters in aircraft and missile test programs. Circle 236 on Reader Service Card. ELECTRONIC COUNTERS

Closed-Circuit Tv for remote viewing

INDUSTRIAL PRODUCTS DIV., Inter- national Tel. & Tel. Corp., 15191 Bledsoe St., San Fernando, Calif. A versatile and complete new line of c-c tv for military, industry, business and education makes possible remote viewing of an action or NEW — process otherwise inaccessible or Advanced hazardous. The basic system consists of new and improved vidicon Circuitry camera, monitor, and control unit. Camera features an entirely electronic light compensator, which NEW — instantly and automatically ad- Mechanical justs to compensate for light Design. changes over a practical range eight times as great as normally covered by lens stops. Circle 237 N EW HIGHS in STABILITY and ACCURACY on Reader Service Card. Yet at New LOWS in COST!

MODEL 13-20 $995 Transceiver to (fps to 1.1 MC transistorized RIXON ELECTRONICS, INC., 2414 Reedie Drive, Silver Spring, Md. A transistorized transceiver recently BOTH MODELS available with optional Transistorized Oscillator: developed is capable of transmitting digital data over voice com- Stability 5 parts in 10' per week; and 5 parts in 10' per month munications circuits at speeds up thereafter; at nominal additional cost. to 2,500 baud (bits/sec). Called the Sebit-25 (short for Serial Binary Information Transmis- NORTHEASTERN ENGINEERING, INC. sion), the unit is a simple a-m system that uses vestigial side- MANCHESTER, N. H. • 25 So. Bedford St. band transmission and synchro- P. O. Box 150 • NAtional 2-6485 nous operation. It includes time delay and amplitude distortion

114 CIRCLE 93 READERS SERVICE CARD February 13, 1959 — ELECTRONICS compensating circuits. Field tests show that the unit can be operated successfully over wi,re lines several thousand miles long. Circle 238 on Reader Service Card.

Digital Voltmeter all solid-state

BECKMAN SYSTEMS DIVISION, 325 N. Muller Ave., Anaheim, Calif. (CYRas Model 81 digital voltmeter is an all solid-state device using a unique comparison technique for Sc ENT:AR7UM* operation. The unknown input voltage is first compared to the signal from a precision digital to analog converter. The digital to analog converter output is varied until equal to the input and the converter's contents are then presented in digital form. This entire operation, including automatic range and polarity determination, is accomplished 15 times per sec. Circle 239 on Reader Service Card. The Westinghouse symbol represents a select circle of scientists and engineers dedicated to the betterment of man through the advancement of science. At Westinghouse-Baltimore, your engineering skill and creative abilities would be developed to their fullest capacity to further the attainment of this ideal. Write for details on the Westinghouse-Baltimore operation and the opportunities it offers you. Rectangular CRT ultra-short

W ATERMAN PRODUCTS Co., 2445 Em- CAREER OPPORTUNITIES EXIST IN THE FIELDS OF: erald St., Philadelphia, Pa., announces a new ultra-short high TO APPLY: ADVANCED FILTER DESIGN performance rectangular crt. This Please send aresume COMMUNICATION SYSTEMS 13.-in. by 3-in. Rayonic type 3YP of your education ELECTRONICS INSTRUCTOR tube can be operated at anode and experience to Dr. J. A. Medwin, ENGINEERING WRITING potentials as low as 500 y with Dept. 878, INSULATION vertical and horizontal sensitivi- Westinghouse MICROWAVE COMPONENTS ties of 26 and 40 y d-c in. respec- Electric Corporation, P. 0. Box 746, SOLID STATE SYSTEMS tively. Despite its short length of Baltimore 3, Maryland. TEST ENGINEERING 7 in. overall, it has a high brightness and can operate with anode potentials as high as 2,750 v. Tube is electrostatically focused and deflected. Circle 240 on Reader Service Card. Westinghouse

BALTIMORE A-M/F-M Tuner low noise level

THE ERIE RESISTOR CORP., Erie, Pa., has introduced a new a-m/f-m *The Circle of the Sciences tuner, model EM-085-ER, featur-

ELECTRONICS —February 13, 1959 115 THOR TITAN ATLAS BONIARC POLARIS TALOS ing an etched wiring board and Erie PAC's. It includes two i-f stages, a limiter stage, and a Foster-Seeley discriminator circuit. Company says that the 300 ohm balanced input, with tri -filar matching coil, eliminates the usual dual input stage, and that low noise level and strong afc control voltage, for positive afc action, and high level of audio output signal, are the outstanding characteristics. Circle 241 on Reader Service Card.

Auxiliary Memory saves computer time

TELEMETER M AGNETICS, INC., 2245 Pontius Ave., Los Angeles 64, Calif. A new low-priced core storage buffer is announced. The unit permits full utilization of valuable THERE IS A REASON...why CHRIST/if computer time in data processing involving slower functioning ex- was selected as the principal source of ternal equipment. Operating at a rate of 100,000 characters per sec, D-C Power Supplies for all the above the new buffer accepts any size block of data up to 720 characters projects...RELIABILITY of 6, 7 or 8 binary bits each. Circle 242 on Reader Service Card.

CHRISTIE'S rigid Quality Control is approved by the A. E.C. and leading Aircraft and Missile Manufacturers. Transistor alloy-junction

CHRISTIE ELECTRIC CORP. RADIO CORP. OF AMERICA, Somer- 3410 W. 67th St., Los Angeles 43, Calif., Dept. EL ville, N. J. The 2N647 is a new alloy-junction transistor of the Precisely regulated Power Supplies of permanent stability. Ratings up to 1500 germanium npn type intended es- amperes. Bulletin on Standard Militarized units available on request. pecially for use along with its pnp counterpart, the 2N217, in class B complementary-symmetry power output stages of trans- formerless, battery-operated portable radio receivers, phonographs, and audio amplifiers. It is particularly useful in equipment in which compactness, good frequency response, and relatively

116 CIRCLE 95 READERS SERVICE CARD February 13, 7959 — ELECTRONICS high power output at low cost are 1 ro important design considerations. Circle 243 on Reader Service Card.

MODEL 942 Gyroscope Recommended spring driven by Leading Magnet W ALTHAM PRECISION INSTRUMENT Co., Waltham, Mass., announces a Makers new spring driven gyro for use in short range missiles and target drones. This 2 deg of freedom gyroscope supplies a potentiometer signal to control roll with ±50- deg of freedom. Its rotor is For saturating Alnico magnets weighing up to 34 lbs. and high flux ceramic magnets of any shape or pole energized by a spring, bringing the configuration. Operates on condenser discharge prin. rotor up to peak speed in a frac- ciple from regular 115-volt, 60-cycle line. tion of a second. Simplicity of de- Charging outputs from 100,000 to 200,000 ampere- sign makes the instrument well turns through plug-in transformers, up to 3600 watt- seconds using wire-wound fixtures. Adapters for suited to high-volume, low-cost multi-pole rotors, rod, bar, ring and various other applications. Circle 244 on Reader shapes available. Designed for continuous produc- Service Card. tion use with low power consumption. Price of basic unit is less than S2100.

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A medium power Magnet Charger capable of developing peak magnetizing force of 40,000 ampere-turns. Designed for production, research MODEL 1500 and instrument repair work. The Model 1500 easily saturates the new high coercive materials such as Cobalt Platinum and Barium Ferrite. Port- able table model operates on 115-volt, 60-cycle line; size 11" wide x 15" high x 20" deep; weight 125 lbs. Price $945.

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A low cost, condenser discharge unit employing novel, plug-in wire-wound type charging fixtures, the Model 1221 is designed for the user of small magnets. Its 10,000 ampere-turn Inspection Table output will saturate about 2" of Alnico V. Charging cycle rate is approximately 3 sec- short model onds, continuous duty, operates from 115-volt MODEL 1221 line. Price S180. G. F. GOODMAN & SON, 401 Rich- mond St., Philadelphia 25, Pa., has Performance of all models is rigidly guaran. teed. Prices are net f.o.b. Boonton, N.J. and introduced a short model version subject to change without notice. of its inspection table. It is claimed to provide a high quality unit for small parts inspection, at a very low price. Seating two operators, 13years' magnet chaorugr; it occupies only 6 ft by 2 ft of floor ing experience is yours

space. The work belt, without jarg asking—send tOT data sh ee ts center drop, offers variable speeds from 10 to 20 ft per min. The belt is 15 in. wide, with working surface 36 in. long. A stainless steel

CIRCLE 96 READERS SERVICE CARD ELECTRONICS—February 13, 1959 117 INICAD battery storage hopper (2 cu ft) supplies ...PACKAGEDrndik PAYLOAD of a vibratory feed mechanism for even distribution across the belt. RELIABLE POWER at -40° Circle 245 on Reader Service Card. for Standard Manufacturing's MJ-1

Capable of completely dependable operation at --40°F.— an exceptionally rigorous performance demand met by Standard's MJ-1 and its components—of which the NICAD nickel cadmium battery is avital one. Standard uses a 6 volt NICAD sintered plate battery as the engine starting power source on these bomb lifts ... and avoids engine starting failure which would detract from the service and dependability of its products. Tiny Motor squib-actuated

ATLAS POWDER CO., Wilmington 99, Del., has developed a powerful miniature, squib-actuated dimple motor, which provides positive displacement for the performance of mechanical work. It should be of special interest to designers of NICAD batteries will not freeze in any state of missiles, weapons and weapons charge, and perform at peak efficiency in tempera- systems. The motor is 0.300-in, in tures below the —40° requirement here, and as diameter and 1-in. long. Actuated high as 140°. by as little as 7,500 ergs, the mo- Also produced in smaller sizes that make sense tor is capable of providing 8 lb of to designers, NICAD sintered plate batteries pos- thrust over a 0.1-in, minimum sess power output and other advantages that make stroke within an elapsed time of 1 them especially adaptable to the confined systems millisec. Circle 246 on Reader of missiles, aircraft, telemetering instruments, and Service Card. similar equipment.

-7.1ffligeWieneu--

PDM NICAD offers cycle life which far exceeds that Multicoder of any other type battery ... peak operational effi- highly reliable ciency under severe conditions ...low internal re- GENERAL DEVICES, INC., P.O. Box sistance that creates high discharge rates ...capacity 253, Princeton, N. J. The ML range from 1/2 to over 150 ampere hours. series low level pulse duration For more information, request Bulletin 501A modulation multicoders are avail- from NICAD Division, Gould-National Batteries, able in all the standard IRIG sam- Inc., Easthampton, Mass. pling rates and channel configurations. Maximum input sensitivity •14717Eq- rl is from 0 to 10 mv for full scale, •111AI with amplifier gain adjustable to • 111111a- 9111M10- %et- "r".'•-• provide any range to 100 mv for NICKEL CADMIUM full scale. The multicoder con- ALKALINE sists of an electromechanical commutator, d-c amplifier, pam to pdm NICAD STORAGE BATTERIES converter and power supply. Cir- TRADEMARK cle 247 on Reader Service Card.

118 CIRCLE 97 READERS SERVICE CARD February 73, 1959 — ELECTRONICS .11,77 7ifj SURPASSES the tough requirements of MILI-11-631C

Pulse Generator fast rise time

RESE ENGINEERING, INC., 731 Arch St., Philadelphia 6, Pa. Model 1051 millimicrosecond pulse generator produces high amplitude, ultra short duration current pulses for development and design applications in high speed logic and memory problems, solid state research, and high speed transistor switching operation. Featuring jitter-free pulses with rise times as fast as 5 millimicroseconds, the 1051 generates positive or negative pulses at ground level with durations of 10, 20, 50 and 100 light feet. Circle 248 on Reader Service Card. .s. ._SLEEVING ... 7" i PERFORMANCE PROPERTY REQUIREMENTS HI-HEAT 105A MIL-I-6 31C AND 105 Developed and constantly Oil No oil penetra- No penetration. tested to surpass all require- resistance. tion. 10% max. No change. ments of MIL-I-631C diam. increase. (Grade c) Resinite Hi-Heat High 200 hrs. @ Maintains flexi- 105A offers an extra margin temperature 100°C. bility after 1000 of safety. Particularly suited resistance. hrs. @ 125°C. for electrical applications Dielectric 400 to 800 1000 volts/mil Ten-Turn Pot encountering high heat, oil strength. volts/ mil min. avg. and pitch, it is also fungus, for range of miniature unit wall thicknesses. flame, corrosion and acid 2700 psi min. VOAK ENGINEERING CO., 129 East A resistant. Eleven colors, Tensile 1800 psi min. strength. St., Upland, Calif. New miniature including transparent. Full Softening 80° Cmin. 94°C min. ten-turn potentiometer (voltage size range, AWG 24 through temp. dividing resistor) features a diam- 2/12 "I.D. Cold Below —10°C. —18°C. eter of only '1g in., a length of 11 in., For LOW temperature brittleness. and a shaft diameter of 1in. It can MIL-I-631C (Grades a& b) Flame 15 sec. max. 10 sec. max. be provided with either a standard sleeving, specify Resinite resistance. bushing mount, or servo mount, EP-69A. with or without ball bearings. It Write for samples and performance data. contains the maximum possible length of resistance element, providing higher than usual resolu- tions for a unit of this size, and with linearity as close as ±0.05 percent. Any resistance in the range from 50 ohms to 200,000 esinite ohms, and any number of turns THE 'Borden CHEMICAL COMPANY Resinite Department from three to ten, may be supplied. Plants: Santa Barbara, Calif. • No. Andover, Mass.

Circle 249 on Reader Service Card. SPECIALISTS IN VINYL SLEEVING ANO TUBING FOR THE AIRCRAFT, ELECTRONICS, ELECTRICAL AND PHARMACEUTICAL FIELDS

ELECTRONICS — February 13, 1959 CIRCLE 98 READERS SERVICE CARD 119 Literature of

MATERIALS

Molded Fiber Glass. Molded Fiber Glass Companies, 4826 Bene- fit Ave., Ashtabula, Ohio. A 32- page brochure describes molded fiber glass and the methods used to produce it. Circle 275 on Reader Service Card. en when only the best is good ough COMPONENTS Germanium Diodes. Ohmite Mfg. Co., 3683 Howard St., Skokie, Ill. Bulletin 158 describes a line of gold-bonded germanium diodes. It lists many types for general purpose and computer use, where from one to four operating characteristics are specified. Circle 276 on Reader Service Card.

Magnetic Amplifier Design. Ac- romag, Inc., 22519 Telegraph Rd., Detroit 41, Mich. Engineering bulletin No. 403-A has 45 sche- CIRCLE 99 READERS SERVICE CARD matic diagrams and graphs describing magnetic amplifier design and application techniques. Unlimited Phasing with Extreme Compactness Circle 277 on Reader Service Card. Toggle Switches. Sargent Elec- tric Corp., 630 Merrick Road, Lyn- RVG brook, N. Y. A new, 8 page, com- Precision prehensive catalog (S106) lists 200 Miniatures models of toggle and trigger switches. Circle 278 on Reader for superior Service Card. performance

EQUIPMENT

Linearity determined dynamically on each Environmental Test Chambers. unit on NEW Gamewell *LARTester RVG-10 Conrad, Inc., Holland, Mich. A (*Linearity — Angle — Resolution — Tap location) six-page folder illustrates and This special Gamewell Phasing Clamp design has two important describes temperature, altitude extras: Extreme compactness and High Temperature compatibility. Check these features... and humidity test chambers with • Only >4" depth per section •Continuous service up to 150C avail- capacities up to 1,200 cu ft and able •Stainless steel clamps give unlimited phasing • Large number of taps, limited only by physical spacing •Exclusive Gamewell high larger. Circle 279 on Reader Serv- unit pressure contacts give permanent, low resistance tap connection, ice Card. no linearity distortion • Will withstand High "G" and operation under severe vibration • Three styles of mounting: Servo. Bushing and 3-hole • Available in ball or sleeve bearings, shafts as specified High Speed Printer System. Bur- • Comes in models RL-270A-1 15 8. ; RL-270A-2 and RL-270A-3. More information, prices and delivery available from Gamewell roughs Corp., 460 Sierra Madre representatives or write: THE OAMIEWELL COMPANY, Newton Upper Falls 64, Mae& Villa, Pasadena, Calif., offers a RVG• 17XS 1'A6" Sine•Cos. 4-page brochure describing the 220 high speed printer system, SPECIAL! PRECISION which prints out copy direct from Send for New Gamewell INELL ® POTENTIOMETERS Catalog on complete line. the computer or from magnetic tape at up to 1,500 lines per

120 CIRCLE 150 READERS SERVICE CARD February 13, 1959 — ELECTRONICS accuracy...versatility...reliability the Week SOLID STATE ELECTRONIC RELAY No Moving Parts minute. Circle 280 on Reader Snap Action Characteristics Service Card. Isolated Switching Circuit S. P. S. T. 10 Mils to 10 Amps. D. P. S. T. 10 Mils to /12 Amp. Electronic Instrumentation. Kay 18 to 30 Volts D. C. Operating AC or DC Switching, at Rated Voltage Electric Co., Maple Ave., Pine Pick Up Time 5 eisec — Brook, N. J. A recent mailing piece Drop Out 30 psec describes the Megalator, catalog —55° F to +160° F or —55° C to +125° C No. 3000, a d-c to 1,000 mc ampli- ELECTRONIC TIME DELAY RELAYS tude modulator; and the Van-Vox, 50 Milliseconds to 2 minute Delay on Make catalog No. 615A, a speech time or Break compressor and expander. Circle Single-Pole, Double-Throw to 5 Pole Double- 281 on Reader Service Card. Throw Contacts Rated 1to 10 Amps. 28 Volts D. C. Available with External Adjustment Phase Meter. Control Electron- —55° C to +125° C ics Co., Inc., 10 Stepar Place, SOLID STATE ELECTRONIC FLASHERS Huntington Station, L. I., N. Y., recently issued a data sheet on No moving parts 50 to 5000 Flashes per minute their direct reading phase angle On and Off Differential 10% meter and monitor. Circle 282 on Single-Pole, Double-Throw Switching up to 5 Amps. 30 Volts D. C. Reader Service Card. Low Radio Noise —65° F to -1-160° F Data Loggers. Gilmore Indus- tries, Inc., 13013 Woodland Ave., SWITCH-LIGHT COMBINATIONS Cleveland 20, Ohio, has published Push On Push Off or Momentary Snap Action a four-page bulletin on data log- Double-Pole, Double-Throw, Double Break gers for weight, strain, force, flow, Contacts Independent Lamp Circuit 6or 28 Volt D. C. pressure and temperature. Circle 5 Amps. Inductive Contacts 28 Volts D. C. 283 on Reader Service Card. Operating Pressure — 3lb. ± 1lb. Maximum Plunger Travel, .180 Case Diameter, MI" Power Supplies. Lambda Elec- Variety of Lens Available tronics Corp., 11-11 131 St., College Point 56, N. Y. A new 36-page KEYBOARD SWITCH 6 POLE catalog contains information and Push-On Push-Off or Momentary Snap specifications on the company's Action 6 Independent Poles, available in any full line of transistor-regulated combination of normally open or and tube-regulated power sup- normally closed contacts Contacts Rated % Ampere Resistive. plies. Circle 284 on Reader Serv- 28 Volts D. C. ice Card. Operating Pressure — 1lb. (Approx.) Maximum Plunger Travel, .187 Case Diameter, 3/4" Magnetic Tape Tester. General Variety of Caps Available Kinetics Inc., 555 23rd St., South, Arlington 2, Va. A bulletin de- MINIATURE POWER RESISTOR scribing a new digital computer Metal Case Construction accessory, the model U-1 auto- Steatite Wire Insulation Screw or Solder Terminals matic magnetic tape tester, is 3/4"Diameter, 3 inches long available. Circle 285 on Reader à 100 Watts — Low Ohms at 28 Volts D. C. High-Shock and High-Temperature Service Card. Approved

The components shown here represent some of the units which were FACILITIES designed and engineered and are being produced at Pendar. It is entirely possible that many of these units could fit your system without modification, however, any requirement you may have can be engineered and pro- Missile Systems. Ford Instru- duced in accordance with your specifications, using the latest techniques. ment Co., Division of Sperry Rand For Complete Information Write Corp., 31-10 Thomson Ave., Long Pendar, Inc. Dept. El, P.O. Box 3355 Island City 1, N. Y. An 8-page 2- Van Nuys, California color brochure covers the firm's abilities and facilities in missile system development and precision endar,ine. production. Circle 286 on Reader LOS ANGELES, CALIFORNIA Service Card. SALES ENGINEERING REPRESENTATIVES IN PRINCIPAL CITIES

ELECTRONICS—February 73, 1959 CIRCLE 151 READERS SERVICE CARD 121 PLANTS AND PEOPLE

Electronic Products. Among major radar and systems contracts held by the company are those for the ballistic missile early warning system (BMEWS), for which RCA is the prime system contractor to the U. S. Air Force, and the electronic check-out and launching system for the Atlas missile, under subcontract to Convair.

L.I. Firm Expands

M ICROTRAN CO., INC., Valley Stream, N. Y., has completed a 5,000-sq ft addition to its present transformer manufacturing facilities. Incor- porated in this 50-percent addition to plant facilities also will be dust and humidity control to improve In Puerto Rico: 68 U.S. Firms transformer reliability and mini- mize rejects. Two West Coast firms and one about to be founded—all active in space age work—are setting up Puerto Rican plants. This brings to 68 the number of U. S. electronics and related companies operating in P. R., the island government reports. The Commonwealth's Economic Development Administration identifies the firms recently signed up as Endevco Corp., Pasadena, and two Los Angeles companies, Statham Instruments, and Luce International, a new company to be founded in Puerto Rico by inventor Milton A. Luce. Reasons for the missile program companies' expansion to Puerto Rico include: (1) Freedom from Federal taxes and exemption from local taxes for ten years, which along with lower wages make for overall lower-than- stateside operating costs; (2) rising productivity; (3) proven high prof- its, in some cases as high as 60 cents on the sales dollar; and (4) despite the long distances involved, surprisingly low transportation costs. H. Dudley Wright, president of Endevco Corp., (shown at right with Peter Martinez, left, western industrial representative, Economic Devel- opment Administration of Puerto Rico, and Wilson Bradley, Jr., Endevco general manager) says one reason he picked Puerto Rico was .. . "our Degen Takes close association with military markets requires plant decentralization to assure continued product availability." New Post

The firm will produce accelerometers at Endevco Puerto Rico, Inc., in JOSEPH F. DEGEN is the newly ap- the town of Guaynabo. pointed vice president—manufac- Statham Instruments, Inc., will manufacture scientific instruments and turing of Daystrom-Weston Divi- transducers. This is the second plant in Puerto Rico for Statham. sions, Daystrom, Inc. He was vice Luce International will produce its recently-developed self-energizing president of manufacturing for valve for guided missiles and aircraft. Company expects to start opera- Weston Instruments Division. tions in the town of Fajardo in March. Prior to joining Daystrom in 1957, Degen was superintendent of Fernando Valley, has just begun. the Poughkeepsie, N. Y., plant of RCA To Set Up Partial occupancy is scheduled for IBM. Missile Center late summer, with completion of the initial phase of construction due RADIO CORP. OF AMERICA will estab- by the end of the year. lish a major missile and radar cen- The decision to locate a major Mieher to Head ter at Van Nuys, Calif. plant at Van Nuys stems from the Construction of the new facility, company's growing business in the Big Sperry Job acluster of engineering, production weapons system and radar fields, APPOINTMENT of Walter D. Mieher and administrative buildings lo- according to A. L. Malcarney, exec- as engineering manager of Sperry cated on a 50-acre tract in the San utive vice president, RCA Defense Gyroscope Company's counter meas-

122 February 13, 1959 — ELECTRONICS ... Flight Controls

Flight Controls offers one of the most challenging areas of work at Lockheed's Missiles and Space Division. From concept to operation, the Division is capable of performing each step in EXPANDING research, development, engineering and manufacture of complex systems. Rapid progress is being made in this field to THE FRONTIERS advance the state of the art in important missile and spacecraft projects under development at Lockheed. OF SPACE Flight controls programs include: analysis of flight data and sub-systems performance, design and packaging of TECHNOLOGY flight control components, development of transistorized circuits, operation of specialized flight control test equipment, Pre-flight check-out on final and fabrication of flight control assembly on X-7 missile. The X-7 holds free-world's speed prototypes. Other work deals with the and altitude records for air design, development and testing of rate breathing missiles. and free gyros; accelerometers; programmers; computer assemblies; guidance control systems; circuitry; and hydraulic systems and components. In the flight controls simulation laboratory, mathematical representations of elements in acontrol system are replaced one by one with actual hardware to determine acceptability of specific designs. From these studies. Lockheed obtains information which is used in further refinement and improvement of final control systems designs. Lockheed Missiles and Space Division is weapons systems manager for such major, long-term projects as the Navy Polaris IRBM; Discoverer Satellite; Army Kingfisher; Air Force 0-5 and X-7; and other important research and development programs. Scientists and engineers desiring rewarding work with acompany whose programs reach far into the future are invited to write: Research and Development Staff, Dept. BB-22, 962 W. El Camino Real, Sunnyvale, California, or 7701 Woodley Avenue, Van Nuys, California. For the convenience of those living in East or Midwest, offices are maintained at Suite 745,405 Lexington Avenue, New York 17, N.Y. and at Suite 300, 840 N. Michigan Avenue, Chicago 11, Ill.

Transistorizing missile flight control systems by "The organization that contributed most One of Lockheed's test stands Lockheed scientists has meant significant in the past year to the advancement of with dynamic thrust mount to reductions in weight and space requirements. the art of missiles and astronautics." simulate flight environment.

NATIONAL MISSILE INDUSTRY CONFERENCE AWARD

Lockheed MISSILES AND SPACE DIVISION

SUNNYVALE. PALO ALTO. VAN NUYS. SANTA CRUZ. SANTA MARIA. CALIFORNIA

CAPE CANAVERAL FLORIDA • ALAMOGORDO. NEW MEXICO ures division has been announced recently. He will be in charge of all the company's countermeasures research and engineering activities, including the multimillion-dollar Air Force program now underway to equip B-52 intercontinental bombers with electronic jamming and missile deception capabilities of extremely advanced nature. Mieher has been serving for the past three years as a consultant to the Assistant Secretary of De- fense for Research and Engineer- ing.

SPECIALISTS IN RESEARCH, DESIGN, DEVELOPMENT AND PRODUCTION

CIRCLE 153 READERS SERVICE CARD

YOU CAN SAVE

UP TO SO% ON Fullerton Takes

SMALL PARTS LIKE THESE New Position SERIES 26D by using APPOINTMENT of Richard B. Fuller- 10 AMP. TRADEMARK ton as chief engineer, Systems Di- vision, for Pacific Automation KURNIAN BEAD CHAIN Products, Inc., Glendale, Calif., is announced. Prior to joining the MINIATURE Multi-Swage company, he was associated with POWER RELAY PRODUCTS RCA, Missile and Surface Radar

• FEATURES Every year Bead Chain pro- Department, as systems project en- • e •Clear polystyrene dust-proof enclosure duces billions of tubular metal gineer leader for various missile parta for electronic and me- • • Up to 3 P D T, 10 amp. contacts programs. • chanical applications. Multi- •AC or DC coil, up to 15,000 ohms • Swage eliminates costly turn- • • Life-100,000 operations minimum ing, drilling, stamping and • • Dimensions 13/8"sq. x V4,," high • forming—automatically swages • ,• Octal or 11 pin plug-in from flat stock into strong • STOCKED BY LEADING DISTRIBUTORS precision forms with positive, Dudley Joins • FROM COAST TO COAST tight seams. If you're avolume For Immediate Delivery at Factory Prices user of such parts, in any Lincoln Lab • metal, up to %.". diam. z13e • KURMAN ELECTRIC CO. long, find out how much Multi- EDITOR of Tile Technology Review Division of Norbute Corp. Swage can save you. Send • Quality Relays Since 1928 sketch or standard parts for at the Massachusetts Institute of • 191 NEWEL ST. prompt estimate. Write for Technology since 1945, Beverly • BROOKLYN 22, N. Y. • catalog today. Dudley has joined Lincoln Labora- • Export:135 Liberty St,N.Y. Be • Cable: TRILRUSH THE BEAD CHAIN MANUFACTURING CO. tory as assistant to the director. • 88 Mountain Grove St., Bridgeport Conn. Volta W. Torrey, director of tele- • SEND FOR CATALOG 1>•••••••••••••••••••••• vision at MIT, has been appointed CIRCLE 154 READERS SERVICE CARD CIRCLE 155 READERS SERVICE CARD 124 February 13, 1959 — ELECTRONICS You Get Things Done With to succeed him on the Review. Boardmaster Visual Control Before becoming editor of The are Technology Review 14 years ago, Dudley was associated with the Mc- Graw-Hill Publishing Co. for nine yo years, successively as assistant and associate editor of ELECTRONICS. He was managing editor of Photo Technique, consulting editor for McGraw-Hill technical books on radio communication and was originator of the Radio Communi- \Ç cation Series.

* Gives Graphic Picture of Your Operations— Spotlighted by Color News of Reps * Facts at a glance — Saves Time, Saves using Money, Prevents Errors er Simple to operate — Type or Write on Cards, Premier Instrument Corp., Port Snap in Grooves Chester, N. Y., appoints Floyd * Ideal for Production, Traffic, Inventory, only Scheduling, Sales,, Etc. Fausett & Co. as sales rep in the * Made of Metal. Compact and Attractive. areas of Alabama, Mississippi, Over 300,000 in Use Georgia, North Carolina, South HALF Complete price $4950 including cards Carolina, Tennessee and Virgina FREE1 24-PAGE BOOKLET NO. C-20 with the exception of Fairfax your Without Obligation County; the Shephard-Winters Co. Write for Your Copy Today for southern California. GRAPHIC SYSTEMS Hunter & Salsbury Inc., Hicksville, potential 55 West 42nd Street • New York 36, N. Y. CIRCLE 156 READERS SERVICE CARD N. Y., announce their appointment In your present job? as reps for Electro Development Co., Van Nuys, Calif. They are Because of the diversity and rapidly covering the metropolitan New increasing demands for our products, York-New Jersey territory for you have the challenging opportunity Electro's line of precision molded here at Bendix-Pacific to construc- slip ring and brush block as- tively apply all your talents. semblies and subminiature selector There are important career positions switches. open NOW at all levels in our small, independent engineering groups in The Doyen Co., Livingston, N. J., these fields — announces appointment of Nor- man W. Kathrinus & Co. of St. MISSILE GUIDANCE • TELEMETERING TIC) DICAU Louis, Mo., as its rep in the Mis- AIRBORNE RADAR • MISSILE HY- souri, southern Illinois and Kansas DRAULICS & MARINE HYDRAULICS area on its complete line of rotary SONAR & ANTI-SUBMARINE WARFARE tap switches, precision wire wound resistors, transistorized power sup— Please write W. C. Walker your plies, miniature switches, hermet- qualifications or fill in the TUI8D32,WZ231à ically sealed metal film resistors, coupon and mail it today. attenuators, LC filters, RC and resistive networks and laboratory IDTMICTHOM W. C. Walker, Engineering Employm't Mgr. test equipment. Bendix-Pacific, Bendix Aviation Corp. 11604 Sherman Way, No. Hollywood, Calif. Iam interested in (check onel nemo Richard A. Strassner Co. of Los O Electrical 13 Mechanical Engineering Iam agraduate engineer with Angeles and Redwood City, Calif., degree has been appointed sales rep for I am not a graduate engineer but have the line of special-purpose tubes years experience. manufactured by National Union Name DC.)(n2Pcutaincm Electric Corp., Bloomington, Ill. Address w Rep firm will cover the entire City (boa. .2.1.0.1.00„ states of California, Arizona, Ne- Zone—..—State 313M Uça3 vada and New Mexico. CIRCLE 157 READERS SERVICE CARD

ELECTRONICS — February 13, 1959 125 MEASURE DELAY ACCURATELY COMMENT

Envious Coexistence JITTER Hot idea: you can disrupt the WITH Ill's NEW whole Soviet scientific program. They read ELECTRONICS avidly. They extract from it charts and PULSE nomographs that might be of use to their schools and scientists. Iam inclined to think that their translators may not know always TIMER MODEL PT244 $1 895 0 0 how important technical material WHAT IT IS - may be, and therefore clip nearly HOW IT WORKS everything to avoid criticism of not . . . a paired trigger generator Delay controls position gates which with fixed and delayed pulses. providing their technical staffs select desired pulse from 100kc Combination of counters and digi- with the latest information from tal dial provides direct reading crystal controlled pulse chain to America. delay to 9,999.99 microseconds avoid jitter inherent in delay cir- accurate to better than 0.01 micro- cuits. Phantastron circuit provides Here is how to disrupt the works. second. Note that this instrument vernier control between 10 micro- On the back of nomograph pages, is a full size module of the TLI second pulses. Jitter less than and pages containing circuit dia- Modular Instrumentation System. 0.001 microsecond. grams, publish one-page articles of Incorporates design of Hazel- Full specifications and these three types: tine Electronics Corp. Model application informatipn 1754 Precision Time Measuring available on request in Profiles of middle-class Ameri- Equipment. Bulletin ED-82 cans: assistant engineers, drafts- men, technical interpreters, assist- TELETRONICS LABORATORY, INC. ant professors, even one of your 54 KINKLE STREET staff. Describe his work briefly. WESTBURY, L. I., N. Y. CIRCLE 159 READERS SERVICE CARD Describe his home, the modern ap- pliances in it, his car, his family DE MORNAY-BONARDI • life, his social life, his recreation, trst in a typical evening meal, his reading habits, even his clothing and shoes., ultramicrowave Paint a picture in words so fasci- nating that his Russian equivalent e. equipment will be green-eyed. A man in Amer- ica, doing no more than he is doing in Russia and having all the luxu- A complete line of research instruments covering frequencies up to 90,000 mc ries we take for granted in this proved in laboratories the country over. country. Domestic readers will like this feature, too. I would say of my counterpart, "he's not so hot; I've got more kids and live just as well as he." This series would make DE MORNAY• BONARD I • 780 SOUTH ARRn0 PARK AA PASADENA. CALI FOR N IA CIRCLE 160 READERS SERVICE CARD Russian engineers very unhappy with their lot. As Mikoyan said, "even the poor in this country live surprisingly well." Historical vignettes. It is said to

• • be taught in Russia that many in- .Electrical Coil Windings ventions patented years ago in this For 40 years .. . specializing in all types of coils to country were of Russian origin. customers' specifications. Design or engineering assist- The story of some of these inven- ance available on request. tions, the struggles of putting the basic idea across, and intimate details—with dates and places— would make your Russian readers COTO -COIL CO., INC • wonder about the truth of their SINCE 1917 teaching. 65 Pavilion Avenue Providence 5, Rhode Island Brief summaries of the great patent cases and how the courts

126 CIRCLE 161 READERS SERVICE CARD February 13, 1959 — ELECTRONICS News about RAYTHEON'S SEMICONDUCTOR DIVISION —the place for the man

who is growing faster

than his associates

Here is where transistors were first mass- produced to open up the fast-growing semiconductor industry...where a major "all-out push" is under way ... where 1,008 new people were added in the last half of Bright Field * interference 1958 ... where 220,000 sq. ft. of new modern facilities are being added ... where management says: "Here are the tools you asked for!". .. where men with growth potential play arecognized role.

In the major league now with a broad line, Raytheon's Semiconductor Division will continue to be aleader in the research, engineering and manufacture of semiconductors.

For the man who is growing faster than his present associates and who seeks diversified assignments, there are exciting growth opportunities in:

INTERFERENCE FRINGES are useful in determining slight changes in elevation and measurement of thin coatings such as those that might be laid down by • Device Design and Development vacuum evaporation. The above photomicrographs (112)0 show gallium diffused silicon used in making Raytheon diffused base NPN silicon high frequency transistors. The silicon is at the bottom of each picture. The depth of the • Material Development gallium penetration is .0007". The height of the junction step after etching is .0000088". The bright field picture shows how the junction 'looks normally under a metallurgical microscope. The interference picture shows how this same • Product Design junction looks under an interference microscope. • Product Evaluation II r. • Mechanization STRICTLY IN CONFIDENCE • Automatic Electronic Testing If you would like to explore the growth possibilities for yourself, please send your resume to Mr. Allen • Application Engineering Moorhead, RAYTHEON MANUFACTURING COMPANY, Semiconductor Division, 150 Califor- If you are looking for a place to grow faster, nia Street, Newton 58, Mass. there's plenty of elbow-room for you at I. Raytheon's Semiconductor Division.

"The place for the man who is growing faster..." SEMICONDUCTOR DIVISION o

Excellence in Electronics

ELECTRONICS— February 13, 1959 127 e kbe acid reached their decisions in favor of the inventor. Convey the thought GUARANTEED that justice prevails in our courts and that inventors are protected LEAKPROOF and rewarded for their ingenuity. WITH NEW This idea developed at a Chris- tian Family Movement meeting of SUPERIOR three neighbor couples in our house SEALING ° last night, discussing what we could do to combat communism. Sturges Storage Battery You and fellow editors of ELEC- the answer to any portable power problem TRON Ics and other McGraw-Hill r• new method used for completely sealing all binding and terminal posts, magazines are in a position to prevents any leaking or creeping of electrolyte wreck the whole USSR scientific • can be encased with any electronic units without damage from corrosion program without bombs or bullets. • non-spill in any position Just play upon human avarice. • redesign of "H" type cells increases output capacity a full 20% Over catalogued rating JAMES P.K ENNEDY. • no liquified gas or vapor is discharged from cells on charge or discharge • lightweight transparent molded plastic case CHICAGO

Write for FREE literature on various types of storage batteries. *Patents Pending Although our first reaction to CONSULT US ON ANY SPECIAL this idea was altogether positive, BATTERY APPLICATION PROBLEMS it will remain an idea for several cogent reasons. For one thing, there are agencies and organizations that are far better equipped than we, whose sole purpose is to Bush Terminal Building No. 4 • 28-34 35th Street, Brooklyn 32, New York put across exactly the message that reader Kennedy suggests. CIRCLE 163 READERS SERVICE CARD Second thoughts bring some doubts. Our experience with So- viet thought leads us to believe YOUR BEST BUY! their whole semantic framework • rejects luxury and almost wel- comes hardships and tribulation as RIBWOUND HI WATTAGE necessary corollaries of power. They honor toughness and scorn comfort, and in many cases would endure anything to see their coun- RESISTORS try master of the world. Your inquiry or drawing will bring quotations Furthermore, is it really morally samples on request proper to interfere with the pur- suit of scientific truth anywhere? MILWAUKEE RESISTOR CO. It is against the pseudo-religion of 702 W. Virginia Street • Milwaukee 4, Wisconsin totalitarianism that we should take our stand, not the Soviet CIRCLE 164 READERS SERVICE CARD scientific program.

sending a bill? A Square Root The article "Passive Elements It'll get there quicker if you give your postal delivery Form Time Delay" (p 70, Jan. 16) zone number with your address. should have a square-root sign in the time-delay equation. I am correcting my copy to read: The Post Office has divided 106 cities into postal delivery zones to speed mail delivery. Be sure to include zone number when writing to these cities, = be sure to include your zone number in your return ALFRED W INDSOR address—after the city, before the state. UNIVERSITY OF CALIFORNIA BERKELEY, CALIF.

128 February 13, 1959 —ELECTRONICS r. <

eidfe#1,0000 .. • !' ' 60%0/40;#0;,,,, • •! •1 • •,..

•if // •••; e *41 11' - — • •▪ - •••-; ▪ • -

underwater-to-air-to-underwater SUBROC antisubmarine missile is being developed at Goodyear Aircraft.

If you have a Bernoullian bent, this program will appeal to you— and so will the company —the people and the organization.

So, too, will rock-solid programs in astronautics— already underway at Goodyear Aircraft—destined to throw light on the dark side of the moon.*

If you're good, we'll sign you in. If we sign you in,

you won't want to leave— for reasons as sound as your future. And ours.

Write: Mr. Charles Jones, Director of Technical & Scientific Personnel, Goodyear Aircraft Corporation, Akron 15, Ohio.

*Programs in rocket propulsion, interplanetary guidance, nose cones, advanced black boxes, crew-escape capsules —also in ground support systems for missiles, radar structures, radomes, radiation research, structures engineering. EMPLOYMENT OPPORTUNITIES

RESEARCH &DEVELOPMENT

Unusual Career Openings in RAPIDLY growing company for PROJECT ENGINEERS SR. ENGINEERS & ENGRS. BS-EE or PHYSICS Several years or more experience in cir cuitry and equipment design or applicable background—to work on UHF and VHF systems. Wide band knowledge desirable for challenging assignments on electronic countermeasures systems for military application and electronic instruments for commercial use. Excellent salary range at all levels. Close association with acknowledged leaders who will aid your professional growth and develop your engineering abilities. Profit Sharing Retirement Plan. Many other Benefits.

Call tor interview I. V. Hicks OVerbrook 1.7100 or send resume in confidence to:

INSTRUMENTS FOR INDUSTRY, INC.

101 New South Rd. Hicksville, L. I.

QUARTERBACKING THE EAGLE PROJECT DISENCHANTED Bendix Aviation Corporation will ized work involved in the Eagle be prime contractor for the Eagle project and other important system ENGINEERS

missile—and Bendix Systems Divi- programs at Bendix Systems Division. If your present employer has failed to utilize your full potential, why not per- sion will quarterback the project. Located adjacent to the Engi- mit us to explore the parameters for Latest in a series of important your personal qualifications with the neering campus of the University of many dynamic young companies in defense projects to be assigned Bendix Michigan, Bendix Systems Division aviation, electronics, missiles and rockets. We now have in excess of 4,000 Systems, the Eagle will be a long- offers the better man an outstanding openings in the $8,000 to $40,000 bracket, all of which are fee paid. Why range, air-to-air missile designed for opportunity to join an organization wait? Send resume in duplicate at once to:— fleet air defense and interception with full facilities for encouraging FIDELITY PERSONNEL missions. his finest work. Ann Arbor is a 1218 Chestnut Street, Philadelphia 7, Pa. Responsible for systems manage- wonderful place to live and raise a ment and engineering in connection family, a town which combines life with the project, Bendix Systems in a college community with the Division will also direct the develop- nearby advantages of alarge city. RATES ment of the Eagle missile, electronic If you are interested and qualified - guidance, and fire control equip- in weapons system planning, re- Employment Opportunities" ment in the launching aircraft. search and development, you are Displayed—The advertising inch is 528.67 Engineers and scientists with invited to write to Bendix Systems per inch for all advertising appearing on other than a contract basis. Contract rates missile experience may find that Division, Dept. B2-13, Ann Arbor, quoted on request.

their talents are suited to the special- Michigan. An advertising inch is measured 7,8" vertically on a column-3 columns —30 inches to a page.

Subject to Agency Commission.

Undisp/ayed-52.40 per line, minimum 3 lines. To figure advance payment count 5 average words as a line.

Discount of 10° 0 if full payment is made in advance for 4 consecutive insertions. Not subject to Agency Commission. Bendix Systems Division Send NEW ADS to ELECTRONICS, Class. Adv. Div., P. 0. Box 12, New York 36, -more N. Y. ANN ARBOR, MICHIGAN AVIATION CORPORATION

130 February 13, 1959 — ELECTRONICS EMPLOYMENT OPPORTUNITIES

ile w (tl.ea s o owth ENGINEERS •SCIENTISTS rarl Yo u e(ine a:p flog' gr

at IBM in design R&D and development Opportunities in of semi-conductors Many new designs in IBM circuits CALIFORNIA and systems require the latest advances in the semi-conductor field. IBM's program includes theoret ical With SYLVANIA and experimental studies in the most advanced semi-conductor devices and technology. An example

ELECTRONIC ENGINEERS of original IBM development is the R&D in electronic countermeasure NPN high-speed drift transistor for systems including transmitters, receivers. analyzers, direction finders, logical switching and high-power data handling. RF circuits di antennas. core driving. These programs are FIELD ENGINEERS OM% opening up new opportunities for To work in field on varied domestic & foreign assignments, to install elec- high-level professional people. Re- tronic equipment, perform engineering teats, train military personnel. lated areas where opportunities and provide engineering assi st ance to military commanders. BS degree. exist include: applied mathematics

TUBE ENGINEERS and statistics, circuit research, Design, construction & testing of logic, cryogenics, optics, phosphors, Traveling Wave tubes. Minimum 1 year experience in test & evaluation magnetics, microwaves, theory of of TWT's. solid -st at e, transistor design. SR MECHANICAL ENGINEERS

Perform mechanical design and test of A career with IBM offers advance- tubes, components & tooling. 5 years experience in mechanical, design, lett- ment opportunities and rewards. ing & evalum ing special purpose tubes. You will enjoy professional free- SYSTEM STUDIES dom, participation in education Anaylsis and logical design of digital computer circuits. 7 or more years programs, and the assistance of experience desirable in varied phases of electronic systems analysis, with specialists of diverse disciplines. emphasis on computer logic. Advanced degrees desirable. Working independently or as a re- spected member of a small team, COMPUTERS & DATA HANDLING your contributions are quickly D&D of transistorized circuits & high speed digital computer elements. recognized. This is a unique op- Openings at all levels for engineers with experience in computer design di portunity to ally your personal transistorized circuits. growth with a company that has MICROWAVE ENGINEERS an outstanding growth record. Plan & perform microwase experiments on ferrites & gaseous electronic phenomena in relation to develop- QUALIFICATIONS: B.S., M.S. or ment of microwave control devices. Êxperience in microwave transmission Ph.D. in one of the physical sciences & measurement required with experience in high vacuum systems desir- —and proven ability in the field of able. semi-conductors. RESEARCH SCIENTISTS Tu perlorm theoretical analysis & For details, write, outlining conduct experiments in production of ultra-violet radiation, microwave background and interests, to: breakdown in molecular gases & Ilse transmission of electromagnetic waves Mr. R. E. Rodgers, Dept. 554-B2 through ionized shock fronts & plas- IBM Corporation mas. Advanced degrees desirable. 590 Madison Avenue Please send your resume to New York 22, N. Y. Mr. J. C. Richards Nt- SYLVANIA SYLVANIA ELECTRIC PRODUCTS INC • P.O. Box 1296 Mountain View, California 'IBM 6e, INTERNATIONAL BUSINESS MACHINES CORPORATION® ELECTRONICS — February 13, 1959 131 EMPLOYMENT OPPORTUNITIES

MAGNETRON CATHODE ENGINEER

Engineer or scientist with min. of 2 years experience in magnetron cathodes. Work in non-military research and development. Stable employment with an aggressive company.

Send resume to: Attn.: Sam Kellough • • • FRANKLIN MFG. CO. • 65-22nd Ave., N.E., IAPRIME Minneapolis 18, Minn.

.10DDL•ss Do A" No. REPLIES To: Do, No. thio ¡SYSTEMS CONTRACTOR WILL If, 050, HMI, xl you. A. Ell 1011K 3G: P. 0. 00X • 1 rti IC.1(10 II: .120 N. MfrIllgart Are. •• s IV ple niNcisro ;: 00 Post 81, •e• Lami POSITION VACANT Electronic Circuit Design Engineers—Several years experience and graduate training desirable but not required 1 for challenging cir- /YOUR PROFESSIONAL GROWTH cuit design problems. Ability to work in small, outstanding group on varied high cali- • ber design projects e.g. computer techniques • application, data accumulation and reduc- ••• The wide latitude offered by Republic Aviation's new programs will tion, pulse amplifier and discriminator design. Phillips Petroleum Company, Atomic Energy enhance your career development... Division, P.O. Box 20 67-DII. Idaho Falls, Idaho. BECAUSE... you will be working on electronics systems involved in all known parameters of flight—from the hypersonic velocities of POSITION WANTED ballistic missiles to the zero speed of helicopters Wanted—Concern needing top-quality engineering—HME and BEE degrees-10 years experience in industrial, military, and mis- BECAUSE .you will broaden your disciplinary background by see- lle fields—prefer Mid-West location. PW- ing the total systems picture — from design to hardware. You will be i62 6, Electronics. able to communicate directly with the people who design the actual flight vehicle structures and related subsystems PROFESSIONAL SERVICES BECAUSE ...you will be a "ground floor" participant in Republic's new $35 million R&D program, conceived to bring about revolutionary YARDNEY LABORATORIES, Inc. advances in aircraft, missile and space technology 'Pioneers in (sanie? Pon, r'' • Electro -Chemical Generators of Energy Investigate these electronic opportunities with Republic— "from of illirralls to meontraffs"• In 1, Leonard Street WOrth 6-3100 New Vol k 11. N. Y. 'TM.

Inertial Guidance Systems Engineering Inertial Navigation Missile Arming & Fusing FOR RATES AND Digital Computer Development Jamming & Anti-Jamming ADDITIONAL INFORMATION Radar Design Infrared Microwave Circuitry & Components Ranging Systems About Classified Advertising Telemetry-SSB Technique Radio Altimeters Contact The McGraw-Hill Office Information Theory Propagation Studies Nearest You Countermeasures Ground Support Equipment ATLANTA. 3 DETROIT. 26 Radome & Antenna Design Airborne Fire Control 1301 Rhodes. 856 Penobscot Bldg. Haverty Bldg. WOodward 2-1793 Doppler Radar System & Component Packaging JAckson 3-6951 D. M. WATSON Receiver & Transmitter Design Automatic Airborne Flight Controls M. H. MILLER LOS ANGELES. 17 1125 W. 6 St. Miniaturization-Transistorization BOSTON. 16 Airborne Navigational Systems 350 Park Square HUntley 2-5450 R. L. YOCOM Missile Checkout Systems ; Electronic Display & Plotting Boards HUbbard 2-7160 D. J. CASSIDY NEW YORK. 63 500 Fifth Ave. CHICAGO, 11 Oxford 5-5959 520 No. Michigan Ave. D. T. COSTER Please send resume in complete confidence to: MOhawk 4-5800 R. P. LAWLESS W. J. HIGGENS PHILADELPHIA, 3 D. C. JACKMAN Mr. George R. Hickman, Engineering Employment Manager Six Penn Center Plaza CLEVELAND. 13 LOcust 8-4330 1161 Illuminating Bldg. T. W. McCLURE SUperior 1-7000 H. W. BOZARTH 41501 eirEIPPLIffifeW Al IVIA 774E7 A/ W. B. SULLIVAN ST. LOUIS. 8 DALLAS. 1 3615 Olive St. Farmingdale, Long Island, New York 1712 Commerce St., JEfferson 5-4867 Vaughn Bldg. SAN FRANCISCO. 4 Riverside 7-5117 68 Post St. GORDON JONES DOuglas 2-4600 F. E. HOLLAND R. C. ALCORN

132 February 13, 1959 — ELECTRONICS EMPLOYMENT OPPORTUNITIES

up atree?

Are you isolated from challenging ... and there's big opportunity engineering assignments? Gil - at BENDIX-prime contractor filian provides this challenge plus a friendly, informal atmosphere for the TALOS MISSILE that is conductive to scientific If you have the qualifications, you time. You'll have the use of facilities achievement. Diversified technical can build yourself an enviable en- and equipment that are unmatched. gineering career with Bendix—and opportunities are being offered You'll enjoy a pleasant four- enjoy living in one of America's fine season climate, have excellent edu- to electronic engineers with a min- residential and recreational areas. cational facilities available to you imum of 3 years experience in Bendix Missiles has opportunities and your family, and have easy now for engineers of exceptional access to Chicago. Most of all, you'll missile systems, microwave, radar ability. You'll be in the technical find satisfaction in doing important receivers, digital computers, pulse forefront of your profession at work alongside men who are profes- circuitry, and countermeasures. Bendix, working with men who have sional engineers. Mail the coupon sparked some of the most important today for a copy of -Opportunities technological achievements of our Abound at Bendix Missiles". You owe it to yourself to write to Bendix PRODUCTS DIVISION Missiles wegignofiA/ AVIATION CORPORATION

Bendix Products Division—Missiles Giellan 403A So. Beiger St., Mishawaka, Ind. Gentlemen: Iwould like more information concerning opportunities in guided missiles. Please send me the booklet "Opportunities Abound at Bendix Missiles".

DIR. SCIENTIFIC PERSONNEL. DEPT. 53 NAME 1815 VENICE BLVD., LOS ANGELES, CALIF. ADDRESS

CITY STATE_

ELECTRONICS—February 13, 1959 133 EMPLOYMENT OPPORTUNITIES

AN INVITATION TO THE CREATIVE ENGINEER Research employs a diversified group of creative people; the Practical handbook gives

mathematician, the physicist, the engineer, the psychologist, • Clear explanations of all working together as ateam to find the solution to unsolved basic theory problems. • Applications of theory to real design prob- HRB invites you to become part of this team of specialists. lems The company offers opportunity for electronic research, de- • A wealth of needed design data velopment and design in a wide range of projects. The talented person may assume full responsibility on agiven job. TIIIS handbook of fundamentals and data will help you in the design of all types of Those with initiative and imagination may broaden their electronic equipment. A large number of the scientific know-how in a professional environment. circuits used in many different applications is covered, together with theoretical and Liberal company benefits, promotions based on merit, and the technical discussions and explanations, de- opportunity for graduate study at neighboring Pennsylvania sign examples to show application of theory, State University are some of the many advantages at HRB. and graphical and tabular (lata needed in day-to-day design work. The entire electronic field is covered, ranging from vacuum Become part of an established research organization. tube and transistor fundamentals, voltage and power amplifiers, to such topics as com- Investigate by writing to: puter and servomechanism techniques, waveform and network analysis. Personnel Director The aim throughout the book is to present detailed, Practical design data in a clear HAILER, RAYMOND, and BROWN, Inc. and concise manner. The book covers many topics at great length, Science Park, State College, Pa. and the treatment of A Division of The Singer Manufacturing Company several subjects, such 10-Day as receivers, is not only FREE unusually complete, but by far the clearest ex- TRIAL planation of the essen- EASY tials of the particular field available to the TERMS ELECTRONIC Graduate electronic engineers with at least engineer or designer. 2 years experience desired in transistor cir- cult design. Applicant should have a thor. ough background in transistor theory, ap. ELECTRONIC ENGINEERS plications and techniques. Opportunity to work with a small group on advanced development work in Instrumentation. DESIGNERS' • 100% reimbursement of advanced study tuition • Excellent working conditions and fringe benefits HANDBOOK Submit complete resume to Mr. Sumner Ackerman, V. P. in charge of ROBERT W. LANDEE Research ct Development, or phone ATtleboro 1-3880. COVERS: General Alanager and •transistor circuits Chief Electronic Engineer, • computer elements Potter Pacific corp. INSTRUMENT DEVELOPMENT LABORATORIES, Inc. • servomechanisms DONOVAN C. DAVIS and applications Assistant Director • low-noise r-f am- Subsidiary of of Engineering plifiers Gilfillan Bros. inc. • chopper-stabilized ROYAL McBEE CORPORATION amplifiers ALBERT P. ALBRECHT • low-power trans- Assistant Director 67 Mechanic Street formers of Engineering • antennas Gilfillan Bros. Inc. Attleboro, Mass. • and many more, 1016 pages, 6 x 9, for a complete 982 illustrations, $16.50 coverage of the EASY TERMS: $6.50 in 10 67111111111111111111111111111111111111111111111HIIII- 111115111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111E field of electronics days, then $5.00 monthly until $16.50 is paid FREE EXAMINATION COUPON We are a pioneer manufacturer (established 1934) of an expanding prestige line of precision electronic McGrow-Hill Book Co., Dept. FL-2-13 instruments. 327 W. 41st St., New York 36, N. Y.

-'sill lv Lanci-•, Da,. and Alb, reitt's ELEC- Electronic We require men with E.E. degree or equivalent TRONIC DESIGNERS' HANDBOOK for 10 days' 3-5 years experience with electronic equipment. examination on approval. In 10 days, I will Actual sales experience desirable. (Otis* one send you the full price of e10.00: or :3 $0.111, glen $5.00 a month until the lull prim You will travel the New York to Washington, D. C., Is paid. Otherwise, t will return hook postpaid. Field Sales (We pay delivery costs if you reptil with this area & receive compensation commensurate with coupon: same imurn privilege.) your aptitude and experience. PRINT Name Engineers You will enjoy ideal country living (1 hour N.Y.C.) the informal atmosphere of a small, growing com- Address pany. City Zone.... State I'!.' forward complete resonin to l'ompanY Position BOONTON RADIO CORP. For to h., and term, oufürle write 11,r:raw-Hill intl., N.Y.C. FL-2 -ln BOONTON, NEW JERSEY

134 February 13, 1959 — ELECTRONICS EMPLOYMENT OPPORTUNITIES

PERSONNEL MANAGERS Of prime career importance LOOKING FOR Experienced Engineers ... Technical Personnel? complualeitrpt between you and the Company where Write for a free copy of: you choose to exercise your talents "How You Can Reach The A crea ive man finds the , Experienced Engineer .. ." plane of transmittance 4 at Norden Laboratories coinciding with his own

An engineer needs an environment that is professionally congenial — in order to live up to his creative potential. So — before you come up to visit us at Norden Laboratories, we'd like to give you a brief outline of what we're like and how we operate: • we're mainly R&D and we work on adiversity of projects in forward areas B we're organized on aDepartmental-Project basis to take full advantage of the special skills of our professional people. Versatility is encouraged The top-flight engineers and B we cut down on formality and red tape wherever we can • our technically-minded management is in close touch with the staff, technical personnel you want making it possible to give individual recognition where due are at a premium...as this If this brief sketch of Norden Labs sounds "compatible" with your aims twelve page booklet points and interests, inquire about these immediate openings at our White Plains, out. How you can reach and NY and Stamford, Connecticut locations: TELEVISION & PASSIVE DETECTION QUALITY ASSURANCE influence these men is the story • Transistor Circuit Development • • Systems Reliability Analyses • Corn- High & Low Light Level TV Camera De- ponent Reliability & Evaluation • Vibra- told. sign • Video Information Processing • tion, Shock & Environmental Test • TV Monitors & Contact Analog Displays Standards The booklet tells where to • Military Transistorized TV Systems ENGINEERING DESIGN (Also openings for recent EE grads) • Electronic Packaging find the experienced engineer. RADAR & COMMUNICATIONS FUTURE PROGRAMS Design & Development of: • Systems Engineer (SR) — Broad crea- It explains how you can make • Antennas • Microwave Systems & tive background, ability to communi- contact .. . channel and con- Components • Receivers • Transmitter cate— experience in radar, TV systems Modulators • Displays • Pulse Circuitry — supervise R&D proposals • Senior centrate your employment ad- (VT & Transistors) • AMTI • Data Trans- Engineer — Cost development for R&D mission • ECM proposals. Require broad technical experience in electro -mechanical and vertising to just the men with DIGITAL electronics systems • Digital (Senior) Design: Logical, Cir- STABILIZATION & NAVIGATION the job qualifications you want. cuit, Magnetic Storage • Servo Loops for gyro stabilization, Included are testimonials from PROJECT ENGINEERING antenna stabilization, accelerometer • Senior Engineers — Engineering Pro- force balance, antenna scanning • Re- personnel men who use techni- gram Mgt. peater Servos • Transistorized Inte- grator, DC Amplifier, Servo Amplifier • cal publications successfully... SYSTEMS ENGINEERING Magnetic Amplifiers • Transistorized • Synthesis, analysis & integration of DC & AC power supplies • Gyros & Ac- sample advertisements that got electronic & electro -mechanical systems celerometers

results. .. helpful hints to con- Descriptive Brochure Available Upon Request sider and pitfalls to avoid when you prepare your copy and TECHNICAL EMPLOYMENT MANAGER layout for an Employment Op- NORDEN LABORATORIES portunity advertisement. NORDEN DIVISION — UNITED AIRCRAFT CORPORATION 121 WESTMORELAND AVENUE • WHITE PLAINS, NEW YORK

Write for your free copy to: Iam interested in obtaining further information on opportunities at Norden Laboratories. Mr. Thomas Bender NAME Classified Advertising Division ADDRESS McGraw-Hill Publishing Co., Inc. P.O. Box 12 CITY 7ONF STATr New York 36, New York DEGREE YEAR (United States Citizenship Required)

ELECTRONICS — February 13, 1959 135 EMPLOYMENT OPPORTUNITIES

SEARCHLIGHT SECTION (Classified Advertising)

BUSINESS OPPORTUNITIES

EQUIPMENT -USED or RESALE

DISPLAYED RATE The advertising rate is $24.75 per inch for ;ill advertising uppearing on other than a Lontract basis. Contract rates quote() on reglieSt. AN Ao\l•nt•risixo INcx io measured '7¡, inch verticany on one column, 3 raluarns- 30 inches— to a page. EQUIPMENT WANTED or FOR SALE ADVERTISEMENTS acceptable only in Displayed Style.

apioneer and one of the leading producers of electronic UNDISPLAYED RATE flight simulators, is increasing its engineerng activity to $2.40 a line, IllinSIIIIIM 3 lines. To figure advant e payaient «count 3 average words include volume engineering programs in the fields of as a line. analog and digital computer techniques, telemetry, tran- L'Fit II'! SA LS. $2.40 a line an insertion. Isoti :NUMBERS count as one line addi- sistor applications and light/optical scanners. It is also tional in undisplayed ads. rapidly expanding its research and development opera- DISCOUNT of in.", if full payment is tions in the fields of ionospheric propagation & UHF made in advance. for four consecutive in- _verti,,na if undisplayed :Ms (not including communications. Challenging and diversified assignments in product design and research and development are offered by this constantly growing organizaC to the career-minded U. S. Army Tele- engineer or scientist who wishes to eombine stability with phones EE-8 fully re- the latitude necessary for rapid professional and finan- conditioned. Suitable cial growth. fo r intercommunica- 1 .diate openings exist for qualified, professional per- tion between 2 or sonnel whose areas of experience coincide with the fol- more points. $35.00 lowing requirements: for 2 telephones, including 100 ft. of DESIGN AND RESEARCH AND wire and batteries. DEVELOPMENT PROGRAMS DEVELOPMENT PROGRAMS Additional wire Itt per ft. or $25.00 per IONOSPHERE mile. Write for free list on telephones. CIRCUIT DESIGN PHYSICIST All shipments F.O.B. Simpson, Pa. (ALL LEVELS) BS degree plus 3 to 5 years' experience in the study of iono- TELEPHONE ENGINEERING CO. BSEE, for transistor circuitry, ap- spheric phenomena. Familiar with present state-of-the-art of upper Dept. E-39 Simpson, Pa. plication, analog and digital com- atmosphere and hove an under- puter techniques, DC amplifiers, standing of present programs us- simulation, telemetry and design ing rockets and satellites for studies in E & F regions and be- Money saving prices en tunes. TV, Radio, Trans- of systems and components. mitting. and Industrial Types. New, lot quality. yond. Will work with radiation guaranteed. Top name brands only. Government BS in Physics, plus experience in problems spanning VLF to VHF surplus and commercial test, lab, and communica- region of spectrum with emphasis tions equipment in stock. Sell us your excess tubes one or more of the following: op- on HF backscatter techniques and and equipment. Unused, clean tubes of all types wanted. Send species details in first letter. Write tics, hydraulic instrumentation, hu- their applications to communications. Will design and conduct for "Green Sheet" catalog 25C. man engineering, numerical analy- BARRY ELECTRONICS CORP. field experiments. sis, computer techniques. 512 Broadway WA 5-7000 New York 12, N. Y. GLOBAL COMMUNICA- TIONS SPECIALISTS AERODYNAMICIST BS degree plus 5 to 10 years' experience embracing theoretical as lab grade TEST EQUIPMENT for sale BS in Aero E, plus 3 years' ex- well as practical knowledge of standard brands—military surplus perience in aerodynamics, prefer- communications systems design (new or professionally reconditioned) involving F-layer ionospheric problem and budget- ably in airplane stability control, propagation techniques. Working experienced solvers power plants, performance or knowledge of modern high-power cutters simulation. HF transmitters and HF receiving ENGINEERING ASSOCIATES Systems. 434 Patterson Road Dayton 19, Ohio ELECTRONIC TECHNICAL WRITERS PHYSICIST BS degree with 3 to 5 years' ex- BS in EE or Physics, or equiva- A perience in diffusion pump high- DAR lent, plus 2 years' experience in vacuum techniques and have an From Stock Delivery the preparation of operational understanding of classical gas dis- Skysweep Antenna Pedestal. SCR 584 & 784 charge physical phenomena. Will Search-track Radars, MPN-I13 GCA. APS-10. and maintenance, manuals and en- APS-3I, APS-33 Airborne. conduct laboratory investigations Navy Weather-Eye Radars gineering reports concerning elec- of simulated upper atmosphere experiments. RADIO RESEARCH INSTRUMENT CO. tronic systems and components. 550 Fifth Avenue, N. Y. 36, N. Y. JUdson 6-4691

EXCELLENT SALARIES commensurate with ((loin (Ina •v MODERN COMPANY BENEFITS Your Inquiries to including educational e i statue RELOCATION ASSISTANCE Advertisers Will IDEAL LIVING CONDITIONS Have Special Value .. . in suburban U «xhingron. C. EXPENSE-PAID INTERVIEWS WITH SELECTED APPLICANTS —for you—the advertiser—and the publisher, if VOB mention Send Resume Staling Education & this publication. Advertisers value Mr. R. J. REID, Technical Employ-ment lanager highly this evidence of the publication you read. Satisfied adver- R-C 0 tisers enable the publishers to se- Nuclear Products — Erco cure more advertisers and—more Div 1510. OF ACV STRIES INCORPORATED advertisers otean more information on more products or better RIVERDALE, MARYLAND WARFIELD 7-4444 service—more value—to YOU.

136 February 13, 1959 — ELECTRONICS INDEX TO ADVERTISERS

*AMP Incorporated 21 *Ace Electronics Associates, Inc 98 Aeronautical Communications Co. 10 *Airpax Electronics Incorporated 96 All Products Co 124 Allegheny Ludlum Steel Corp. 6 DIGITAL READ-OUT *Allied Control Company, Inc 99 Ampex Corporation 18, 19 Audio Development Co. 108 COUNTERS Autonetics 34 by DURANT *Bead Chain Mfg. Co 124 *Bendix Aviation Corp., Red Bank Div. 94 Design engineers can now select one *Bendix-PacifIc 125 *Boesch Mfg. Co., Inc. 112 or more standard units from arange Borden Chemical Co., Resinite Dept 119 Bruning Co.. Inc.. Charles 109 of 96 Instrument Counters, having the Bureau of Engraving, Inc 137 same type of frame Burroughs Corporation 104 and configuration. This could be your next circuit— every hole o bulls-eye *Christie Electric Corp 116 *Cinch Mfg. Co. 71 Clare & Co., C. P. 13 *Cievite Transistor Products 15 *Coto-Coil Co.. Inc. 126 *Cross, Co. II 101 *Cubic Corp. 32 Printed Circuit 1/12 WIDTH UNIT WHEEL *Dale Products Inc. 84, 85 Delta Air Lines 107 *DeMornaty-Bonardl 126 Reliability Deutsch Co. 88 Durant Mfg. Co. 137 Dymec, Inc. 12 S-Y-8822 WITH SINGLE WIDTH through Custom UNIT WHEEL *Easters' Industries, Inc. 8, 9 Edo Corporation 125 Electro Instruments, Inc. 87 SINGLE BANK SERIES Electronic Batteries, Inc. 128 (Right or Left Drive) Production Electronic Instrument Co. (RICO) 38 2 to 7 Figures *Empire Devices Products Corp 39 DOUBLE WIDTH *Englehard Industries, Inc 16, 17 UNIT WHEEL *Epsco, Inc. 73 Estes-line-Angus Company. Inc., The 103 Here is a family group that pro- Have you ever had to discard vides uniformity in digital record- Fairchild Semiconductor Corp. 79 freshly delivered printed cir- ing to satisfy nearly all design cuits that didn't meet your requirements.. .on radar equip- specifications? Whether the *Gamewell Co.. The 120 Garrett Corporation, The 92, 93 ment, navigation instruments, holes you need are plated or Graphic Systems 125 *Grayhill, Inc. 97 computers, missile tracking de- eyeletted, whether the base Gulton Industries, Inc. 110 material is fiber or plastic, devices, and gauging instruments. mand precision first! Hallamore Electronics Co. 80 They are compact, average weight 'llar clon, A. W.. Company, The 103 The Bureau is striving for Heiland Div. of only 2 ounces, have easy to read perfection in each circuit before Minneapolis-Honeywell 42, 43 *Hewlett-Packard Company 7 figures, white on black .. .speeds it reaches your plant. We have *Hughes Products Div. Hughes Aircraft to 2500 RPM. Available in single developed production flexibili- Co. 25. 26, 27, 28 *Byron Eastern, Inc. 76, 77 or dual bank style, in 2to 7figures ty to custom-tailor our manu- capacity .. . three styles of unit facture to your circuit. That is *Indiana Steel Products Co. 36 why our engineers and person- International Business Machines Corp 49 wheel configuration. International Electric Corporation 91 nel are successfully building *International Electronic Research Corp. 100 boards in the varified atmos- *Intemational Resistance Company 47 phere of missile-tolerances at a rate that exceeds normal *Kearfott Co. 48 •Keithley Instruments 20 probability. Consider the In- Kleinschmidt Div. of Smith-Corona dustrial Division of the Bureau Marchant, Inc. 22 •Kurman Electric Co. 124 of Engraving, Inc. for your important circuits. .. why set- tle for less? *Lambda Electronics Corp. 3 4-4-Y-8831 WITH Linde Company 83 1V, WIDTH UNIT WHEEL Little Falls Alloys 107 Lockheed Aircraft 123 We have o limited surplus of our U.S. DUAL BANK SERIES Air Force approved QUALITY CON- (Right or Left Drive) TROL MANUAL FOR PRINTED CIRCUIT Mallory & Co., Inc., P. R. 50 2 to 5 Figures EA. BANK BOARDS AND BOARD ASSEMBLIES. Marconi Instruments 46 Copies will be sent to qualified per- Marion Electrical Instrument Co 38 sons on request ... write today on McGraw-Hill Book Co 92 Milwaukee Resistor Co. 128 your company letterhead.

Send `for DURANT MFG. CO. Member of the Institute of Printed Circuits •NYT Electronics, Inc. 97 Nicad Div.. Gould-National Batteries FACTUAL 1912 N. Buffurn St., Milwaukee 1, Wis. Inc. 118 BULLETIN 12 Thurbers Ave., Providence S, R.I. BUREAU OF ENGRAVING, Inc. North American Aviation, Inc. 103 North American Electronics 120 No. 400 Representatives in Princwol Cities Industrial Division *Northeastern Engineering 114

500 S. 4th St., Minneapolis 15, Minn. dsizzà 'See advertisement in the June, 1958 Mid-Month Telephone FEderal 9-8721 ELECTRONICS BUYER'S GUIDE for complete line of products or services.

CIRCLE 166 READERS SERVICE CARD CIRCLE 167 READERS SERVICE CARD ELECTRONICS — February 13, 1959 137 *OhmIte Mfg. Co. 23

PCA Electronics, Inc. 31 Peerless Electric Co. 138 Pentium, Inc. 121 Philbrick, George A„ Researches, Inc-• • 101 METAL FILM RESISTORS

*Quail -Tech Laboratories 105 1,t3 •• 0 CC)

*Radio Corporation of A merica .41, 4th Cover *itadio Freoio•nt•y Laboratories, Inc..... 117 NEW! This precision low noise *Raytheon Mfg. t'o. 2nd Cover 127 metal film resistor meets and Relay sales. Inc. 44 exceeds requirements with tem- .liesistance Produets t'o 138 perature coefficient of plus or Ro>al !Electric t'o. 45 minus 50 ppm 'C indepent of Rust Industrial Co., Inc 101 resistance value. Standard tolerance plus or minus 1 per *Sanders .tssociates 105 cent. Type WHM-1.125" Sheraton Hotels 29 long x .406" diam.—is *Sigma Instruments, Inc. 106 equivalent to MIL Style Spectrol Elect '.., Corp 113 RN 75, maximum voltage Sprague Electric Co. 5 rating 500V. Type WFH- *Standard Electric Time t'o. 40 .781" long x .250" Struthers-lbion, Inc. 111 diam.—equivalent to *Sylvania Electric Products, Inc 33 MIL Style RN 70, •Synt ' Instruments, Inc. 107 maximum voltage rating 350V. *Technology Ilistrument Corp. 81 Teletronics Laboratory, line. 126 Enclosed in spe- *Texas Instruments Im•orporated..3rd Cover cially designed her- Thermal .‘meriean Fused Quartz t'o., metically sealed Inc. 105 plastic casing (pat- Thompson -Ramo Wooldridge, Inc ', ent pending) to *Tobe Deutschman!! 102 protect precision *Transitron Electronic Corporation 37 resistor element. *Tung-Sol Electric, Inc. 75

United Shoe Machinery Corp. 95

*Weinschel Engineering Corp. 14 Westinghouse Electric Corp, 24, 115

PROFESSIONAL SERVICES 132

CLASSIFIED ADVERTISING

F. J. Eberle, Business Mgr.

EMPLOYMENT OPPORTUNITIES.129-136 RESISTANCE PRODUCTS EQUIPMENT (Used or Surplus New) COMPANY For Sale 136 914 S. 13 St. Harrisburg, Pa.

ADVERTISERS INDEX Specialists in manufacturing quality resistors: Precision

Barry Electronics Company 136 Wire Wound — High Voltage — High Megohm — High • These blowers were made for Frequency. Our test equipment and standards for Bendix Aviation Corp., checking and calibrating are matched only by leading Bendix Products, Guided Missiles 133 radia or electronic cooling appli- laboratories. Write for more information. cations. Peerless engineers design Bendix Systems Division 130 Boonton Radio Corporation 134 and build blowers and fans to Engineering Associates 136 customer, government and asso- Erco Plant Nuclear Products ciation specifications every day. Erco Div. of ACF Industries Inc. 136 HIGH MEGOHM RESISTORS Custom-made installations are our Fidelity Personnel Service 130 Type H. For electrometer circuits, Franklin Manufacturing Company 132 radiation equipment and as high re- specialty. We do the whole job sistance standards. Resistance avail- Gilfillan Brothers, Inc 133 able to 100 million megohms. .. . make the motor, the fan or Goodyear Aircraft Corp.. The 129 Voltage rating to 15,000 volts. blower .. . everything. Each unit Haller, Raymond & Brown, Inc 134 Low temperature and voltage co- is unconditionally guaranteed. Instrument Development Laboratories, efficient. Seven sizes, from /34 " Inc. 134 to 3" long, of which 2 meet re- Whatever your air flow require- quirements of MIL-R-14293A. Instruments for Industry 130 ments or application, it will pay Standard resistance tolerance International Business Machines Corp 131 10%. Tolerance of 5% and you to contact Peerless Electric. Norden Laboratories, 3% available. Also matched Do it today. Norden Div., United Aircraft Corp 135 pairs with 2% tolerance. Radio Research Instrument Company 136

Republic Aviation 132

Sylvania Electric Products Inc 131

Telephone Engineering Company 136

*See advertisement in the June, 1958 Mid-Month ELECTRONICS BUYER'S GUIDE for complete line FAN AND BLOWER DIVISION of products or services.

THE »0,4414. &eau co. This index is published as a service. Every care is taken FANS • BLOWERS • MOTORS to make it accurate, but ELECTRONICS assumes no 1446 W. MARKET ST. • WARREN, 01-110 responsibilities for errors or omissions.

CIRCLE 168 READERS SERVICE CARD CIRCLE 169 READERS SERVICE CARD 138 February 13, 1959 — ELECTRONICS NUMBER TEXAS INSTRUMENTS SEMICONDUCTOR REPORT ONE

`UW

Added reliability and economy are the dividends to users of Texas Instruments transistors made possible by SMART — newest tool of the Semiconductor-Components division Quality Assurance program. This Sequential Mechanism for Automatic Recording and Testing evaluates transistors automatically and economically with consistent accuracy.

Only advanced facilities can produce advanced components.

SMART, designed and built at TI, tests 18 transistor parameters and punches the results onto an IBM card coded to the corresponding transistor. Test results are then available for individual or collective statistical analysis.

With SMART, one operator can test a far greater number 11 TRANSISTORS IN EXPLORER IV of transistors than before ... automatically. Effective TI 'Explorer IV was developed on an extremely tight schedule Quality Assurance, advanced by SMART, is another reason and we wish to express our appreciation for the cooperation received from Texas Instruments which enabled why engineers the world over rely on advanced components us to carry this project through to asuccessful conclusion." from the nation's leading manufacturer of semiconductor James A. Van Agen Head, Department of Physics devices and precision components. State University of imva % TEXAS INSTRUMENTS INCORPORATED SEMICONDUCTOR-COMPONENTS DIVISION 4D POST OFFICE BOX 312 • 13500 N. CENTRAL EXPRESSWAY WORLD'S LARGEST SEMICONDUCTOR PLANT DALLAS. TEXAS TWO NEW RCA "FIRSTS" 0.6 -watt heater-power Vidicons - ...for transistorized TV cameras h

RCA-7263 for Severe Environmental Conditions

RCA-7262 for Moderate Environmental Conditions

Lowest heater-power Vidicons in television today, these new ing shock, vibration, humidity, and altitude. This Vidicon type short-length types are opening a new era in compact tran- is tested in combination with associated components under sistorized TV camera designs. Only 5!'s inches long, these re- environmental conditions according to the techniques of mili- markable camera tubes operate with only 0.6 watt of heater tary specifications MIL-E-5272B and MIL-E-5400. power—actually one-third less than any other commercial type RCA-7262 is for use in new, compact camera designs for Vidicon. Both types feature fast cathode warm-up time. And, industrial and broadcast applications—where environmental thanks to a closely controlled photoconductive layer, both requirements are moderate. types provide pictures with uniform background—and con- Want more details on these remarkable low-heater-power g sistent performance from tube to tube. Vidicons? Just call your RCA Field Representative. Or, for% RCA-7263 is for use especially in new TV cameras designed comprehensive technical data on either or both types, write to for operation under severe environmental conditions involv- RCA Commercial Engineering, Sec. B-19 -R-2, Harrison, N.J.

RCA Field Representatives ore here to help you: INDUSTRIAL TUBE PRODUCTS SALES .Newark 2, N. J., 744 Brood Street, HUmboldt 5-3900 •Chicago 54, It., Suite 1154, Merchandise Mart Plaza WHitehall 4-2900 RADIO CORPORATION OF AMERICA . •Los Angeles 22, Calif., 6355 E. Washington Blvd. RAymond 3-8361 Electron Tube Division Harrison, N. J. •Detroit 2, Mich., 714 New Center Bldg., TRinity 5-5600 GOVERNMENT SALES •Newark 2, N. J., 744 Broad St., HUmboldt 5-3900 •Dayton 2, Ohio, 224 N. Wilkinson St., BAldwin 6-2366 Also Available at Authorized RCA Industrial Tube Distributors. •Washington 6, D.C., 1625 "K" St., N.W., District 74260