DOCSLIB.ORG

ADIO- ELECTRONICS in ALL ITS PHASES Another First! This Is the Long- Awaited Hallicrafters SX -42, a Truly Great Greatest Communications Receiver

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
ADIO- ELECTRONICS in ALL ITS PHASES Another First! This Is the Long- Awaited Hallicrafters SX -42, a Truly Great Greatest Communications Receiver LAPO De Forest Anniversary Number' A 40 Years of the Vacuum Tube ká ADIO- ELECTRONICS IN ALL ITS PHASES Another first! This is the long- awaited Hallicrafters SX -42, a truly great Greatest communications receiver. The tremendous frequency contin- range of the SX -42, greater than ever belole available in a receiver of this type, is made possible by the develop- uous frequency ment of a new "split-stator" tuning system and the use of dual intermediate frequency transformers. Packed coverage of any with advance features that every ham and every other radio enthusiast desires, the SX -42 clearly lives up to communications the Hallicrafters ideal of "the radio man's radio." From now on watch Hallicraflers - the name that's remembered by the veteran, preferred by the radio ama- receiver- from teur. See your distributor for demonstration of the SX-42 and for colorful literature describing this great set in 540 kc to 110 Mc complete technical detail. Because of the pre- cise engineering that must be done on the SX-42 and because the parts supply has not been con- tinuous, top produr. lion peaks have not yet been reached. In the immediate future deliveries will necessarily run behind the demand. but the SX-42 is definitely w orth wailing tor. $25000 Amateur Net hallicrafters RADIO Adjustable Bose rut uuAtrus CO .. IACILLlIC1 ot cSOla AHD 11.1(110141C wuVUrNr, CHICAGO IC u. S :. for "eye- angle" tuning No. B -42 áZ50 Io.e.A.stp....et ear Hallicrafters joins the entire radio industry in VIP congratulations to Lee De Forest ... without whose ingenuity and inventiveness such advanced communications equipment as the Hallicrafters SX -42 would have been impossible. SINCERELY, A N D A L L T H E J, \ HALLICRAFTERS KIT 1 I send you Soldering Equip ment and Radio Parts ; show you how to do Radio soldering; how to mount and connect Radio parts; give you practical experience. KIT 2 Early in my course I ,- you how to 3 buildtamw this N. R. I. Tester with parts I , send. ]t soon helps y _ fix neighbor - / You _...._......... _t,.. ..... hood Radios and earn EXTRA money , ' in are time. Technician Spare Time Se A cry ín by PtA __ with BIG KITS of Le ..., KIT 3 RADIO PARTS I send you You get parts to build Radio Circuits; APPROVED Do you want a good -pay job in then test them; see how r. far training the fast-growing Radio Industry they work; learn how to under -or your own Radio Shop? Mail design special circuits; how to the Coupon for a Sample Lesson locate and repair circuit defects. G.I.BI LL and my 64 -page book. "How to Be a Success in Radio-Tole- ' ,ion, Electronics," both FREE. See how I will train you at home -how you get prac- tical Rad,o experience building. testing Radio Ì You get parts to build circuits with BIC KITS OF )'ARTS I send! KÌ4 this Vacuum Tube Power Pack; make changes Many Beginners Soon Make Extra Money which give you experience with in Spare Time Whits Learning packs of many kinds; learn to The day you enroll I start sending EXTRA correct power pack troubles. MONEY JOB SHEETS that show how to make EXTRA money fixing neighbor? Radios in spare time while still learning! It's proba- bly easier to get started now than ever before, because the Radio Repair Business is booming. Trained Radio Technicians also find profitable opportunities in Police, Aviation. Marine Building this A. Radio, Broadcasting, Radio Manufacturing. Public Address work. Think MT 5 of even opportunities as Television, FM, and Electronic devices M. Signal Genera- become available tor gives you more valu- to the public! Send for FREE books now! able experience. It pro- Find Out What NRI Can Do For You vides amplitude- modulated Mail Coupon for Sample Lesson and my FREE 64 -page book. Read the signals for many tests and details about my Course; lettera from men I trained; see how quickly, experiments. easily you can get started. No obligation! Just MAIL COUPON NOW in envelope or paste on penny postal. J. E. SMITH. President, Dept. 7AX, National Radio In. titule, fionccr Home Study Radio School, Washington 9, D.C. Our 33rd Year of Training Men for Success in Rodio You build this KIT Ó Superheterodyne Receiver which brings in local and distant stations -and gives you more ex- perience to I MR. J. E. SMITH, President, Dept. 7AX help you I National Radio Institute win suc- I Washington 9, D.C. cess in Radio. 1 Mail me FREE. Sample Lesson and 64- 1 Page book about how to win success in 1 Radio -Television. Electronics. (No sales- man will call. Please write plainly.) Age My Course I Name Includes Training in Address City State TELEVISION (Please include Post Office zone number) ELECTRONICS `mm, -a FREQUENCY MODULATION Approved for Training under GI Bill RADIO -CRAFT for JANUARY, 1947 PS dC7E.70C3E o.. 0:e l/ i/ere.oae N. U. AUTO RADIO VIBRATORS ARE BUILT FOR ENDURANCE! 1. Welded pole pieces for life- 9. Face of center reed weight is time adjustment accuracy. surface -ground to improve mag- 2. Snug fitting synthetic sponge netic coupling. insulauon for quiet operation. 10. Center reed uniformly breakage. 3. Spot -welding of fingers, in stressed to prevent contact against each other and 11. Specially tempered reed and the center reed, reduces voltage side contact arms. drop in center reed assembly. 12. Corrosion resistant silver - 4. Vibration proof adjustment by plated side contact arms. means of double -screw stack. 13. Precision ground bakelite 6. Pressure plate on top of stack spacers for structural and dimen- keeps stack tight under tension sional stability. over wide ranges of temperature. 14. Steel ring, molded into shock 6. Extra flexible roped wire leads mount, centers and holds vibra- eliminate strain and weakening. tor upright when can is sealed. 7. Metal can, spun at bottom, 1S. Neoprene wafer in hermeti- seals vibrator against dust and dirt. cally sealed vibrators effectively it Plated piac acsure m.n.mox se.atsaihraror agnt mecpher :e contact resistance. pressure changes and moisture. Typical Synchronous Vibrator Construction NEU' LINE COVERS 97% OF ALL VIBRATOR REPLACEMENTS UNIVIBE -the complete 8-model vibra- Yes, Univibe is right at the top in tor line- covers the replacement needs quality. Well known "balanced reso- 1907-1947 of over 2500 auto radio models! Pro- nance" design, of extra heavy duty con- vides quick, easy replacement of worn struction, means 33% longer vibrator lije out vibrators in 182 makes of auto by actual test. radios, as old as 1936! Here is another money -making radio Think of it -97% service coverage parts line for National Union dealers. with only 8 fast- moving numbers -every For immediate delivery order Univibes one a repeat profit producer! today from your N.U. Distributor. NATIONAL UNION RADIO CORPORATION, NEWARK 2, N.J. NATIONAL UNION RADIOS, TUBES AND PARTS Radio Sets Phototubes Receiving Tubes Transmitting Tubes Special Purpose Tubes Cathode Roy Tubes Auto Vibroors Ponel lamps Flashlight Bulbs Ballasts Volume Controls Condensers Batteries RADIO -CRAFT for JANUARY, 1947 2 e "LL:-?"M_COMWlS . ... 'f[Sl4ian -Afterr,.. - CAPACITORS, Capacity Ve bee elves In the rating column an Id Ibfd. fer Electrolytic and Paper Capacitors, bnd Iñ tumid. let Mica and Ceramic Capelles. /LACEMENT DATA IDENOFIGTION COORS CORNELL. JU1wG !' TRUETONE MALLORY SOUR SPRAGUE AEROVOX AND DU'ILIER PMT Pk, PART No. PART W PMT No. PART No. INSTALLATION NOTis CAP. VOLT PART No. 40- ..100 .500256 . FP306 p7-401.20-130 EIr24 MUD UP3515 *Filter gUR 20 150 ;c2 400 502158 17429 8-0-2 TC-2 484-.2 DT4P2 Lfae ..Ioolatia8 9 400 ..502157 SP428 S-005 TC-15 484-.05 aT4S5 Line Filter .01 502151. TP421 TC-11 484 -.01 1754.51 Par. .Plata1 t; 004 .400 ¢02150 TP407 8-0.004 TC-24 484 -.004 Dr604 -'AU410 Coupllag What's your biggest headache when factured since January 1, 1946 -even PUBLICATION DATES: servicing radios? Identifying parts? W'h to the restringing of dial cords. They do SE No. 9 December 19 PHOTOFACT FOLDERS it's easy to locate this by means of pictures, full -page sat No. 10 December 29 and identify any item you want to schematics, original technical notes find. Just look at the Complete Parts help that you work faster, more accu- Cut this out and MAIL IT TO YOUR List . .. a list that's keyed to clear rately...easily increase the number of jobs DISTRIBUTOR. If you do not know chassis photographs and a full page, you can do in a week by fifty percent. his name and address, send it directly easy -to -read schematic diagram. For PHOTOFACT FOLDERS are sold in to Howard W. Sams & Co., Inc., 2924 East Washington instance, the capacitor listing alone sets of 40, each set covering new Street, Indianapolis 6, radios, Indiana, and we will see that your near- gives complete data on capacity, volt- phonographs, record changers, intercom- est distributor gets it. In Canada- age rating, function, replacement types munication systems, recorders and power write to A. C. SIMMONDS & SONS, - , , even includes installation notes. amplifiers within a short time after 301 King Street East, Toronto, Ontario. Canadian Price No service problem can stump they reach the market. Their cost is $1.75. you when you use PHOTOFACT only $1.50 a set, including membership PLEASE PRINT FOLDERS. They result from the actual in the Howard W. Sams Institute. examination of the receiver involved, No other radio service compares with and are not EJSend Set No.10 J Send Set No.9 copied from the manufac- PHOTOFACT FOLDERS in completeness, turer's service (Circle one or more of following) Send data or from looking at accuracy or timeliness.
Load more

Recommended publications
  • Reassessing the Standard of Living in the Soviet Union: an Analysis Using Archival and Anthropometric Data
    IZA DP No. 1958 Reassessing the Standard of Living in the Soviet Union: An Analysis Using Archival and Anthropometric Data Elizabeth Brainerd DISCUSSION PAPER SERIES DISCUSSION PAPER January 2006 Forschungsinstitut zur Zukunft der Arbeit Institute for the Study of Labor Reassessing the Standard of Living in the Soviet Union: An Analysis Using Archival and Anthropometric Data Elizabeth Brainerd Williams College, CEPR, WDI and IZA Bonn Discussion Paper No. 1958 January 2006 IZA P.O. Box 7240 53072 Bonn Germany Phone: +49-228-3894-0 Fax: +49-228-3894-180 Email: [email protected] Any opinions expressed here are those of the author(s) and not those of the institute. Research disseminated by IZA may include views on policy, but the institute itself takes no institutional policy positions. The Institute for the Study of Labor (IZA) in Bonn is a local and virtual international research center and a place of communication between science, politics and business. IZA is an independent nonprofit company supported by Deutsche Post World Net. The center is associated with the University of Bonn and offers a stimulating research environment through its research networks, research support, and visitors and doctoral programs. IZA engages in (i) original and internationally competitive research in all fields of labor economics, (ii) development of policy concepts, and (iii) dissemination of research results and concepts to the interested public. IZA Discussion Papers often represent preliminary work and are circulated to encourage discussion. Citation of such a paper should account for its provisional character. A revised version may be available directly from the author. IZA Discussion Paper No.
    [Show full text]
  • P1-Extreme Amplifier by David Sorlien, Revised and Updated by Stephen Keller
    Introduction to Tube Amplifier Theory: 10.02.15 Featuring the AX84 P1-eXtreme Amplifier by David Sorlien, revised and updated by Stephen Keller The P1-eX amplifier is a simple three-stage vacuum tube electric guitar amplifier. As outlined in Fig. 1, it consists of two preamp stages driving a power amp stage. Depending on the choice of output tube, this amp is can deliver between 7 and 15 watts into a 4-, 8-, or 16-ohm load. Fig. 1: P1-eX block diagram Placed between the two preamp stages is a preamp volume control. In a similar manner, the bass, middle, and treble tone controls and a master volume control are placed between the preamp and the final power amp stage. The guitar amplifier performs two primary functions: One, it amplifies the small voltages and currents produced by the guitar pickup into a signal powerful enough to drive a speaker. Two, it shapes the frequency response, tonality, and distortion characteristics of the raw guitar signal into a form pleasing to the musician. To better grasp how a guitar amplifier accomplishes these functions, let©s take a walk through the inner workings of the AX84 P1-eXtreme amp (P1-eX). For reference, there is copy of revision 06.03.16 of the schematic provided in Appendix 1 at the end of this document. To fully understand how a guitar amp works, even a simple one like the P1-eX, you must know how to read schematic diagrams, and understand what things like resistors and capacitors are. You also need some knowledge of basic algebra and electronic theory.
    [Show full text]
  • The Beginner's Handbook of Amateur Radio
    FM_Laster 9/25/01 12:46 PM Page i THE BEGINNER’S HANDBOOK OF AMATEUR RADIO This page intentionally left blank. FM_Laster 9/25/01 12:46 PM Page iii THE BEGINNER’S HANDBOOK OF AMATEUR RADIO Clay Laster, W5ZPV FOURTH EDITION McGraw-Hill New York San Francisco Washington, D.C. Auckland Bogotá Caracas Lisbon London Madrid Mexico City Milan Montreal New Delhi San Juan Singapore Sydney Tokyo Toronto McGraw-Hill abc Copyright © 2001 by The McGraw-Hill Companies. All rights reserved. Manufactured in the United States of America. Except as per- mitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written permission of the publisher. 0-07-139550-4 The material in this eBook also appears in the print version of this title: 0-07-136187-1. All trademarks are trademarks of their respective owners. Rather than put a trademark symbol after every occurrence of a trade- marked name, we use names in an editorial fashion only, and to the benefit of the trademark owner, with no intention of infringe- ment of the trademark. Where such designations appear in this book, they have been printed with initial caps. McGraw-Hill eBooks are available at special quantity discounts to use as premiums and sales promotions, or for use in corporate training programs. For more information, please contact George Hoare, Special Sales, at [email protected] or (212) 904-4069. TERMS OF USE This is a copyrighted work and The McGraw-Hill Companies, Inc.
    [Show full text]
  • 6\ M?L/ K7 Gmwy 4 I ' + /‘4 I- E 7 4-‘1 :"I'yl’‘‘‘‘ ‘N I ‘ 7'0 LP 2: J- = ' '
    Oct.’ 8, 1940. s. HUNT £2,217,277 ' ‘ DEGENERATIVE PLATE cmcun: DETECTOR Filed Sept. '28, 19:8 DEGENERAT/VE PLATE __———_C/RCU/T DETECTOR | /2 6\ M?l/ k7 gmwy 4 i ' + /‘4 i- E 7 4-‘1 :"I'Yl’‘‘‘‘ ‘n I ‘ 7'0 LP 2: J- = ' ' a . °~ I ?|__' I ~ 70 A. E AMPLIFIER INVENTOR. Ilse MOUR HUNT BY ATTORNEY. Patented Oct. 8, 1940 2,2l7,277 UNITED STATES F ICE 2,217,277 DEGENERAT'IVE PLATE CIRCUIT DETECTOR Seymour Hunt, Jackson Heights, Long llsland, N. Y., assignor to Radio Corporation of Amer ica, a corporation of Delaware Application September 28, 1938, Serial No. 232,075 6 Claims. (Cl. 256-4237) My present invention relates to detector cir art are fully acquainted with the construction of cuits, and more particularly to degenerative plate superheterodyne receivers, it is not believed nec circuit detectors capable of substantially ampli essary to explain the construction thereof at any fying the audio voltage output thereof. greater length. The output electrode for the 5 One of the main objects of this invention is to detector circuit includes electrode 4. Preferably, provide a detector of the in?nite impedance type this electrode is a wound grid. The latter is con which includes an electronic section having a nected through load resistor 52 to the plus B negative mutual conductance characteristic terminal of any desired direct current source, which functions to amplify the audio output of such as the usual direct current energizing source 10 the detector. of a radio receiver. The coupling condenser l3 Another important object is to provide in a transmits the audio voltage, in ampli?ed form, biased plate circuit detector of the degenerative to the following audio ampli?er for ?nal repro type a negative mutual conductance section duction.
    [Show full text]
  • Electrostatic Design and Characterization of a 200 Kev Photogun and Wien Spin Rotator
    Old Dominion University ODU Digital Commons Electrical & Computer Engineering Theses & Dissertations Electrical & Computer Engineering Spring 2021 Electrostatic Design and Characterization of a 200 keV Photogun and Wien Spin Rotator Gabriel G. Palacios Serrano Old Dominion University, [email protected] Follow this and additional works at: https://digitalcommons.odu.edu/ece_etds Part of the Computer Engineering Commons, Electrical and Computer Engineering Commons, and the Physics Commons Recommended Citation Palacios Serrano, Gabriel G.. "Electrostatic Design and Characterization of a 200 keV Photogun and Wien Spin Rotator" (2021). Doctor of Philosophy (PhD), Dissertation, Electrical & Computer Engineering, Old Dominion University, DOI: 10.25777/mf9f-r453 https://digitalcommons.odu.edu/ece_etds/224 This Dissertation is brought to you for free and open access by the Electrical & Computer Engineering at ODU Digital Commons. It has been accepted for inclusion in Electrical & Computer Engineering Theses & Dissertations by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. ELECTROSTATIC DESIGN AND CHARACTERIZATION OF A 200 keV PHOTOGUN AND WIEN SPIN ROTATOR by Gabriel G. Palacios Serrano B.S. August 2014, Universidad Autónoma Metropolitana, Mexico M.S. May 2017, Old Dominion University A Dissertation Submitted to the Faculty of Old Dominion University in Partial Fulfillment of the Requirements for the Degree of DOCTOR OF PHILOSOPHY ELECTRICAL AND COMPUTER ENGINEERING OLD DOMINION UNIVERSITY May 2021 Approved by: Helmut Baumgart (Director) Carlos Hernández (Member) Linda Vahala (Member) Mohammad Obeid (Member) Gon Namkoong (Member) ABSTRACT ELECTROSTATIC DESIGN AND CHARACTERIZATION OF A 200 keV PHOTOGUN AND WIEN SPIN ROTATOR Gabriel G. Palacios Serrano Old Dominion University, 2021 Director: Dr.
    [Show full text]
  • Cre|4|L-Feuhis ATTORNEYS Nov
    Nov. 28, 1961 M. V. SULLIVAN 3,011,018 HIGHLIGHT APERTURE CORRECTION SYSTEM Filed Sept. 26, 1956 3 Sheets-Sheet 1 NVENTOR MICHAEL V.SULL VAN cre|4|l-feuHIS ATTORNEYS Nov. 28, 1961 M. W. SULLIVAN 3,011,018 HIGHLIGHT APERTURE CORRECTION SYSTEM Filed Sept. 26, 1956 3 Sheets-Sheet 2 aa- ?-s? ? O ???? S I INVENTOR MICHAEL V. SULLIVAN -a?.--77. ? ????? ??? HIS AT TORNEYS Nov. 28, 1961 M. V. SULLIVAN 3,011,018 HIGHLIGHT APERTURE CORRECTION SYSTEM Filed Sept. 26, 1956 3 Sheets-Sheet 3 NVENTOR MiCHAEL V. SULLIVAN Y Cit...!!* His A ?????? la? 3,011,018 United States Patent Office Patented Nov. 28, 1961 3,011,018 FIG. 2 illustrates the waveform of the television pic HIGHLIGHT APERTURE CORRECTION SYSTEM ture signal at various points in the aperture equalization Michael V. Sullivan, Florham Park, N.J., assignor to system shown in FIG. 1; Columbia Broadcasting System, Inc., New York, N.Y., FIG. 3 is a circuit diagram of the input and white a corporation of New York clipper portions of the system shown in FIG. 1; Filed Sept. 26, 1956, Ser. No. 612,221 FIG. 4 is ? circuit diagram of the difference ampli 7 Claims. (Cl. 178-6) fier portion of the system shown in FIG. 1; and FIG. 5 is a circuit diagram of the summing amplifier This invention relates to television, and more particu and output portions of the system shown in FIG.1. larly to a new and improved aperture equalization O Referring first to the block diagram of FIG. 1 and method and means for correcting aperture distortion in the graphic representations of the signal waveform of the highlight regions of the television picture, without FIG.2, a television picture information signal as illus increasing the high frequency noise which is inherent in trated in FIG.
    [Show full text]
  • BY 7% É Arrórney Patent-Ed Nov
    Nov. 24, 1942. s. HUNT 2,302,867 COMÈINED MIXER AND INTERMEDIATE FREQUENCY STAGE l Filed Oct. 25, 1941 Q/ T - l INVENToR ’ SEYMOUR BY 7% é ArróRNEY Patent-ed Nov. 24, 1942 2,302,867 . UNITED STATES PATENT OFFICE tratas@r COMBINED MIXER AND INTÉRMEDIATE FREQUENCY STAGE Seymour Hunt, Flushing, N. Y., assîgnor to Radio Corporation of America, a corporation of Dela Ware Application october 25, 1941, serial No. 416,438 8 Claims. (>Cl. 250-20) This invention is concerned with an improve ` accelerate the electron stream and to shield elec ment in radio receivers of the superheterodyne trostatically the signal control grid G4 from volt type and more particularly with a combined first age fluctuations on the oscillator anode-grid G2 detector-oscillator or mixer and intermediate fre and the output anode P. quency stage that may be used with advantage in Cl According to my invention the functions of such receivers. the several electrodes and the connections there In the present state of the art it isknown to tol of the circuit elements are modified somewhat use in superheterodyne circuits a multi-electrode ~ as will now be pointed out more particularly. In type of tube designed to perform simultaneously the circuit of Fig. 1 the grid G1 serves as the the functions of a mixer tube and of an oscillator signal control grid as well as the oscillator grid. tube. According to my present invention the ` Connected between the signal grid G1 and cath same or equivalent multi-electrode tube is made ode 'is the circuit L1-C1 which is tuned to the to perform in addition the function of interme received signal oscillations.
    [Show full text]
  • AWAR Volume 24.Indb
    THE AWA REVIEW Volume 24 2011 Published by THE ANTIQUE WIRELESS ASSOCIATION PO Box 421, Bloomfi eld, NY 14469-0421 http://www.antiquewireless.org i Devoted to research and documentation of the history of wireless communications. Antique Wireless Association P.O. Box 421 Bloomfi eld, New York 14469-0421 Founded 1952, Chartered as a non-profi t corporation by the State of New York. http://www.antiquewireless.org THE A.W.A. REVIEW EDITOR Robert P. Murray, Ph.D. Vancouver, BC, Canada ASSOCIATE EDITORS Erich Brueschke, BSEE, MD, KC9ACE David Bart, BA, MBA, KB9YPD FORMER EDITORS Robert M. Morris W2LV, (silent key) William B. Fizette, Ph.D., W2GDB Ludwell A. Sibley, KB2EVN Thomas B. Perera, Ph.D., W1TP Brian C. Belanger, Ph.D. OFFICERS OF THE ANTIQUE WIRELESS ASSOCIATION DIRECTOR: Tom Peterson, Jr. DEPUTY DIRECTOR: Robert Hobday, N2EVG SECRETARY: Dr. William Hopkins, AA2YV TREASURER: Stan Avery, WM3D AWA MUSEUM CURATOR: Bruce Roloson W2BDR 2011 by the Antique Wireless Association ISBN 0-9741994-8-6 Cover image is of Ms. Kathleen Parkin of San Rafael, California, shown as the cover-girl of the Electrical Experimenter, October 1916. She held both a commercial and an amateur license at 16 years of age. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the copyright owner. Printed in Canada by Friesens Corporation Altona, MB ii Table of Contents Volume 24, 2011 Foreword ....................................................................... iv The History of Japanese Radio (1925 - 1945) Tadanobu Okabe .................................................................1 Henry Clifford - Telegraph Engineer and Artist Bill Burns ......................................................................
    [Show full text]
  • Sources of Radio Information (Replaces Letter Circular 513)
    JHDtANK Letter 1-6 Circular LC 57^ U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS WASHINGTON Sources of Radio Information December 16, 1939 I . JHDsANK DEPARTMENT OF COMMERCE Letter 1-6 NATIONAL BUREAU OF STANDARDS Circular WASHINGTON LC-573 (Replaces Letter Circular 513) Revised to Dec. 16, 1939) SOURCES OF RADIO INFORMATION Contents 1. Periodicals, 2. Books. 3. U . S. Government radio publications. 4. Publications of the International Bureau of the Telecommunication Union, Berne, Switzerland. 5. Radio laws and regulations. 6. Safety rules. 1. Perlddicals . The following is a partial list of periodicals, largely devoted to radio. They are monthly, except where otherwise stated. A num- ber of electrical and general magazines also publish considerable radio information. A classified list of the articles of radio engineering inter- est appearing in periodicals is published each month in the Wireles Engineer, a British magazine listed below. A short abstract of each article Is given. Information on Government radio publications is given in Sections 3 and 5 below, a.. American Periodicals. Bell System Technical Journal. Published by American Telephone and Telegraph Co., 195 Broadway, New York, N.Y. (Technical) ( Quarterly) Communications. Bryan Davis Publishing Co., Inc,, 19 E. 4-7 th St., New York, N.Y, (Technical). , , LC573 —12/16/39. 2 . Electrical Communication, International Standard Electric Corp. 67 Broad Street, New York, N.Y. (Technical). ^ • ^nd St., Electronics. McGraw-Hill Publishing Co. , Inc., 33^ New York, N.Y. (Technical). General Radio Experiment 37 '. -Published by General Radio uO, 30 State Street, Cambridge, Mass. (Trade, technical). Philips Technical Review, Fhilips Technical Products, Inc., 4-19 Fourth Ave., New York, N.Y.
    [Show full text]
  • If You Have Adobe Acrobat Reader Installed Click Here for the April
    PAGE 1 VOLUME # 44 NUMBER 2 SPARK-GAP TIMES APRIL 2007 Published quarterly - January-April-July-October 3191 DARVANY DR. DALLAS TX 75220-1611 U. S. A. E-mail [email protected] http://www.ootc.us Spark-Gap Times, the official publication of the Old Old Timers Club, 3191 Darvany Dr. Dallas TX75220-1611. Editor, Bert Wells, W5JNK. Ph:214-352-4743 [email protected] PAGE 2 VOLUME # 44 NUMBER 2 SPARK-GAP TIMES APRIL 2007 WE HONOR THESE NEW MEMBERS OF OOTC NAME CALL # REFERRAL, SPONSOR ELMER RICHARD "DICK" NIELSEN K5RN 4452 BOB IRISH K5ZOL #3872 RANDY K. MURRAY W3LF 4453 SECRETARY EARL SWEENEY K4LSB 4454 RONALD TOLLER N4US #3443 GARY L. DOUGLAS KD5VJC 4455 SECRETARY KLAUS-DIETER HANSCHMANN DL8MTG 4456 GÜNTER PESCH DJ2XB #3384 THOMAS D. "TJ" JENKINS WA8VDC 4457 MORT BARDFIELD, W1UQ #3027 ALLAN H. KAPLAN W1AEL 4458 TIMOTHY BRATTON K5RA #4414 ALAN H. NIELSEN K2GRO 4459 SECRETARY R. DAVID "DAVE" FLESH W6IBF 4460 JOE SAUGIER, K6CD #2842 DOUGLAS N. "D-BAR" MARTIN VE3SJE 4461 SECRETARY ROBERT H "BOB" NICHOLAS JR. K5HLZ 4462 W5AJX, DON ZELENKA #3897 ROBERT M. "BOB" ROSIE W7GSV 4463 SECRETARY GORDON L. JONES W5OU 4464 MORT BARDFIELD, W1UQ #3027 ALLEN S "AL" OLDFIELD W9KXI 4465 SECRETARY JOHN K. SHORB W3FSA 4466 SECRETARY DAVID P. "DAVE" BATES W2HLI 4467 SECRETARY Were you licensed at least 25 years ago and licensed now? Then you should belong to the Quarter Century Wireless Association. QCWA PO BOX 3247 FRAMINGHAM MA 01705 PAGE 3 VOLUME # 44 NUMBER 2 SPARK-GAP TIMES APRIL 2007 OOTC OFFICERS CONTENTS PRESIDENT Troy L.
    [Show full text]
  • High-Seas Fisheries of the U.S.S.R
    HIGH-SEAS FISHERIES OF THE U.S.S.R. UNHED STATES DEPARTMENT OF THE INTERIOR FISH AND WILDLI FE SERVICE BUREAU OF COMMERCIAL FISHERIES WASHINGTON 2S , D.C. FISHERY LEAFLET 482 C 0 V E R VIEW OF FACTORY- TRAWLER PUSHKIN. T HE VESSEL IS EQUI P PED fOR STE RN TRA Wll ,C AN HAUL UP TO 10 TONS Of f i SH ABOARD THROUGH THE STERN SllPWAY , AND CAN fREE ZE AND PACKAGE THE fiSH AT SEA. UNITED STATES DEPARTMENT OF THE INTERIOR, FRED A. SEATON, SECRETARY FISH AND WILDLIFE SERVICE , ARNIE J. SUOMELA, COMMISSIONER BUREAU OF COMMERCIAL FISHERIES, DONALD L. McKERNAN, DIRECTOR HIGH-SEAS FISHERIE S OF THE U.S.S.R. BY MORTON J. GARFIELD COMMODITY-INDUSTR Y ANALYST BRANCH OF SPECIAL REPORTS DIVISION OF INDUSTRIAL RESEARCH AND SERVICES F I SHERY LEAFLET 482 WASHI NGTON 25) D.C . MAR CH 1959 IT I GII-SE,'\S FTIJID111h3 OF TIT:: u.s.s.n. Contents P ec Status and trends •••••••• •••••• . · · . 1 Principal hir,h-scas fisherios •••••••••••· . 4 Arctic- and F-a ltic-based operations . 4 Ca tch and principal species • • • • • • • • • • • • • • 4 Fishing ports • • • • • • • • • • . · . · . 7 Far Eastern-based operations ••••• • • · . • • • 7 FishinG vessels and equipment •••••••••• •• •• • • 10 Foreien trade ••••••••••••••• · . · . 13 International activities and research • • • • • • • • • • • 15 \Vha ling .... ...... · . 16 List of principal sources ••• • •••••••••••· • 17 Tables Table l.--Catch of fish and shellfish, by selected species, 1948 and 1953-56 Table 2.--:Ha rine landines at Arctic and Baltic ports, by f i shing ar eas , 1956 Table 3.--Number and type of fishing craft, 1940, 1948, 1953- 56 Table 4.--Imports of fishery products by principal countries of origin, 1955-57 Table 5.
    [Show full text]
  • Amplifier Radio Frequency Am-1881/U
    TM 11-6625-353-35 D E PAR T M E N T O F T H E A R M Y T E C H N I C A L M A N U A L FIELD AND DEPOT MAINTENANCE MANUAL AMPLIFIER RADIO FREQUENCY AM-1881/U HEADQUARTERS, DEPARTMENT OF THE ARMY 17 FEBRUAY 1961 WARNING DANGEROUS VOLTAGES EXIST IN THIS EQUIPMENT Be careful when working on the 115-volt (or 230-volt if used) ac line connections and on the 390-volt plate and power supply circuits. Serious injury or death may re- sult from contact with these points. DON’T TAKE CHANCES ! This equipment contains a selenium rectifier. When selenium rectifiers fail because of burnout or arc-over, poisonous fumes and compounds are released. The fumes have a strong odor and should not be inhaled. Provide adequate ventilation immediately and do not handle the rectifier until it has cooled. TM 11-6625-353-35 TECHNICAL MANUAL HEADQUARTERS NO. 11-6625-353-35 DEPARTMENT OF THE ARMY Washington 25, D. C. 17 February 1961 AMPLIFIER, RADIO FREQUENCY AM-188/U Paragraph Page CHAPTER 1. THEORY Scope . 1 2 Block diagram . 2 2 Stage analysis . 3 2 CHAPTER 2. TROUBLESHOOTING Section I. General troubleshooting techniques General instructions . 4 7 Organization of troubleshooting procedures . 5 7 Test equipment required . 6 8 II. Troubleshooting Amplifier, Radio Frequency AM–1881/U Checking filament and B circuits for shorts . 7 8 Test setup . 8 9 Localizing troubles . 9 9 Stage-gain measurements . 10 11 Dc resistances of transformer T1 . 11 14 III. Repairs and adjustments General parts replacement techniques .
    [Show full text]