TM 11-6625-274-12 DEPARTMENT OF THE ARMY TECHNICAL MANUAL

OPERATOR’S AND ORGANIZATIONAL

MAINTENANCE MANUAL

TEST SETS, ELECTRON TUBE TV-7/U,

TV-7A/U, TV-7B/U AND TV-7D/U

This copy is a reprint which includes current pages front Charges 6 and 7.

HEADQUARTERS, DEPARTMENT OF THE ARMY

14 JUNE 1960 WARNING

Be careful not to contact high-voltage connections or the 115-volt ac input connections when replacing tubes in the test set. Voltages up to 300 volts ac may be encountered in this equipment. Serious injury or death may result from contact with these connections.

DON’T TAKE CHANCES! Changes in force: C6 and C7 TM 11-6625-274-12 *C7

CHANGE HEADQUARTERS DEPARTMENT OF THE ARMY NO. 7 Washington, DC, 9 January 1984

OPERATOR’S AND ORGANIZATIONAL MAINTENANCE

MANUAL TEST SETS, ELECTRON TUBE

TV-7/U (NSN 6625-00-376-4939),

TV-7A/U (NSN 6625-00-376-4939),

TV-7B/U (NSN 6625-00-376-4939),

AND

TV-7D/U (NSN 6625-00-820-0064)

TM 11-6625-274-12, 14 June 1960, is changed direct to: Commander, US Army Communi- as follows: cations-Electronics Command and Fort Mon- Page 7. Delete paragraphs 1.1, 2, and 2.1 and mouth, ATTN: DRSEL-ME-MP, Fort Mon- substitute: Mouth, New Jersey 07703. In either case, a reply will be furnished direct to you. 1.1. Consolidated Index of Army Publications and Blank Forms Paragraphs 2.2, 2.3 and 2.4 are added after paragraph 2.1. Refer to the latest issue of DA Pam 310-1 to determine whether there are new editions, 2.2. Reporting Equipment improvement changes or additional publications pertaining to Recommendations (ElR) the equipment. If your electron tube test set needs improvement, 2. Maintenance Forms, Records, and Reports let us know. Send us an EIR. You, the user, are a. Reports of Maintenance and Unsatisfactory the only one who can tell us what you don’t like Equipment. Department of the Army forms and about your equipment. Let us know why you procedures used for equipment maintenance will don’t like the design. Put it on an SF 368 (Quality Deficiency Report). Mail it to Com- be those prescribed by TM 38-750, The Army mander, US Army Communications-Electronics Maintenance Management System. Command and Fort Monmouth, ATTN: b. Report of Packaging and Handling Defici- DRSEL-ME-MP, Fort Monmouth, New Jersey encies. Fill out and forward SF 364 (Report of 07703. We’ll send you a reply. Discrepancy (ROD)) and prescribed in AR 2.3. Administrative Storage 735-11-2/DLAR 4140.55/NAVMATINST 4355. 73A/AFR 400-54/MCO 4430.3F. Administrative Storage of equipment issued to and used by Army activities will have preventive c. Discrepancy in Shipment Report (DISREP) maintenance performed in accordance with the (SF 361). Fill out and forward Discrepancy in PMCS charts before storing. When removing the Shipment Report (DISREP) (SF 361) as pre- equipment from administrative storage the scribed in AR 55-38/NAVSUPINST 4610.33C/ PMCS should be performed to assure operational AFR 75-18/MCO P4610.19D/DLAR 4500.15. readiness. Disassembly and repacking of equip- 2.1. Reporting Errors and Recommending ment for shipment or limited storage are covered Improvements in chapter 4 and TM 740-90-1. You can help improve this manual. If you find 2.4. Destruction of Army Electronics Materiel any mistakes or if you know of a way to im- Destruction of Army electronics materiel to pre- prove the procedures, please let us know. Mail vent enemy use shall be in accordance with TM your letter or DA Form 2028 (Recommended 750-244-2. Changes to Publications and Blank Forms)

*This change supersedes C2, 30 Jan 1963; C4, 22 June 1966 and C5, 30 April 1974. 1 C7, TM 11-6625-274-12 Page 8. Add paragraph 5.1 after paragraph 5. 5.1. Items Comprising an Operable Equipment

Usable NSN QTY Nomenclature, part No., and mfr code on code Fig. No.

6625-00-376-4939 Test Set, Electron Tube TV-7/U, TV-7A, B/U: 1,2,3 dynamic mutual conductance type; 0.6 to 117 V fil voltage range meter indication; tube condition on 0 to 120 arbi- trary scale; operating power requirements AC, 105 to 125 V, 50 to 1000 Hz single phase; SW positions A thru E; portable type 6625-00-820-0064 Test Set, Electron Tube TV-7D/U: dynamic mutual conduc- tance type; 0.6 to 117 V fil voltage range; meter indication; tube condition on 0 to 120 arbitrary scale; operating power requirements AC, 105 to 125 V, 50 to 1000 Hz single Phase; SW position A thru F, portable type consisting of: NOTE The part number is followed by the applicable 5-digit Federal supply code for manufacturers (FSCM) iden- tified in SB 708-42 and used to identify manufacturer, distributor, or Government agency, etc. NOTE In usable on code column, number 1 refers to TV-7/U; number 2 refers to TV-7A/U; number 3 refers to TV- 7B/U; number 4 refers to TV-7D/U. 5935-00-732-1919 1 Adapter, Electron Tube Socket: SM-B-425536; 80063 1,2,3,4 8 5935-00-537-4056 1 Adapter, Electron Tube Socket: SM-C-179260; 80063 1,2,3,4 8 5935-00-305-1189 1 Adapter, Electron Tube Socket: SM-B-425538; 80063 1,2,3,4 8 6625-00-684-1189 1 Adapter, Test: SM-B-425638; 80063 1,2,3,4 4 6625-00-618-9928 1 Adapter, Test: SM-B-425639; 80063 1,2,3,4 4 6625-00-618-9929 1 Adapter, Test: SM-B-425640; 80063 1,2,3,4 4 5935-00-808-1802 1 Adapter, Electronic Tube Socket: nuvistor tube socket 1,2,3,4 adapter; 1050-127; 28569 6625-00-069-1960 1 Adapter, Test: socket for GE Micro-Miniature 7077 and 1,2,3,4 7486; 86-060; 04435 6625-00-668-4683 2 Lead, Test: 12450-245; 28569 1,2,3 4 6625-00-727-7065 2 Lead, Test: SM-B-425548; 80063 4 4

Page 17, paragraph 18c. Delete the note. down to 10, turn the BIAS control knob to full scale (100 on dial). Page 18, paragraph 21d note. Change the note to read: Page 22, chapter 3 heading. After the heading add: NOTE If the meter pointer cannot be adjusted

Section I. OPERATOR/CREW PREVENTIVE MAINTENANCE CHECKS AND SERVICES Delete paragraphs 31, 32, 33 and figures 11 and equipment other than those issued with the 12 and substitute: equipment.

31. Scope of Operator’s Maintenance a. Preventive maintenance checks and services chart (par. 33.1). The maintenance duties assigned to the operator of Test Sets, Electron Tube TV-7/U, TV-7A/U, b. Visual inspection (par. 34). TV-7B/U, and TV-7D/U are listed below to- C . Tube replacement (par. 37). gether with a reference to the paragraph cover- d. Replacement of lamps (par. 39). ing the specific maintenance function. The duties assigned do not require tools or test 2 C7, TM 11-6625-274-12 32. General avoided. When necessary, use gloves which the solvent cannot penetrate. If NOTE the solvent is taken internally, consult Refer to TM 750-244-2 for proper pro- a physician immediately. cedures for destruction of this equip- ment to prevent enemy use. Compressed air is dangerous and can cause serious bodily harm if protective a. Operator/crew preventive maintenance is means or methods are not observed to the systematic care, servicing and inspection of prevent a chip or particle (of whatever equipment to prevent the occurrence of trouble, size) from being blown into the eyes or to reduce downtime, and to maintain equipment unbroken skin of the operator or other in serviceable condition. To be sure that your personnel. Goggles must be worn at all electron tube test set is always ready for your times while cleaning with compressed mission, you must do scheduled preventive air. Compressed air shall not be used maintenance checks and services (PMCS). for cleaning purposes except where (1) BEFORE OPERATION, perform your B reduced to less than 29 pounds per PMCS to be sure that your equipment is ready square inch gage (psig) and then only to go. with effective chip guarding and per- (2) When an item of equipment is reinstalled sonnel protective equipment. Do not after removal, for any reason, perform the use compressed air to dry parts when necessary B PMCS to be sure the item meets the trichlorotrifluoroethane has been used. readiness reporting criteria. (3) Use the ITEM NO. column in the PMCS NOTES

table to get the number to be used in the TM The PROCEDURES column in your ITEM NO. column on DA Form 2404 (Equip- PMCS charts instruct how to perform ment Inspection and Maintenance Worksheet) the required checks and services. Care- when you fill out the form. fully follow these instructions and, if b. Routine checks like CLEANING, DUST- tools are needed or the chart so in- ING, WASHING, CHECKING FOR FRAYED structs, get organizational maintenance CABLES, STOWING ITEMS NOT IN USE, to do the necessary work. COVERING UNUSED RECEPTACLES, If your equipment must be in operation CHECKING FOR LOOSE NUTS AND BOLTS all the time, check those items that can AND CHECKING FOR COMPLETENESS are be checked and serviced without dis- not listed as PMCS checks. They are things that turbing operation. Make the complete you should do any time you see they must be checks and services when the equipment done. If you find a routine check like one of can be shut down. operators reported problems with this item. c. Deficiencies that cannot be corrected must NOTE be reported to higher category maintenance When you are doing any PMCS or personnel. Records and reports of preventive routine checks, keep in mind the warn- maintenance must be made in accordance with ings and cautions. procedures given in TM 38-750. WARNINGS 33. Operator/Crew Preventive Maintenance Checks and Services Adequate ventilation should be provided while using TRICHLOROTRIFLUORO- Perform before operation PMCS if you are ETHANE. Prolonged breathing of vapor operating the item for the first time. should be avoided. The solvent should NOTE not be used near heat or open flame; the The checks in the interval column are to products of decomposition are toxic and be performed in the order listed. irritating. Since TRICHLOROTRI- FLUOROETHANE dissolves natural oils, Page 23. Add paragraph 33.1 after paragraph 33. prolonged contact with skin should be 3 C7, TM 11-6625-274-12 33.1. Operator/Crew Preventive Maintenance Checks and Services Chart

B-Before Interval Procedures - Check for and have Equipment is not Item Item to be repaired or adjusted as Ready/Available No. B Inspected necessary If:

1 * Mission Check for completeness and Available equipment Essential satisfactory condition is insufficient to Equipment of the equipment. Report support the combat missing items. mission

2 TV-7(*)/U Accomplish starting procedure Test Set as described in paragraph 17.

*This check to be performed prior to redeployment or prior to reissue after repair or overhaul.

Add Section II and paragraphs 33.2 and 33.3 after paragraph 33.1 as follows:

Section II. ORGANIZATIONAL PREVENTIVE MAINTENANCE CHECKS AND SERVICES 33.2. Organizational Maintenance checks and services, described in paragraph 33.3

Organizational preventive maintenance proce- outline inspections that are to be made at dures are designed to help maintain equipment specific monthly (M) intervals. in serviceable condition. They include items to 33.3. Organizational Preventive Maintenance be checked and how to check them. These Checks and Services Chart

M-Monthly Interval Item Item to be No. M Inspected Procedures

1 TV-7(*)/U Accomplish performance Test Set check as described in paragraph 35.

Page 30. Change title of chapter 4 to “SHIP- Page 32. Delete section II in its entirety. MENT AND LIMITED STORAGE”. Page 33. Delete appendix I and substitute:

APPENDIX I

REFERENCES

The following is a list of applicable references available to the operator or organizational main- tenance personnel of Test Set, Electron Tube TV-7(*)/U.

DA Pam 310-1 Consolidated Index of Army Publication and Blank Forms.

SB 38-100 Preservation, Packaging, Packing and Marking Materials, Supplies and Equipment Used by the Army.

TM 11-6625-274-24P Organizational, Direct Support and General Support Maintenance Repair Parts and Special Tools Lists (Including Depot Maintenance 4 C7, TM 11-6625-274-12 Repair Parts and Special Tools) for Test Sets, Electron Tube TV- 7A/U. (NSN 6625-00-376-4939), TV-7B/U (6625-00-376-4939) and TV-7D/U (6625-00-820-0064).

TM 38-750 The Army Maintenance Management System (TAMMS).

TM 740-90-1 Administrative Storage of Equipment,

TM 750-244-2 Procedures for Destruction of Electronics Materiel to Prevent Enemy Use.

Page 34. Appendix II deleted.

5 By Order of the Secretary of the Army:

JOHN A. WICKHAM JR. General, United States Army Official: Chief of Staff

ROBERT M. JOYCE Major General, United States Army The Adjutant General

DISTRIBUTION:

To be distributed in accordance with DA Form 12-36B, Operator and Crew Maintenance requirements for TV-7A-D/U.

SECTION II MAlNTENANCE ALLOCATION CHART FOR TEST SETS ELECTRON TUBE TV-7/U, TV-7A/U, TV-7B/U AND TV-7D/U

(4) (1) (2) (3) MAINTENANCE CATEGORY (5) (6) GROUP COMPONENT/ASSEMBLY MAINTENANCE TOOLS REMARKS NUMBER FUNCTION C O F H D AND EQPT.

00 TUBE TESTER TV-7U Service 0.5 2, 11, 13 TV-7A/U Test 0.5 1, 4, 14-18 TV-7B/U Calibrate 1.5 1-10 TV-7D/U Repair 0.5 A Repair 3.0 1-10, 12 SECTION III TOOL AND TEST EQUIPMENT REQUIREMENTS FOR TEST SET ELECTRON TUBE TV-7/U, TV-7A/U, TV-7B/U AND TV-7D/U

COLOR TEST MAINTENANCE NOMENCLATURE NATIONAL/NATO EQUIPMENT CATEGORY STOCK NUMBER TOOL NUMBER REF CODE 1 HD TUBE SOCKET ADAPTER MX-1258/U 6625-00-301-0815 2 HD *VOLTMETER ME-459/U 6625-00-229-0457 3 HD VARIABLE TRANSFORMER CN-16/U 5950-00-235-2086 4 HD MULTI METER TS-352 (*)/U 6625-00-242-5023 5 HD RESISTOR FIXED (10,000 OHMS) 5905-00-117-4194 6 HD ISOLATION TRANSFORMER 5950-00-498-2146 7 HD DECADE RESISTOR ZM-16/U 6625-00-669-0266 8 HD RESISTOR FIXED (12,000 OHMS) 5905-00-107-5148 9 HD RESISTOR FIXED (100,000 OHMS) 5905-00-120-0894 10 HD RESISTOR FIXED (375,000 OHMS) 11 HD RESISTOR FIXED (510,000 0HMS) 5905-00-279-2516 12 HD LIGHT ASSEMBLY MX-1292 6695-00-378-5449 13 H TOOL KIT ELECTRONIC EQUIPMENT TK-1OO 5180-00-605-0079 14 D ELECTRON TUBE OC3 5960-00-864-7516 15 D ELECTRON TUBE 5Y3 5960-00-262-0218 16 D ELECTRON TUBE 6AU6 5960-00-169-9346 17 D ELECTRON TUBE 6L6 5960-00-228-0054 18 D ELECTRON TUBE 5678 5960-00-230-5262

*IF THE ME-459/U VOLTMETER IS NOT AVAILABLE, ALL MODELS OF THE ME-30(*)/U VOLTMETER MAY BE USED.

8 *TM 11-6625-274-12

T ECHNICAL M ANUAL HEADQUARTERS DEPARTMENT OF THE ARMY No. 11-6625-274-12 WASHINGTON 25, D.C., 14 June 1960

TEST SETS, ELECTRON TUBE

TV-7/U, TV-7A/U, TV-7B/U, AND TV-7D/U

Paragraph Page CHAPTER 1. INTRODUCTION Section I. General Scope ...... 1 3 Forms and records ...... 2 7 II. Description and data Purpose and use ...... 3 7 Technical characteristics ...... 4 7 Table of components ...... 5 7 Description of test set ...... 6 8 Differences in models ...... 7 8

CHAPTER 2. INSTALLATION AND OPERATING INSTRUCTIONS Section I. Service upon receipt of equipment Unpacking ...... 8 10 Checking unpacked equipment...... 9 11 II. Controls and indicator General ...... 10 11 Controls, indicators, and jacks ...... 11 11 III. Operation under usual conditions General instructions ...... 12 13 Test leads ...... 13 14 Tube test sockets ...... 14 14 Tube test data...... 15 14 Adapters ...... 16 15 IV. Operating test set Starting procedure ...... 17 16 Operating procedure...... 18 16 Checking filament continuity (12-volt Filament tubes) ...... 19 17 Reading meter ...... 20 18 Gas test ...... 21 18 Noise test ...... 22 19 Panel lamp test ...... 23 19 Testing special tube types ...... 24 19 Testing subminiature tubes ...... 25 19 Stopping procedure ...... 26 20

*This manual supersedes so much of TM 11-5083, 29 September 1953, including C1, 2 September 1955; C2, 8 February 1956, and C3, 1 April 1959, as pertains to operation and organizational maintenance; so much of C4, 26 August 1959, as pertains to packaging and repackaging; TM 11-6625-274-10P, 11 June 1959, and so much of TM 11-6625-274-20P, 11 June 1959, as pertains to the maintenance allocation chart.

1 Paragraph Page v. Operation under unusual conditions General ...... 27 20 Operation at low temperatures ...... 28 21 Operation under tropical conditions ...... 29 21 Operation in desert climates ...... 30 21

CHAPTER 3. MAINTENANCE INSTRUCTIONS General ...... 31 22 Materials required ...... 32 22 Preventive maintenance ...... 33 22 Visual inspection ...... 34 25 Equipment performance checklist ...... 35 25 Removal of chassis ...... 36 27 Tube replacement ...... 37 27 Preferred-type tubes ...... 38 28 Replacement of lamps ...... 39 28

CHAPTER 4. SHIPMENT, LIMITED STORAGE, AND DEMOLITION TO PREVENT ENEMY USE Section I. Shipment and limited storage Removal from service ...... 40 30 Repackaging for shipment or limited storage ...... 41 30 II. Demolition of materiel to prevent enemy use Authority for demolition ...... 42 32 Methods of destruction ...... 43 32

APPENDIX I. REFERENCES ...... 33 II. OPERATOR’S MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LIST ...... 34 III. MAINTENANCE ALLOCATION CHART ...... 37

2 CHAPTER 1

INTRODUCTION

Section I. GENERAL

1. Scope

a. This manual describes Test Sets, ELectron structions for operation under usual and un- Tube TV-7/U (fig. 1), TV-7A/U (fig. 2), usual conditions, cleaning and inspection of TV-7B/U (fig. 3), and TV-7D/U (fig. 4), and the equipment, and replacement of parts avail- covers installation, operation, and first and able to first and second echelon maintenance second echelon maintenance. It includes in- personnel.

TM6625-274-12-1

Figure 1. Test Set, Electron Tube TV-7/U, less running spares.

3 TM6625-274-12-14

Figure 2. Test Set, Electron Tube TV-7A/U, less running Spares.

4 TM6625-274-12-2

Figure 3. Test Set, Electron Tube TV-7B/U, less running spares.

5 Figure 4. Test Set, Electron Tube TV-7D/U, less running spares.

6 b. Official nomenclature followed by (*) is port of Damaged or Improper Shipment, as used to indicate all models of the equipment prescribed in AR 700-58 (Army), Navy Ship- item covered in this manual. Thus, Test Set, ping Guide, Article 1850-4 (Navy), and AFR Electron Tube TV-7(*)/U represents Test 71-4 (Air Force).

Sets, Electron Tube TV-7/U, TV-7A/U, TV- d. Preventive Maintenance Form. Prepare 7B/U, and TV-7D/U. DA Form 11-266 (fig. 11 and 12), Maintenance Check List for Signal Equipment (Test Equip- 2. Forms and Records ment), in accordance with instructions on the a. Electronic Failure Report. Fill out and form. forward DD Form 787-1, Electronic Failure Report-Signal Equipment, to the Commanding e. Parts List Form. Any comments con- Officer, U.S. Army Signal Equipment Support cerning omissions and discrepancies in appen- Agency, Fort Monmouth, N.J., as prescribed dix II or III in this manual will be prepared in AR 700-39. on DA Form 2028 and forwarded directly to b. Unsatisfactory Equipment Report. Fill the Commanding Officer, U.S. Army Signal Equipment Support Agency, Fort Monmouth, out and forward AF TO Form 29, Unsatis- factory Report, to the Commander, Air Mate- N.J. ATTN: SIGFM/ES-ML. riel Command, Wright-Patterson Air Force f. Comments on Manual. Forward all other Base, Ohio, as prescribed in AF TO 00-35D-54. comments on this manual direct to the Com- c. Report of Damaged or Improper Ship- manding Officer, U.S. Army Signal Publica- ment. Fill out and forward DD Form 6, Re- tions Agency, Fort Monmouth, N.J.

Section II DESCRIPTION AND DATA

3. Purpose and Use 4. Technical Characteristics Test Set Electron Tube TV-7(*)/U is a Power Supply: portable tube tester of the dynamic mutual Input voltage ...... 103.5 to 126.5 Volts ac, conductance type. It is used to test and to single phase. measure performance capabilities and to de- Frequency ...... 50 to 1,000 cps. termine rejection limits for electron tubes used Power consumption . . 45 watts at 115 volts, in receivers, low-powered transmitters, and 50 cps. many other electronic equipments. The follow- Meter ...... 0 to 120 arbitrary units. ing tests can be made with Test Set Electron Operating tempera- -40° to + 125° Tube TV-7(*)/U: ture limits Fahrenheit. a. Continuity test (ballast tubes). Number of tubes ...... 2. b. Dynamic mutual conductance test (am- Indicator lights: plifier tubes). PILOT ...... One type 47. c. Emission test (rectifier tubes). SHORTS ...... One type NE-45. FUSE ...... One type 81. d. Gas test (amplifier tubes). 5. Table of Components e. Noise test. The components of Test Set, Electron Tube f. Panel lamp test. TV-7(*)/U are listed in a below and the spare g. Shorts test. parts in b below.

7 a. Components.

Dimensions (In.) Quantity Item Unit Height Depth Length weight (lb)

1 Test set including tubes and lamps ...... 6 1/16 18 1 Adapter E105: 3E29, 829-B or 832-A tubes ...... 1 Adapter E107: 2C39 tube ...... 1 Adapter E104: Subminiature tubes ...... 1 Adapter X10B: socket saver, 7-pin miniature (TV-7D/U) ...... 1 Adapter X7B: socket saver, 9-pin miniature (TV-7D/U)...... 1 Adapter X3B: socket saver, octal (TV-7D/U) ...... 2 Test leads ......

1 set Running spares (b below) ...... 15

b. Spare Parts. binder inside the cover holds TB 11-5083-1 (tube test data book (par. 15)). The cover is Quantity Item hinged by slip hinges and can be removed from 1 Electron tube, type 5Y3WGTA the case. 1 Electron tube, type 83 b. An indicating meter and all controls, 1 Lamp, neon NE-45 knobs, pushbuttons, sockets, and indicating 1 Lamp, incandescent No. 47 lamps are on the front panel. The necessary 1 Lamp, incandescent No. 81 data for setting and operating the controls to test the various tube types are contained in the tube test data book (a above). One end of the 6. Description of Test Set alternating current (ac) line cord is perma- (fig. 1-4) nently attached to the panel; the other end a. Test Set, Electron Tube TV-7(*)/U terminates in a male plug. (test set) is self-contained in a carrying case equipped with a carrying handle. The cover 7. Differences in Models is secured to the case by luggage-type fasten- Test Sets, Electron Tube TV-7(*)/U are ers. Retainer brackets on the inside of the similar in purpose, operation, and appearance. cover are used to secure and store the power Some models have been modified to improve cable, pin straighteners for 7- and 9-pin minia- operational features. External differences are ture tubes, and adapters (par. 16). A ring as follows:

Item TV-7/U TV-7A/U TV-7B/7 TV-7D/U

F RANGE on FUNCTION Not used. Not used. Not used. Used. SWITCH. BIAS and SHUNT controls ...... Markings en- Markings etched Markings etched Markings etched graved on a into test set into test set into test set dial. panel. panel. panel. SHORTS lamp ...... No panel Panel marking. Panel marking. Panel marking. marking. Subminiature tube test socket Rectangular. Round on some Rectangular. Rectangular. X109. equipments. Storage clip for ac line cord plug. Not used. Used. Used. Used. Storage clips for test leads ...... Not used. Not used. Used. Used. Tip of test lead plug (2 each) . . . . 3/32-inch 5/64-inch 3/32-inch 3/32-inch diameter. diameter. diameter. diameter.

8 nom TV-71U TV-7A/U I Tv.78/u TV-7D/U I Grid (G), plate (P), and NOISE Accommodates Accommodates Accommodates Accommodates jacks. 3 I 32-inch 6/64-inch 3132-inch 3132-inch diameter tip diameter tip diameter tip diameter tip plugs. plugs. plugs. plugs. Gasket around edge of cover ...... Not used. Used. Used. used. Socket saver adapters X1OB, X7B, Not provided. Not provided. Not provided. Provided. and X3B, 7-pin and 9-pin mini- ature and octal base.

9 CHAPTER 2

INSTALLATION AND OPERATING INSTRUCTIONS

Section I SERVICE UPON RECEIPT OF EQUIPMENT

8. Unpacking will be strapped only for intertheater ship- a. Packaging Data. When packed for ship- ment. A typical packing case and its contents ment, the test set is packaged in an inner are shown in figure 5. fiberboard carton. Spare parts are in a small, (1) The inside dimensions of a packing corrugated carton, protected by a sleeve on case that contains four packaged test top of the test set. The inner fiberboard carton sets is approximately by is sealed with gummed tape, and is then placed by inches; the volume is 4.8 within an outer fiberboard carton, with all cubic feet, and the weight is 106 seams and joints sealed with water-resistant, pounds. pressure-sensitive tape. A wooden packing (2) The outside dimensions of a test set case may also be used when a multiple of four packed in fiberboard cartons is test sets is shipped. The wooden packing case by by inches; the volume is

TM6625-274-12-4

Figure. 5. Typical packaging.

10 1.2 cubic feet, and the weight is (6) Open the inner fiberboard carton and pounds. remove the contents.

b. Removing Contents. 9. Checking Unpacked Equipment

(1) Cut and fold back the metal straps Check the equipment against the packing (when used). list. When no packing list accompanies the equipment, use the table of components (par. (2) Remove the nails from the wooden 5) as a general check. If the equipment is cover and one side of the wooden damaged, refer to paragraph 2. After a test set packing case with a nailpuller. Re- is removed from its fiberboard container, re- move the cover and the side. Do not lease the fasteners, open the cover, and proceed attempt to pry off the cover or the as follows: side; prying may damage the equip- a. Check to see that the adapters (fig. 8) ment. are held firmly to the cover. (3) Remove the envelope that contains the b. Check all controls for ease of rotation. technical manuals. Tighten loose knobs. c. Check for a broken meter glass and (4) Remove the outer fiberboard carton broken lamps. from the wooden packing case. d. Check the ac line cord, test leads, and (5) Open the outer fiberboard carton and rubber gasket around the edge of the cover remove the inner fiberboard carton. (except on TV-7/U) for signs of deterioration.

Section II. CONTROLS AND INDICATORS

10. General Switch or control Function Improper setting of the FILAMENT VOLT- AGE switch (fig. 6) or incorrect operation of OFF: Removes voltage the pushbutton switches may damage the tube from FILA- MENT VOLT- under test. Be sure that all the controls and AGE switch. switches are set properly before testing tubes. FILAMENT selectors, Connects filament of tube left and right (10- under test to filament volt- 11. Controls, Indicators, and Jacks position, 5-section age supply. a. Switches and Controls. rotary switches) GRID selector (10-po- When set in one of positions Switch or control Function sition, 5-section 1-9, connects control grid rotary switch) of tube under test to bias POWER switch ...... ON: Connects ac and signal voltages. power to test PLATE selector (10- When set in one of positions set. position, 5-section 1-9, connects plate of tube OFF: Removes ac rotary switch) under test to plate voltage power from supply. test set. SCREEN selector (10- When set in one of positions Provides an 18-step selection FILAMENT VOLT- position, 5-section 1-9, connects screen grid of of filament voltages from AGE (20-position rotary switch) tube under test to screen rotary switch) 0.6-volt to 117 volts ac. voltage supply. BLST.: Enables ballast When set in one of positions tubes to be CATHODE selector tested for con- (10-position rotary 1-9, connects cathode of tinuity and switch, 0-position tube under test to desired supplies volt- open) test circuit. age to certain SUPPRESSOR selector When set in one of positions rectifier tubes (10-position rotary 1-9, connects suppressor for emission switch, 0-position grid of tube under test to tests. open) desired test circuit.

11 Switch or control Function Pushbutton switch Function Switch position Action FUNCTION SWITCH SHORTS: Positions 1-5 con- Normal Removes plate and (11-position, 8-sec- nect various screen grid (when tion rotary switch elements of used) voltages (TV-7D/U), 10- tube under test from tube under position, 6-section to shorts test test. rotary switch on all circuit. other models) RANGES: Positions A-E 4-GAS 1 ...... Depressed Connects ac test (A-F, TV- voltage to certain 7D/U) control diode tubes and sensitivity of connects plate meter circuit voltage and bias and magnitude voltage to tube of signal volt- under test when age. checking amplifier tubes for gas. LINE ADJUST control Adjusts amount of input voltage to power trans- Normal Removes diode test former. voltage or plate voltage and BIAS control...... Adjusts amount of bias volt- bias voltage from age applied to tube under amplifier tube test. under test. SHUNT control ...... Adjusts sensitivity of meter 5-GAS 2 (used Depressed Connects a resistor circuit. with 4-GAS 1 into control grid when amplifier circuit of tube un- b. Pushbutton Switches. tubes are tested der test. Pushbutton switch Function for gas) Normal Short-circuits re- sister in control Switch position Action grid circuit of Depressed Connects meter into 1-LINE ADJ ...... tube under test. line test circuit. 6-OZ4...... Depressed Connects tube under Normal Disconnects meter test to an ac test from line test cir- voltage. a cuit. Normal Removes ac voltage Depressed Connects diode tube 2-DIODE ...... from tube under under test to an test. ac test voltage, and connects low 7-RECT...... Depressed Connects tube under screen grid volt- test to an ac test age (if required) voltage. a to tube under test Normal Removes ac voltage when pushbutton from tube under 3-MUT. COND. test. is depressed. a 8-METER REV. . . . . Depressed Reverses polarity of Normal Removes ac test voltage applied to voltage from diode meter. under test and connects normal Normal Permits normal po- screen grid volt- larity of voltage age (if required) to be applied to to tube under test meter. when pushbutton a Voltage will vary slightly, depending on LINE ADJUST setting. 3-MUT. COND. is depressed. c. Meter, Indicator Lamps, and Jacks. 3-MUT. COND. . . . . Depressed Connects tube under test to plate and Note. The jacks on the TV-7A/U accommodate screen grid (when 5/64-inch diameter tip plugs; the jacks on all other required) volt- models of the test set accommodate 3/32-inch diameter ages. tip plugs.

12 Meter, indicator lamp, Meter, indicator lamp Function or jack Function or jack

Meter ...... Indicates condition of tube under FUSE lamp ...... A fuse and an overload indicator. test. A LINE TEST mark at Grid (G) and plate Provide a means of connecting midscale is used to establish (P) jacks grid and plate test leads to correct input voltage to power bias and plate voltage circuits, transformer. respectively. SHORTS lamp (not Indicates and locates shorted a panel marking tube elements. NOISE test jacks Enables test set operator to on TV-7/U) (2) check level of noise generated PILOT lamp ...... Indicates when power is de- by tube under test. livered to test set.

Section III. OPERATION UNDER USUAL CONDITIONS

12. General Instructions operating procedure (par. 18), and the use of the test data book (par. 15) are understood. Do not operate the test set until the functions Refer to paragraph 24 whenever a special test- of the controls and the indicators (par. 11), the ing procedure is indicated in the test data book.

Figure 6. Test Set, Electron Tube TV-7/U, front panel.

13 13. Test Leads Tube test socket Tube type tested Two test leads are provided to make con- nections from the grid (G) and the plate (P) panel jacks to the top caps of tubes under test. 4 pin...... Four-pin standard tubes. Each test lead is terminated on one end in a 5 pin...... Five-pin standard tubes. 3/32-inch diameter tip plug (5/64-inch on TV- 6 pin ...... Six-pin standard tubes. 7A/U) and on the other end in a battery-type clip with an insulating cover. The test leads are 7 pin...... Seven-pin standard tubes and stored inside the cover of the test set case. panel lamps. OCTAL...... Octal (8-pin) tubes. 14. Tube Test Sockets LOKTAL ...... Loktal base (8-pin) tubes. (fig. 7) After the controls on the test set have been SUB MIN. (2) ...... Round (8-pin) or flat-type (7- set as directed in the tube test data book (par. pin) subminiature tubes. 15), place the tube to be tested in the proper NOVAL ...... Nine-pin miniature tubes. tube test socket listed below. Socket-saver 7 PIN MIN ...... Seven-pin miniature tubes. adapters (par. 16d) are mounted in the 7- and 9-pin miniature sockets and in the octal socket ACORN ...... Acorn type tubes. on the TV-7D/U (fig. 4).

TM6625-274-12-5

Figure 7. Test sockets, socket-saver adapters installed.

15. Tube Test Data a. Tube Type. Type numbers of electron tubes which the test set is designed to test are TB 11-5083-1 (test data book) is mounted listed numerically and alphabetically in this on the inside of the cover of the test set. The column. Tubes that have type letters instead test data book contains operating instructions for the test set, information necessary to set of numbers, such as XXB, are listed at the end of the table. the controls when testing various tube types, a conversion table for VT tube designations, b. Fil. Correct filament or heater voltages and a data table for CV type tubes. The control for the listed tube types are shown in this settings for the various tube types are tabu- column. lated in nine columns. Read the headings from c. Selectors. The correct setting for the two left to right as follows: FILAMENT selectors and the GRID, PLATE,

14 SCREEN, CATHODE, and SUPPRESSOR be tested in the OCTAL socket of the test set. selectors are listed in this column. The settings A spring locking action grips the leads of the are shown in the same order in which the tube after they are inserted in the adapter. switches appear on the panel, listing first the Pull the two tabs upward to open the lock be- two FILAMENT selectors and then continuing, fore inserting the leads. The lock is secured from left to right, with the remaining selectors. by pressing down on the two tabs until a click d. Bias. This column lists the setting for is heard. the BIAS control. b. Adapter E105. Adapter E105 (fig. 8) e. Shunt. This column lists the setting for enables tube type 3E29, 829-B, or 832-A to be the SHUNT control. Setting of this control is tested in the OCTAL socket of the test set. The required only when the FUNCTION SWITCH adapter consists of a special socket for these is in the RANGES A SHUNT position. tubes mounted on an octal base. The two leads f. Range. The settings for the FUNCTION on the adapter connect to the two plate caps SWITCH are listed in this column. The letters of the tube under test.

A through E (A through F, TV-7D/U) corres- c. Adapter E107. Adapter E107 (fig. 8) pond to the RANGES markings for the FUNC- enables tube type 2C39 (a lighthouse tube) to TION SWITCH. be tested in the OCTAL socket of the test set. g. Press. Under this heading are listed the The three pairs of spring contacts, from the test pushbuttons that are used for the various center outward, connect to the cathode and one tube types and their individual sections in the side of the filament, to the grid, and to the case of multipurpose tubes. plate, respectively, of the tube under test. The h. Min Value. The minimum, numerical center contact connects to the other side of values of meter indication for the various tubes the filament of the tube under test. and individual sections of multipurpose tubes d. Socket-Saver Adapters (TV-7D/U). are shown in this column. Any tube showing Three socket-saver adapters (fig. 7) are in- a meter reading less than the value indicated cluded with each TV-7D/U: one 7-pin minia- in this column should be replaced. ture, one 9-pin miniature, and one octal. The i. Notations. Special information pertain- adapters are installed in their corresponding ing to particular tube types is listed under this sockets and receive the wear rather than the heading. permanent socket. When worn so that satisfac- tory contact can no longer be made, the socket- 16. Adapters saver adapters can be replaced without a. Adapter E104. Adapter E104 (fig. 8) disconnecting the leads from their respective enables subminiature tubes with long leads to test socket.

TM6625-274-12-7

Figure 8. Adapters E104, E105, and E107.

15 Section IV. OPERATING TEST SET

17. Starting Procedure and SUPPRESSOR selector switches select the test socket connections so that correct test volt- Before operating the test set, perform the ages are applied to the elements of the tube starting procedure below to check the general under test. For clarity, these selector switches operation of the equipment. If the results ob- will, in some instances, be referred to collec- tained from the procedures in b through e be- tively as “the selectors”. When referred to col- low are satisfactory, the test set is ready for lectively, they are considered in the same order operation. as above. Note. If an abnormal indication is obtained during the starting procedure, refer to the equipment perfor- b. Setting Controls. mance checklist (par. 35) for corrective measures. (1) Locate the type number of the tube a. Connect the test set to a 115-volt ac, 50- to be tested in the test data book (fig. to 1,000-cycle per second (CPS), power source. 1-4). b. Set the POWER switch to the ON posi- (2) Turn the FILAMENT VOLTAGE tion; the PILOT lamp should light. knob to the position shown in the Fil c. Press pushbutton 1 - LINE ADJ. Ro- column of the test data book. tate the LINE ADJUST control knob until the (3) Set the selectors to the letters and the meter pointer rests over the LINE TEST mark numbers indicated in the Selectors on the meter face. column in the test data book. Be sure d. Release pushbutton 1 - LINE ADJ. the numbers indicated by the selector e. Check the short test circuit. knobs are the same, if read from left (1) Set the left FILAMENT selector at to right, as the numbers in the test A, the right FILAMENT selector at data book. P, and the GRID, PLATE, SCREEN, Example: To test a tube type 6SN7, the CATHODE, and SUPPRESSOR se- Selectors column in the test data book indi- lectors at 0, 0, 0, 2, and 2, respectively. cates that the selectors are to be set at (2) Rotate the FUNCTION SWITCH HY4-5062. Start at the left and turn the through the five SHORTS positions. FILAMENT (left) selector knob to H, and the FILAMENT (right) selector knob to Y. The neon SHORTS lamp (fig. 6) Turn the GRID selector knob to number 4; should glow in positions 2 and 3 of the PLATE selector knob to number 5; the the FUNCTION SWITCH to indicate SCREEN selector knob to number 0; the that the short test circuit is function- CATHODE selector knob to number 6; and ing properly. the SUPPRESSOR selector knob to 2. The sequence of letters and numbers thus se- f. Set the POWER switch to the OFF posi- lected (HY4-5062) is identical with that tion. listed in the test data book. The selectors are interconnected electrically so that two differ- 18. Operating Procedure ent voltages cannot be applied to the same The procedures below apply to single-section tube pin at the same time. Therefore, acci- and multipurpose tubes (tubes that have more dental shorts are avoided. than one set of elements in the same envelope). (4) Set the BIAS control to the number Test each section or group of elements of a indicated in the Bias column of the multipurpose tube separately. Test data for the test data book. multipurpose tube types are listed by sections (5) Set the SHUNT control to the number (pentode sect., triode sect., diode sect., etc) in indicated in the Shunt column of the the test data book. test data book. If no setting is indi- Caution: Do not insert a tube into a test cated, disregard this step and proceed socket until all the controls have been set in with the steps below. accordance with the instructions below. (6) Set the FUNCTION SWITCH knob a. Selectors. The FILAMENT (left and to 1. right), GRID, PLATE, SCREEN, CATHODE, (7) Insert the tube to be tested in the

16 proper test socket (fig. 7) and, if the d. Selection of Range. Turn the FUNC- instructions in the Notations column TION SWITCH knob from the SHORTS side require it, connect panel jacks G or P of the switch to the RANGES position indicated to the tube caps with the test leads. in the test data book under the column headed (8) Set the POWER switch to the ON Range. This automatically sets the sensitivity position. The PILOT lamp should of the meter circuit to the proper level for the light. tube under test. Note. For tubes of the heater cathode e. Operating Pushbuttons. type, allow approximately 5 to 10 seconds Caution: Do not press pushbutton 3 - MUT. for the cathode to reach operating tempera- COND. when testing rectifier tubes. ture before testing the tube. (9) Adjust the meter pointer (par. 17c (1) Press the pushbutton (par. 11b) that and d) to the LINE TEST mark on is indicated in the Press column of the the meter scale. test data book. Note. Some tubes, such as the 17DE4 and Caution: Release the pushbutton as the 32ET5, require the meter pointer to be soon as the meter pointer comes to set at a position other than the LINE TEST rest and the meter indication is read. mark. Refer to the Notations column of the If the pushbutton is depressed too test data book before testing the tube. long, the tube under test may be C . Shorts Test. damaged. (1) Turn the FUNCTION SWITCH knob (2) Refer to the Notations column for from position 1 to position 5; mean- special information pertaining to spe- while tap the tube lightly and watch cific tube types. the neon SHORTS lamp on each (3) When the correct pushbutton is de- switch position. Tubes with shorted pressed, the meter will indicate the elements will cause the lamp to glow. condition of the tube. Compare the Note. A list of tubes that are not to be meter reading to the value indicated tapped during the shorts test is contained in the test data book. in the Min value column of the test data book. (2) A short is indicated by a steady glow on both halves of the SHORTS lamp. 19. Checking Filament Continuity (12-Volt A flash when the switch is turned Filament Tubes) from one position to another does not indicate a defective tube. Intermittent Certain electron tubes in the 12-series may flashing when the tube is tapped in- have open filament center taps that may not dicates the existence of loose elements affect the testing or the operation of these which can cause noisy or erratic tubes, if the tube is used in a 12-volt filament operation. circuit. The test set does not have a specific filament continuity test circuit. A visual check (3) Tubes that have more than one sec- for filament continuity of tube types 12AT7, tion, such as the 25D8, must be tested 12AU7, 12AV7, 12AX7, and 12AZ7 can be for shorts on each section. made as follows: (4) Discard a shorted tube without fur- ther tests. a. Perform the starting procedures (par. Note. Some tubes will show a shorted 17). condition on certain positions of the FUNC- b. Set the FILAMENT VOLTAGE switch TION SWITCH even though they are good to 12.6. tubes. Check the Notations column in the c. Set the left and right FILAMENT selec- test data book for remarks. “Short on 1 and 2” would mean that a short indication tor switches to E and to V, respectively. in positions 1 and 2 is normal. d. Set the GRID, PLATE, SCREEN, (5) If the tube is not shorted, other tests CATHODE, and SUPPRESSOR selector may be performed as required. switches each at zero.

17 e. Insert the tube in its proper test socket and perform the procedures in paragraph 17b through d. -* -s R91goc f. Observe the filament of the tube; both sides should be lighted. 60 ...... 12s0 2,600 6260 12,600 Note. DO not prolong the continuity test; keep the 60 ...... 1,600 woo 7,s00 16,000 filament lighted just long enough to make a thorough observation. 70 ...... 1,760 S,600 8,760 17,600 g. Set the POWER switch to the OFF posi- 80 ...... 2,000 4,000 10,OOO 20,000 tion, and set the FILAMENT VOLTAGE 90 ...... 2~60 4,600 11*O 22,600 switch to 6.3. h. Set the left and right FILAMENT selec- 100 ...... 2,500 6,000 12,600 25,000 tor switches to K and V, respectively. 110 ...... 2,760 6,600 18,760 27,600 i. Perform the procedures in paragraph 120 ...... 8,000 6,000 16,000 80,000 17b through d. j. Observe the filament of the tube; only Now nm I ad r, Tv-m/u. one-half the filament should be lighted. k. Set the POWER switch to the OFF posi- 21. Gas Test tion, and set the left and right FILAMENT Pushbuttons 4 - GAS 1 and 5 - GAS 2 are selector switches to E and Z, respectively. used when testing amplifier tubes for gas con- l. Perform the procedures in paragraph 17b tent. Multipurpose tubes are tested for gas through d. only on the amplifier sections; the gas test does m. Observe the filament of the tube; the not apply to diode sections or to rectifier tubes. other half of the filament should be lighted. Allow tubes of the filament type to warm up be- n. If the tube shows filament continuity, fore testing the tube for gas content. proceed to test the tube in accordance with the a. Perform the procedures in paragraph instructions in paragraphs 20 through 22. 17a through d and f.

20. Reading Meter b. Set the controls as indicated in the test data book. The meter scale is calibrated in divisions c. Insert the tube in the proper test socket from 0 to 120. When the proper pushbutton is and set the POWER switch to ON. depressed, the meter pointer will indicate the d. Hold down pushbutton 4 - GAS 1 and condition of the tube under test as a numerical adjust the BIAS control (fig. 6) until the meter value. The numerical value of the meter read- pointer indicates 10 on the scale. ing is then compared to the minimum accepta- Note. If the meter pointer cannot be adjusted down ble value in the Min value column in the test to 10, turn the BIAS control knob until the meter read- data book. If the number indicated on the ing is 100. meter is less than the listed minimum value, e. Hold down pushbutton 4 - GAS 1 and the tube should be replaced. The following press pushbutton 5 - GAS 2. chart may be used to convert the numerical f. If the tube contains gas, the meter value of the meter reading to mutual conduct- pointer will move up the scale. A movement of ance in micromhos. more than 1 division on the scale indicates a gassy tube. COXiq nlw h miwoah09 g. Turn off the test set (par. 26). Rng, E Mat rodh# Ran@ B Reap c kqo D (not,) 22. Noise Test o ...... o o o o The NOISE test jacks on either side of the 10 ...... 260 Soo 1,260 2,500 SHORTS lamp (fig. 6) are used when testing electron tubes for noise. A radio receiver or 20 ...... 500 1,000 2,s00 6,000 an audio amplifier with a loudspeaker, and a 80 ...... 750 1,500 3,750 7,500 set of test leads, are required to perform the 40 ...... 1,000 2,000 5,000 10,OOO test.

18 a. Perform the starting procedures (par. The 1-megohm resistors required to test the 17). 6CD7 and the 6DA5, and the 30-volt battery b. Set the controls for the tube under test required to test the 6360 and the 6524, are as indicated in the test data book, and set the not supplied with the test set. The selectors POWER switch to ON. are set for the tube under test in the normal c. Set the FUNCTION SWITCH to manner. However, before the POWER switch SHORTS 1. is set to the ON position, the resistors or the d. Connect a test lead to each of the NOISE battery is connected to the test socket pins as jacks. directed in the test data book. e. Connect the test lead from the left-hand Caution: Disconnect the 30-volt battery be- NOISE jack to the chassis of the radio re- fore resetting any of the selector switches. ceiver or the audio amplifier. b. Voltage Regulators. When voltage regu- f. Connect the test lead from the right- lator tubes are tested, sufficient voltage must hand NOISE jack to either the antenna of a be applied to ionize the gas and to cause the radio receiver or to the input of an audio am- voltage regulator tube to conduct. Refer to plifier. Turn the radio receiver or the audio the test data book for the proper use of the amplifier power switch to the on position. pushbuttons and for control settings. c. Thyratrons. To test thyratrons, set the g. Tap the tube under test while the FUNC- controls as indicated in the test data book. TION SWITCH is turned from position 1 Press the proper pushbutton and adjust the through position 5. BIAS control until the tube strikes; this is in- h. Intermittent disturbances within the dicated by a glow between the tube elements tube which are too brief to register on the and a sharp rise of the meter pointer. The SHORTS lamp will be reproduced as static by limits of the bias voltage between which the the loudspeaker. tubes should strike are shown in the test data i. Turn off the test set (par. 26). book. After the tube strikes, the condition of 23. Panel Lamp Test the tube is read on the meter. d. Tuning Eye Tubes. Set the controls as The receptacle in the center of the large, indicated in the test data book. When the 7-pin socket (fig. 7) is used to check panel proper pushbutton is depressed, note the effect lamps. on the tuning eye and compare it to the data a. Perform the procedures in paragraph in the Notations column. When the eye is 17a through d and f. closed, a thin, bright line is observed; when the b. Set the FILAMENT selector switches to eye is open, a wide, dark area is observed. HR. c. Set the FILAMENT VOLTAGE switch 25. Testing Subminiature Tubes to the proper voltage for the lamp to be tested. Subminiature tubes are tested in SUB. MIN. If the exact voltage is not known, set the sockets X109 and X110 (fig. 9). FILAMENT VOLTAGE switch to 0.6 volt a. Subminiature tubes of the round type and increase the voltage as required. with short wire leads or pins are tested in d. Insert the lamp in the receptacle and special socket X110. This circular socket has press the center contact of the lamp firmly eight contacts. against the bottom of the receptacle; then tilt (1) Several basing arrangements (fig. 10) the lamp until the metal shell makes contact are used for these tubes. The arrows with the rim of the receptacle. A defective near several of the tube bases in fig- lamp will not light. ure 10 indicate the location of the dot e. Turn off the test set (par. 26). on the base of the tube. Check the Notations column in the test data 24. Testing Special Tube Types book; examine the tube and identify a. Special Testing Procedures. Certain the basing. Use adapter E104 (par. electron tubes, such as the 6CD7, 6DA5, 6360, 16a) when the subminiature tube has and 6524, require a special testing procedure. long leads.

19 (2) Insert the leads or pins in the corres- ponding contacts of socket X110. If the leads are long enough, set the POWER switch to the OFF position, grasp each lead about one-eighth inch from its end with the tips of a pair of long-nosed pliers, and insert the leads into the proper socket contacts. Set the POWER switch to the ON posi- tion and test the tube. b. Subminiature tubes of the flat or in-line- contact type with pins or leads are tested in flat socket X109 (fig. 9). The tube pins or leads must be inserted so that the dot on the base of the tube is directly in line with the small, molded dot on the socket. TM6625-274-12-9 c. Subminiature tube types are identified in the test data book by a star beside the type Figure 10. Basing diagrams for subminiature number. The applicable basing for the various tubes (letters, A, B, C, D, E, and F identify round types is indicated in the Notations col- basing for use with test data book). umn. The basing designation letter refers to the diagrams shown in figure 10. b. Remove the tube under test from the test socket. c. Place the adapters, if used, under the clamps on the inside of the cover. d. Disconnect the ac line cord from the power source and wind it counterclockwise around the retainer bracket on the inside of the cover. Secure the plug under the storage TM6625-274-12-8 clip (TV-7B/U and TV-7D/U, fig. 3 and 4), Figure 9. Top view of sockets X109 (flat) or under the coiled ac line cord (TV-7/U and and X110 (circular). TV7A/U). e. Place the test leads, if used, in the stor- age clips (not on TV-7/U). On the TV-7/U, 26. Stopping Procedure store the test leads under the coiled ac line a. Set the POWER switch to the OFF po- cord or as shown in figure 1. sition. f. Close the cover and secure the fasteners.

Section V. OPERATION UNDER UNUSUAL CONDITIONS

27. General 28. Operation at Low Temperatures

The test set is designed for normal operation Subzero temperatures and climatic condi- through a temperature range from -40°F to tions associated with cold weather may effect + 125°F. The operation of the equipment may the efficient operation of the test set. be more difficult in regions where extreme cold, a. Extreme cold makes the ac line cord and heat, humidity, or moisture conditions prevail. other rubber parts stiff and brittle. Handle Paragraphs 28 through 30 provide operational the equipment carefully to avoid cracking the information that may be used to minimize the insulation on the ac line cord and on the test effects of regional extremes. leads.

20 b. Keep the equipment in a warm, dry lo- to damage from moisture and fungus. The cation. If possible, keep the test set in a heated high relative humidity causes condensation enclosure. A standby heater is not provided; when the temperature of the equipment drops therefore, leave the test set turned on if possi- below that of the surrounding air. Adequate ble. ventilation will minimize this condition. Keep the cover of the test set closed as much as c. Allow the test set to warm up for 10 to possible. Wipe all moisture and fungus from 15 minutes before testing tubes. The length the exterior of the test set with a clean, lint- of warmup time depends upon the temperature free cloth. of the surrounding air.

d. If equipment that has been exposed to 30. Operation in Desert Climates the cold is brought into a warm room, moisture Desert climates expose the test set to damage will form on it and may cause fogging of the from dirt, dust, sand, and the effects of strong meter glass. Dry the equipment thoroughly. sunlight. Provide means for keeping dust and e. Keep the cover of the test set closed at sand from entering the holes in the test sockets, all times when the equipment is not in opera- adapters, and jacks, and from accumulating tion. This will prevent an accumulation of around the pushbuttons and other moving parts moisture within the equipment due to sweating. of the test set. Clean and dust the equipment frequently. When not in use, keep the cover 29. Operation Under Tropical Conditions closed to keep dust and dirt out of the exposed Warm, damp climates expose the equipment parts.

21 CHAPTER 3

MAINTENANCE INSTRUCTIONS

31. General zational maintenance personnel. Items not applicable to the test set are lined out in figure The procedures in paragraphs 33 through 12. References in the ITEM block in figure 12 39 are to be performed by the operator or are to paragraphs that contain additional organizational maintenance personnel. Oper- maintenance information pertinent to the par- ator’s maintenance consists of preventive main- ticular item. Instructions for the use of the tenance (par. 33), visual inspection (par. 34), form appear on the form. and replacement of electron tubes (par. 37) and lamps (par. 39). Organizational mainte- b. Items. The information shown below supplements DA Form 11-266. The item num- nance of the test set is limited to preventive maintenance (par. 33) and to the replacement bers correspond to the ITEM numbers on the form. of the adapters (fig. 8), knobs and pushbut- tons, indicator light lens, cable clamps, and ItHl Maintmmc* pmcodurcs clip insulators. The only tools required are I those tools normally available to the repair- 1 Use a clean cloth to remove dust, dirt; mois- I man-user because of his assigned mission. I ture, and grease from the case, the front panel, and the adapters. If necessary, wet 32. Materials Required a cloth with cleaning compound and then wipe the parts with a dry, clean cloth. The materials required for operator’s and I organizational maintenance are as follows: 2 Inspect the clips that hold the adapters and a. Cleaning compound (Federal stock No. the clips that hold the test leads (TV-7 B/U and TV-7 D/U ) for tight spring action. 7930-395-9542). Check the ring binder for proper operation. b. Cleaning cloth. Check the PILOT, FUSE, and SHORTS lamps for broken glass. Check to see that c. Sandpaper, #0000. the socket-saver adapters (fig. 7) are tightly secured in their respective test sockets. 33. Preventive Maintenance I a. DA Form 11-266. DA Form 11-266 (fig. Warning: Cieaning compound is fiammabie and ita 11 and 12) is a preventive maintenance check- fumes are toxic. Do not use it near a iiame; proyide list to be used by the operator and organi- adequate ventilation.

22 TM 6625-274-12-10

Figure 11

23 TM6625-274-12-11

Figure 12.

24 34. Visual Inspection 35. Equipment Performance Checklist

a. When the equipment fails to perform a. General. The equipment performance properly, check the items listed below. checklist provides a procedure for systemati- (1) Test leads, if used, poorly connected cally checking equipment performance. All cor- or improperly connected. rective measures that the operator or the (2) Incorrect pushbutton depressed. organizational maintenance man can perform (3) Improper setting of selector switches are given in the Corrective measures column. or controls (par. 18b (3)). When using the checklist, start at step 1 and (4) Battery or resistors improperly con- follow each step in order. If the corrective nected (par. 24a). measures indicated do not repair the equipment, (5) FUSE lamp defective. troubleshooting is required by higher echelon. (6) LINE ADJUST control improperly Note on the repair tag how the equipment per- adjusted (par. 17c). formed and the corrective measures that were b. If the above checks do not locate the taken. Perform the steps in b below. trouble, proceed to the equipment performance checklist (par. 35). b. Checklist.

Shp I f.m Adion or csmditiem Corredi.* meosurm

P 1 Ac line cord. Connect ac line cord to R power source. E 2 POWER switch. Set switch to ON position. PILOT lamp lights. Check ac line cord connection. P Remove (par. 39a ) and check A ( par. 23) PILOT lamp; re- R place if defective. A Remove (par. 39fl) and check T (par. 23) FUSE lamp; re- o place if defective. R Higher echelon repair required. Y 3 Meter. Pointer stays at zero. Defective type 86 tube; replace tube (par. 37) . 4 Pushbutton l— Depress pushbutton. Meter pointer moves Higher echelon repair required. LINE” ADJ. up-scale. 5 LINE ADJUST Rotate control knob, while Meter pointer moves Check for low-line voltage if control knob. holding pushbutton l— when control knob is pointer will not adjust LINE ADJ. down, until turned. properly. meter pointer is directly over LINE TEST mark. Higher echelon repair required. 6 Selectors. Set selectors as directed in Selector knobs should When a selector pointer is be- paragraph 17e ( 1). be tight and point tween two numbers or two directly at a number letters, rotate switch fully or letter. The switch counterclockwise. Loosen detents should be knob setscrew, turn knob un- positive. til it points directly at the first number or Ietter, and tighten setscrew. Tighten I,oose knobs. If switch detents are not posi- tive, higher echelon repair is required. 7 FUNCTION Rotate switch through the SHORTS lamp glows Check switch settings. SWITCH. five SHORTS positions. at positions 2 and 3 Replace SHORTS lamp (par. of switch. 39 b). Higher echelon repair required. 8 POWER switch. Set switch to OFF position. PILOT lamp goes out.

25 * Itm dab w CdhIa s 9 Seleetore and Set according to test being T controls. performed. ; 10 Tube under teat. Insert in proper test socket. Tube pins enter test Check for bent pins. Straighten Make connections 8s re- socket without forc- pins of miniature tubes in T quired. ing. one of the pin straighteners. In I POWER switch. ! Set stitch ti ON position. PILOT lamp lights. E 12 Meter. Checking tube for dynamic Meter pointer indi- If meter pointer stays at zero, Q mutual conductance, em- catas condition of tube under test may be de- u ission, or gas. tube under test fective. I when proper push- Check setting of selectors and P button is depressed. controls. M Test another tube. E Higher echelon repair required. N 18 BIAS controL Gas test. Meter pointer can be Adjust BIAS control knob un- T adjusted to 10 by til pointer indicates 100, then turning control proceed with gas test. P knob. E R 14 Panel lamp test Checking a panel (pilot) A good lamp will Make good contact between F socket. lamp (par. 23). light. lamp and test socket. o Check c~ntrol settings. R Lamp may be defective; check M other lamps if available. A Higher echelon repair required. N 1s Adapter E104 Testing long lead subminia- Meter indicates condi- Unsnap locking device on adap- c (fig. 8). ture tube. tion of tube when ter, move tube up and down E proper pushbutton to check seating of leads, and is depressed. secure locking device. Test tube again. Check control settings. Check ~otatio~ column in test data book for type bas- ing used. Compare place- ment of tube leads to basing diagram (fig. 10). Replace adapter and check tube again. If meter pointer does not move when correct push- button is depressed, test another tube. Higher echelon repair required. Adapter E106 Testing tube type 3E29, Meter indicates condi- Check seating of adapter and (fig. 8). 829-B, or 832-A. tion of tube when tube. pushbutton 3 — Check plate lead for a good MUT. COND. is de- connection. pressed. Check setting of controls. Test another tube. If meter pointer does not move, re- place adapter. Higher echelon repair required. 17 Adapter E107 Testing tube type 2C89. Meter indicates condi- Check seating of tube and (fig. 8). tion of tube when adapter. Remove adapter pushbutton 3 — and tube and squeeze spring MUT. COND. is de- contacts closer together if pressed, necessary. Check setting of controls. Replace adapter and tube in test socket and test tube again.

26 Shl Adu w Cditlu NwR91 indication COrmtivc MOOlurw

E Test another tube. If meter Q pointer does not move, re- u place adapter. I Higher echelon repair required. P M 18 Socket X109 Testing flat subminiature Meter indicates condi- Check to see that dot on base E (fig. 9). tube. tion of tube when of tube is aligned with dot N proper pushbutton on test socket. T is depressed. Slide tube leads up and down in test socket to insure good P contact. E Check setting of controls. R Test another tube. F Higher echelon repair required. o R 19 Socket X11O Testing round subminiature Meter indicates condi- Slide tube leads up and down M (fig. 9). tube. tion of tube when in test socket to insure good A proper pushbutton contact. N is depressed. Check setting of controls. c Check Notations column in test E data book for type basing used. Compare placement of tube leads to basing diagram (fig. 10). Test another tube. Higher echelon repair required. s !0 ‘ube under tesk Remove from test socket. T !1 ‘OWER switch, Set to OFF position. PILOT lamp goes out. o 82 ic line cord. Remove ac line cord plug P from power source. —

36. Removal of Chassis (2) Carefully lower the test set into the case. Be sure that no wires are caught a. Removal. between the front panel and the edge (1) Unsnap the latches and open the cover of the case. of the test set. (3) Replace the screws that secure the (2) Unwind the ac line cord from the front panel to the case. Tighten the retainer bracket and remove the cover screws in rotation a little at a time to from the test set. Remove the cover prevent binding. by sliding it to one side until the (4) Replace the cover on the case, wind hinge pins are disengaged. the ac line cord counterclockwise on (3) Remove the screws that secure the the retainer bracket, secure the plug front panel to the case. under the clip (not on TV-7/U), close (4) Hold the front panel to the case, turn the cover, and secure the latches. the test set over, and gently place it on a clean, flat surface. 37. Tube Replacement (5) Slowly lift the test set case upward When trouble occurs, check the ac line cord until it is clear of the chassis. connection and the control settinge before re- b. Replacement. moving any tubes. If tube failure is suspected, (1) Position the test set case so that the use the tube substitution method (a below) to handle is forward. check the tubes.

27 Caution: Do not rock or rotate a tube when Caution: Be careful not to hit the removing it from a socket; pull it straight out meter case with tube type 83 when removing the tube. with a tube puller. (3) Replace the tube (a above) with one a. Tube Substitution Method. Replace a of the running spares. suspected tube (b below) with a new tube. If (4) Set the tube (or a replacement) in the equipment still does not work, remove the the socket and secure it with the tube new tube and put back the original tube. Repeat clamp. this procedure with the other tube. If the test (5) Replace the chassis in the case (par. set is still inoperative, other checks are re- 36b). quired (par. 35b).

b. Replacing Tubes in Test Set, Electron 38. Preferred-Type Tubes Tube TV-7(*)/U. Check the tubes in the test A preferred-type electron tube, type set as follows: 5Y3WGTA, has been developed as a direct re- placement for nonpreferred types 5Y3GT and (1) Remove the chassis from the case 5Y3WGT (par. 7). The 5Y3WGTA is used in (par. 36a). the power supply. When replacement of a (2) Remove the tube clamp (fig. 13) from 5Y3GT or a 5Y3WGT is necessary, replace it the threaded stud and remove the with a 5Y3WGTA. Do not substitute a 5Y3GT tube. or a 5Y3WGT for a 5Y3WGTA.

TM6625-274-12-13

Figure 13. Tube location.

39. Replacement of Lamps bayonet-type bases. Unscrew and remove the PILOT lamp indicator jewel to gain access to The FUSE, PILOT, and SHORTS lamps are the PILOT lamp. To remove either lamp, press removable from the front panel of the test set. downward, turn the lamp to the left, and lift a. The FUSE lamp and PILOT lamp have straight up. To replace the FUSE or PILOT

28 lamp, insert the lamp in the appropriate socket, b. The SHORTS lamp has a screw-type press downward, turn the lamp to the right, base. Remove the lamp by turning it to the and release it. Replace the PILOT lamp indi- left; replace the lamp by turning it to the cater jewel. right.

29 CHAPTER 4

SHIPMENT, LIMITED STORAGE, AND DEMOLITION

TO PREVENT ENEMY USE

Section I SHIPMENT AND LIMITED STORAGE

40. Removal From Service

a. Set the POWER switch to the OFF po- Flexible corrugated fiberboard ...... 10 Sq ft sition and disconnect the test set from the Waterproof wrapping paper ...... 10 Sq ft Gummed paper tape ...... 3 ft power source. Pressure-sensitive tape ...... 4 ft b. Place the adapters under the clamps on Metal strapping (%- by 0.020-inch) . . 8 ft (Nok Strapping seal. required) the cover. Wooden box (inside dimensions: c. Wind the ac line cord counterclockwise 189$ by 10?4-by 7%-inch) 1 ea (9 bd ft) around the retainer bracket and place the plug b. Packaging. under the clip (not on TV-7/U). Place the (1) Technical manual. Package the tech- test leads under the coiled ac line cord nical manuals within a close-fitting (TV-7/U and TV-7A/U) or as shown in fig- bag fabricated of waterproof wrap- ures 1 and 2. On the TV-7B/U and the ping paper. Seal the seams with pres- TV-7D/U, insert one end of the test leads into sure-sensitive tape. the storage clips and connect the alligator clips (2) Spare parts. Wrap each part within to the studs (fig. 3 and 4). a layer of flexible corrugated fiber- d. Close the cover and secure it with the board. Seal the seams with gummed latches. paper tape. Overwrap the flexible corrugated fiberboard with water- 41. Repackaging for Shipment or Limited proof wrapping paper and seal with pressure-sensitive tape. Storage (3) Test set. The procedure used to pack- (fig. 14) age the test set is the same as the The exact procedure for repackaging de- procedure used to package the spare pends on the material available and the condi- parts ((2) above). tions under which the equipment is to be c. Packing. shipped or stored. Adapt the procedures out- (1) Fabricate a wooden box. lined below whenever circumstances permit. (2) Place the packaged test set (b(3) The information concerning the original pack- above) in the wooden box. (3) Place the spare parts (b(2) above) aging (par. 8) will also be helpful. and the technical manuals on top of a. Material Requirements. The following the test set. materials are required for repackaging Test (4) Nail down the wooden cover. Set, Electron Tube TV-7(*)/U. For stock (5) Strap the wooden box when inter- numbers of materials, consult SB 38-100. theater shipment is involved.

30 TM6625-274-12-12

Figure 14. Field repackaging diagram.

31 Section Il. DEMOLITION OF MATERIEL TO PREVENT ENEMY USE

42. Authority for Demolition b. Cut. Use axes, handaxes, machetes, or knives; cut the ac line cord and test leads. The destruction procedures outlined in para- graph 43 will be used to prevent further use c. Burn. Use gasoline, kerosene, oil, flame- of the equipment. Demolition of the equipment throwers, or incendiary grenades; bum the will be accomplished only upon the order of technical manuals and test data book. the commander. Warning: Be extremely careful with explo- 43. Methods of Destruction sive and incendiary devices. Use these items Any or all of the methods of destruction only when the need is urgent. given below may be used. d. Explode. Use grenades, TNT, or fire- a. Smash. Use sledges, axes, hammers, arms, if explosives are necessary. crowbars, or any other heavy tools available; smash the case, cover, adapters, front panel, e. Dispose. Bury or scatter destroyed parts and meter. or throw them into nearby waterways.

32 APPENDIX I

REFERENCES

Following is a list of applicable references 7A/U, TV-7B/U, available to the operator or organizational and TV-7D/U maintenance personnel of Test Set, Electron TM 11-6625-274-20P Organizational Mainte- Tube TV-7(*)/U: nance Repair Parts SB 38-100 Preservation, Packag- and Special Tools ing and Packing Ma- List and Mainte- terials, Supplies and nance Allocation Equipment Used by Chart for Test Sets, the Army Electron Tube TV- TB 11-5083-1 Tube Test Data for 7/U, TV-7A/U, Electron Tube Test TV-7B/U and TV- Sets TV-7/U, TV- 7D/U

33 APPENDIX II

OPERATOR’S MAINTENANCE REPAIR PARTS

AND SPECIAL TOOLS LIST

Section I INTRODUCTION

1. Scope storage, requisitioning, allowances, and issue purposes. a. General. This appendix lists items sup- (6) Expendability. Expendable items are plied for initial operation and for running spares. The list includes tools, accessories, indicated by X; nonexpendable items parts, and material issued as part of the major are indicated by NX. item, and all items authorized for basic oper- (7) Quantity authorized. Under “Items ator maintenance of the equipment. End items Comprising an Operable Equipment,” of equipment are issued on the basis of allow- the column lists the quantity of items ances prescribed in equipment authorization supplied for the initial operation of tables and other documents that are a basis the equipment. Under “Running for requisitioning. Spares and Accessory Items” the quantities are those issued initially b. Columns. The columns are as follows: with the equipment as spare parts. (1) Source, maintenance, and recovera- The quantities are authorized to be bility code. Not used. kept on hand by the operator for (2) Federal stock number. This column maintenance of the equipment. lists the 11-digit Federal stock num- (8) Illustratrations (Figure No.). The num- ber. bers in this column refer to the illus- (3) Designation by model. A dagger tration or illustrations where the part indicates the model in which the part is shown. is used. (9) Illustrations (Item No.). This column (4) Description. Nomenclature or the lists the reference symbols used for standard item name and brief identi- identification of items in the illustra- fying data for each item are listed in tions or text of the manual. this column. When requisitioning, enter the nomenclature and descrip- 2. Critical Items tion on the requisition. A zero slash (0) in the “Description” column (5) Unit of issue. The unit of issue is the indicates items that are expected to fail during supply term by which the individual the first year; also items that will make the item is counted for procurement, equipment inoperative if they fail.

34 TM 6625-274-12-16

Section II

35 TM6625-274-12-15

Figure 15. Electron tubes and lamps.

36 APPENDIX III

MAINTENANCE ALLOCATION CHART

Section I INTRODUCTION

1. Scope (g) Calibrate. To determine, check, or a. General. This appendix assigns mainte- rectify the graduation of an instru- nance functions and repair operations to be ment, weapon, or weapons system, performed by the lowest appropriate mainte- or components of a weapons system. nance echelon. (h) Rebuild. To restore to a condition b. Allocation of Maintenance Functions. comparable to new by disassem- Columns in section II, Allocation of Mainte- bling the item to determine the con- nance Functions, are defined as follows: dition of its component parts and reassembling it using serviceable, (1) Part or component. This column rebuilt, or new assemblies, subas- shows only the nomenclature or stand- semblies, and parts. ard item. Additional descriptive data are included only where clarification (3) 1st, 2d, 3d, 4th, 5th echelon. The sym- is necessary to identify the part. Com- bol X indicates the echelon responsi- ponents and parts comprising a major ble for performing that particular end item are listed alphabetically. As- maintenance operation, but does not semblies and subassemblies are in necessarily indicate that repair parts alphabetical sequence with their com- will be stocked at that level. Echelons ponents listed alphabetically immedi- higher than the echelon marked by X ately below the assembly listing. are authorized to perform the indi- (2) Maintenance function. This column cated operation. Column 5 is not used. indicates the various maintenance (4) Tools required. This column indicates functions allocated to the echelon the tool, test, and maintenance equip- capable of performing the operations. ments required to perform the main- (a) Service. To clean, to preserve, and tenance functions. These numbers are to replenish fuel and lubricants. identified in section III, Allocation of (b) Adjust. To regulate periodically to Tools for Maintenance Functions. prevent malfunction. (5) Remarks. This column contains any (c) Inspect. To verify serviceability and notations necessary to clarify the to detect incipient electrical or data cited in the preceding columns. mechanical failure by scrutiny. c. Allocation of Tools for Maintenance (d) Test. To verify serviceability and Functions. Columns in section III, Allocation to detect incipient electrical or of Tools for Maintenance Functions, are as mechanical failure by use of special follows: equipment such as gages, meters, (1) Tools required for maintenance func- etc. tions. This column lists the tools and (e) Replace. To substitute serviceable test equipment required to perform assemblies, subassemblies, and parts the maintenance functions. for unserviceable components. (2) 1st, 2nd, 3rd, 4th, and 5th echelon. A (f) Repair. To restore to a serviceable condition by replacing unservice- dagger in columns 3, 5, and 6 able parts or by any other action re- indicates that the tool or test equip- quired utilizing tools, equipment, ment is allocated to that echelon. Col- and skills available, to include weld- umns 2 and 4 are not used. ing, grinding, riveting, straighten- (3) Tool code. This column lists the tool ing, adjusting, etc. code assigned. The numbers are used

37 in the maintenance allocation chart allocated up to and including fourth echelon to refer to the indicated item. are authorized to the organization operating (4) Remarks. Not used. this equipment.

2. Maintenance by Using Organizations 3. Mounting Hardware When this equipment is used by signal serv- The basic entries of the maintenance allo- ice organizations organic to theater headquar- cation chart do not include mounting hardware ters or communication zones to provide theater such as screws, nuts, bolts, washers, brackets, communications, those maintenance functions and clamps.

38 Section II

39 40 41 By Order of Wilber M. Brucker, Secretary of the Army: L. L. LEMNITZER General, United States Army, Official: Chief of Staff. R. V. LEE, Major General, United States Army, The Adjutant General.

Distribution: Active Army: To be distributed in accordance with DA Form 12-7 requirements for TM 11 Series plus the following additional formula: USASA (1) 6-848 CNGB (1) 6-866 Def Atomic Spt Agcy (6) 6-856 Tech Sti, DA (1) except 6-878 CSigO (18) 6-876 USA Abn & Elct Bd (1) 6-415 USA ATB (1) 6-416 US ARADCOM (2) 6-600 (AA-AD) US ARADCOM Rgn (2) MDW (1) 6-606 Seventh, US Army (5) 6-617 EUSA (6) 6-627 Corps (2) 6-1oo USASCS (26) 6-101 JBUSMC (2) 6-115 Units org under the fol TOE: (2 copies 6-116 each) 6-126 1-7 6-126 1-17 6-186 1-26 6-186 1-27 6-200 1-87 6-201 1-67 6-800 1-107 6-801 1-207 6-315 6-s 6-816 6-6 6-826 6-7 6-826 6-8 6-401 6-16 6-416 6-16 6-416 S-17 6-600 6-35 6-501 6-86 6-625 5-87 6-686 5-188 6-686 6-192 6-687 6-216 6-646 6-216 6-668 6-217 6-676 6-218 6-676 5-226 6-677 6-226 5-227 6-611 6-278 6-680

42 6-631 11-168 11-600 (AA-AE) 7 11-666 7-2 11-667 7-11 11-663 7-12 11-687 7-16 11-692 7-16 11-697 7-19 11-608 7-26 12-17 7-26 12-82 7-27 17 7-81 17-2 7-82 17-17 7-62 17-22 7-95 17-26 7-96 17-26 3-16 17-27 8-16 17-82 8-76 17-86 8-187 17-36 8-600 (AA-AH) 17-37 +22 17-46 9-47 17-46 8-66 17-61 9+6 17-52 9-76 17-68 17-65 8-217 17-66 8-877 17-67 9-600 (AA-AC) 17-62 1*22 17-65 10+77 17-66 1*686 17-67 11-6 17-86 11-6 17-86 11-7 17-87 11-8 17-116 11-16 17-116 11-16 17-117 11-17 17-125 11-18 17-126 11-26 17-127 11-37 19-27 11-S8 19-29 11-89 19-95 11-46 19-37 11-46 19-65 11-47 19-67 11-66 19-217 11-S6 19-500 (AA-AE) 11-67 20-46 11-68 20-46 11-96 29-56 11-96 80-16 11-97 30-19 11-98 80-22 11-99 82-61 11-117 82-56 11-16s 82-67 11-166 82-600 11-167 38-2

43 44-447 88-67 (AA-AC) 44-600 88-610 (AAj AB) 44-686 86-61 89-62 44-687 88-61 86+1 89-401 44-646 44-647

4+18 44-649 44-16 46-600 (AA-AC) U-16 66-11 66-M 66-16 44-87 66-87 66-86 44-70 66-47 66-67 44-87 66+6 44-101 6H6 44-116 44-116 6H16 u-286 66+6 44-286 M-m 44-287 66-128 44-246 66-126 44-486 66-157 44-486 66-500 (AA-AE) 44-487 67 44-446

NC/ Stati AG (8); tl~ame M Active Army except l llowance ie one copy te eaeh unk USARt None For explanation of l bbrevixtione uee& eee AR H.

44