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U.S. Department of Defense TV-2/U User's Manual

1. a eG TT ELECTRON TUBES replace ER EBEN CUNEO cto 22122252 a ee el ee o 8 L7 EE ete ___ _______ _________________ ce UNS RET ee WASHER ree X5 ________________________ dI d cec Oe cee TS INDIMOR relee WULTIMETER REPLACEMENT RI 22 ee ee RETAINER ELECTRON Tug TT _________________ SHIELD ELECTRON TUBE 4 _________________ SOCKETS ELECTRON UE O O speci ur Fon ir SWITCHES TRANSFORMER POWER STEP UP AND STEP DOWN replace Db 1 replace ees WIRE WS 16 U WS 17 U replace ea TV 2 U TV 2A B U 2 3 4 5 6 7 8 TOOLS REQUIRED FOR MAINTENANCE FUNCTIONS REMARKS TV 2 U TV 2A B U continued ETER TEST SET TS 682 GSM 1 TEST SET ELECTRON TUBE Log Scd E OOL EQUIPMENT TK 21 G TOOLS AND TEST EQUIPMENT AVAILABLE TO THE REPAIRMAN USER BECAUSE OF HIS 5 ASSIGNED
2. E BE irf emer ED FOR BARAKS CUTS KINNO CONTE mA AIORATION STRAIN AND FRAYING 1 INSPECT TERMINALS OF TRANSFORMERS FIXED CHECK FOR LOOSEN EES le or chvamun ITENS SUCH bes CAPACITORS RESISTORB 9 49094G0 POTENTIQOUETERS MAMDLES LATCHES Hinges AUEOBTATS FON CORROSION DIRT AMD LOOSE CONTACT 6 CLEAN AMO TIGHTEN SWITCHES CLEAN INTERIOR OF CHASSIS CABINETS FOR RUST AND CORROSION INSPECT GASKETS BUSHINGS FOR WEAR AND QAMAGE INBPECT METERS FOR DAMAGED GLASS CASEL 12 WOOT BEATING OF ATADILY ACCESSIBLE ITEMS OF PLUCR OUT MATURE FUBEN LONNIE GOS LAMPS d INSPECT TERMINAL BLOCKS FOR LOOSE CONNECTIONS CRACKS AND BREAKS SPECT EXPOMEO METAL SUA 90 MOT HEMBVE ROCK OR TWIST YOJNSPECT USE ONLY IF DEFICIENCIES NOTED ARE NOT CORRECTED DURINE amp THE INSPECTION INDICATE DIRECT PRESSURE TO INBURE THE ITEM FULCY Marke NIYE ACTION TAKEN FOR CORRECTION Contnve on pate 4 Ji mors ITEM METER GLASS CRACKED REPORTED To MIG HER ECHELON MAINTENANGE FOR REPLACE MENT TM6625 316 12 6 Figure 9 DA Form 11 266 pages 2 and 3 as used by second echelon c Equipment Performance Checklist START PERF EQUIP Step Action or condition Connect the TV 2 U to a po
3. Inspect the equipment to None determine that it is free of bare spots rust and corrosion If these con ditions exist refer to higher echelon for repair 33 4 Cleaning Inspect the exterior of Test Set Electron Tube TV 2 U The exterior surfaces should be clean and free of dust dirt grease and fungus a Remove dust and loose dirt with a clean soft cloth Warning Cleaning compound is flammable and its fumes are toxie Provide adequate ventilation Do not use near a flame b Remove grease fungus and ground in dirt from the case use a cloth dampened not wet with Cleaning Compound Federal Stock No 7930 395 9542 c Remove dust or dirt from pluga and jacks with a brush 4 Caution Do not prese on the meter faces glase when cleaning the meter may become damaged d Clean the front panel meters and control knobs use a soft clean cloth If dirt is difficult to remove use mild soap and water Page 39 Delete figure 6 Page 40 Delete figure 7 Page 47 Delete paragraphs 40 through 42 and substitute 40 Scope of Organizational Maintenance The maintenance duties assigned to the organizational repairman of the tube tester are listed below together with a reference to the specific maintenance function The duties assigned do not require tools and test equipment other than those issued with the equipment a Monthly preventive maintenance checks and services par 42 1 b Rustproofing and pain
4. Spt Cen 1 95 157 USA Elect Mat Agcy 12 57 Chieago Proc Dist 1 57 100 NG State AG 3 units same as Active Army except allowance is one copy to each unit USAR None For explanation of abbreviations used sce AR 320 50 Changes now in force C 2 and C 3 TM 11 6625 316 12 C3 CHANGE HEADQUARTERS DEPARTMENT OF THE ARMY No 3 WASHINGTON D 10 July 1974 Operator and Organizational Maintenance Manual TEST SETS ELECTRON TUBE TV 2 U TV 2A U TV 2B U AND TV 2C U TM 11 6625 316 12 16 March 1961 is changed as follows Page 5 paragraph 1 1 Delete and substitute 1 1 Indexes of Publications a DA Pam 310 4 Refer to the latest issue of DA Pam 310 4 to determine whether there are new editions changes or addi tional publications pertaining to the equipment b DA Pam 310 7 Refer to DA Pam 310 7 to determine whether there are modification work orders MWO S pertaining to the equipment Paragraph 2 Delete and substitute the following 2 Forms and Records a Reports of Maintenance and Unsatisfactory Equipment Maintenance forms records and reports which are to be used by maintenance personnel at all maintenance levels are listed in and prescribed by TM 38 750 b Report of Packaging and Handing Deficiencies Fill out and forward DD Form 6 Report of Packaging and Handling De ficiencies as prescribed AR 700 58 NAVSUP PUB 378 AFR 71 4 P4030 29 and DSAR 4145 8 c Discrepancy in S
5. 10 11 12 13 14 15 16 Set PLATE SCREEN RANGE switch to position specified for tube on tube test data roll chart and adjust PLATE and SCREEN fine controls Set BIAS RANGE switch to position specified for tube on tube test data roll chart and adjust BIAS fine control Set quality SHUNT control to position indicated for tube on tube test data roll chart and set GM SIGNAL RANGE switch to position F Depress PRESS TO TEST P4 switch to locking position Adjust GM CENTERING control _____ Set GM SIGNAL RANGE switch to position specified for tube on tube test data roll chart Adjust SIGNAL V R fine control ______ Depress the appropriate PRESS TO TEST switch to locking position and read percent quality of tube on PER CENT QUALITY meter For TV 2B U only insert a 9 pin tube known to be in good condition into the NOVAL tube socket and test as speci fied on tube test data roll chart PLATE and SCREEN VOLTS meter indicates exact voltage indicated for tube on tube test data roll chart GRID BIAS VOLTS meter indicates exact voltage indicated for tube on tube test data roll chart Pointer of PERCENT QUALITY meter may deflect slightly PERCENT QUALITY meter indi cates 0 Pointer ofll PERCENT QUALITY meter deflects Pointer of SIGNAL meter adjusts exactly to redline PERCENT QUALITY meter indica tion is above minimum requirement of tube as specified on tube test data roll chart Tube checks
6. 3 Read intermediate leakage values on the resistance scale of the PLATE meter The amount of leakage is indi cated in megohms e When the test is completed set the ON OFF switch to the OFF position remove the tube under test from the test socket and return all switches and controls to their safety positions 158 20 Filament Continuity Test a Perform the operations in paragraphs 15 and 16 b If the filament continuity test is the only test to be made set only the FIL and the FIL SELECTORS switches as indicated in the tube test data roll chart Leave the remaining SELECTORS switches in their safety positions par 14 c Operate the SHORT TEST switch to the V position For the TV 2 U aline the dot on the PLATE fine control with the dot on the panel For the TV 2A U and TV 2B U aline the line mark ing on the PLATE fine control with the line marking on the panel d Depress the PRESS TO TEST Pl switch 1 If the FIL CONT SHORT lamp glows the filament is good 2 If the FIL CONT SHORT lamp does not glow the fila ment is open Discard the tube Note Occasionally a filament will show continuity when cold but will open when it warms up If this condition is suspected set the FILAMENT RANGE switch to the normal voltage for the tube under test let the tube warm up for several minutes and repeat the test 21 Transconductance Test a Perform the operations described 15 and
7. Acorn tubes SUB MIN SEVEN Seven pin subminiature tubes SUB MIN EIGHT Eight pin subminiature tubes b Test Adapters A test adapter X13B 1 is included to provide a test socket for eight pin subminiature long lead tubes Three test adapters Fig 3 X3B eight pin octal X7B nine pin noval and XIOB seven pin miniature are included with each TV 2B U The test adapters are installed in their corre 19 We8285316 2 1 Figure 5 Panel of Test Set Electron Tube TV 2B U showing location of test adapters fuse also shown sponding sockets and receive the wear rather than the permanent socket When worn so that satisfactory contact can no longer be made the test adapters can be replaced without disconnecting the leads from their respective test socket 15 Preliminary Starting Procedure a Check the voltage and frequency of the alternating current ac power source to be used for the operation of Test Set Elec tron Tube TV 2 U The voltage must be between 103 5 and 126 5 volts ac and the frequency between 50 and 1 000 cycles per second cps Cution Never connect the TV 2 U to a direct current dc power source b Release the latches and raise the cover of the tube tester c Remove the power cord plug from the dummy power cord 20 receptacle on the panel fig 1 and unwind the power cord from the brackets d Check to see that a
8. Electron Tube TV 2 U TV 2A U and TV 2B U c Throughout this manual Test Set Electron Tube TV 2 U is referred to as the tube tester 2 Forms and Records a Unsatisfactory Equipment Report Fill out and forward DD Form 787 1 Electronic Failure Report Signal Equipment to the Commanding Officer U S Army Signal Materiel Support Agency ATTN SIGMS ML Fort Monmouth N J as prescribed in AR 700 39 b Report of Damaged or Improper Shipment Fill out and for ward DD Form 6 Report of Damaged or Improper Shipment as prescribed in AR 700 58 c Preventive Maintenance Forms Prepare DA Form 11 266 figs 6 7 and 9 Maintenance Check List for Signal Equipment Test Equipment in accordance with instructions on the form d Parts List Form Forward DA Form 2028 Recommended Changes to DA Technical Manual Parts Lists or Supply Manuals 7 8 or 9 directly to the Commanding Officer U S Army Signal Materiel Support Agency ATTN SIGMS ML Fort Monmouth N J with comments on parts listings e Comments on Manual Forward all other comments on this publication directly to the Commanding Officer U S Army Signal 5 Materiel Support Agency ATTN SIGMS PA2d Fort Monmouth N J Section DESCRIPTION AND DATA 3 Purpose and Use Test Set Electron Tube TV 2 U fip a portable tube tester of the dynamic mutual conductance type It is used to test and to measure performance capabilities and to dete
9. U S Army Electronics Materiel Support Agency ATTN SELMS MP Fort Monmouth N J One information copy will be furnished to the individual s immediate supervisor e g officer noncommissioned officer supervisor Page 8 paragraph 7 as changed by C 1 18 Sep 1961 After the last sentence add Test Set Electron Tube TV 2C U is identical externally with Test Set Electron Tube TV 2B U Page 38 Delete paragraphs 32 and 33 and substitute 32 Scope of Operator s Maintenance The maintenance duties assigned to the operator of Test Sets Electron Tube TV 2 U arc listed below together with a reference to the para graphs covering the specific maintenance functions The duties assigned do not require tools or test equipment other than those issued with the equipment a Daily preventive maintenance checks and services par 33 2 b Weekly preventive maintenance checks and services par 33 3 Cleaning par 33 4 Visual inspection par 34 Operational check par 35 Removal and replacement of chassis par 36 Tube replacement 37 AA Replacement of fuses and lamps 39 33 Operator s Preventive Maintenance Preventive maintenance is the systematic care servicing and inspec tion of equipment to prevent the occurrence of trouble to reduce down time and to assure that the equipment is serviccable a Systematic Care The procedures given in paragraphs 33 2 t
10. 750 The Army Equipment Record System and Procedures By Order of the Secretary of the Army EARLE G WHEELER General United States Army Official Chief of Staff J C LAMBERT Major General United States Army The Adjutant General Distribution Active Army DASA 6 CSigO 7 USASA 2 CofT 1 CNGB 1 CofSptS 1 CofEngrs 1 USA CD Agey 1 TSG 1 USCONARC 5 USAMC 5 USARCARIB Sig Agcy 1 ARADCOM 2 Sig Fld Maint Shop 3 ARADCOM Rgn 2 Units org under fol TOE OS Maj Comd 3 2 UNOINDO OS Base Comd 2 7 LOGCOMD 2 7 100 USAECOM 5 11 5 USAMICOM 4 11 6 USASCC 4 11 7 MDW 1 11 16 Armies 2 11 36 Corps 2 11 55 USA Corps 3 11 56 USATC AD 2 11 57 USATC Engr 2 11 58 USATC Inf 2 11 97 USATC Armor 2 11 98 USASTC 5 11 117 Inst 2 except 11 155 Ft Monmouth 65 11 157 Svc Colleges 2 11 500 4 Br Sve Sch 2 except 11 557 USASCS 50 11 587 USASESCS 100 11 592 GENDEP 09 2 11 597 Sig Dep OS 12 17 Sig Sec GENDEP 5 17 100 Army Dep 2 except 29 1 Ft Worth 8 29 15 Lexington 12 29 16 Sacramento 28 29 21 Tobyhanna 12 29 25 APG 5 29 26 Springfield Armory 5 29 36 USMA 5 29 51 USA Elect RD 29 55 White Sands 13 20 56 USA Elect RD Actv 29 75 Ft Huachuca 12 29 79 USA Trans Tm 1 29 105 Army Tint 1 29 109 POE 1 32 56 USAOSA 1 37 AMS 1 37 100 WRAMC 1 39 51 1 Army Pie Cen 2 99 32 USA
11. GM TESTING to read as follows 1 Perform all operations listed in I through IV 2 Depress P4 and reset controls as shown on tube test data roll chart 3 Release P4 set GM SIGNAL RANGE control to F and depress P4 4 Set PERCENT QUALITY meter to O with GM CEN TERING control 5 Release P4 and return GM SIGNAL RANGE control to tube test data roll chart listing 6 Depress P4 if PERCENT QUALITY meter reading is above value in MIN LIM column tube is good Release P4 f Insert the power cord plug into the ac outlet 21 Section IV OPERATION UNDER USUAL CONDITIONS 16 Starting Procedure Note To start the equipment first make sure the controls are set as required by the preliminary starting procedure par IB and then perform procedures described in a through i below a Locate the type number of the tube to be tested on the tube test data roll chart mounted inside the cover of the tube tester b Set the seven SELECTORS switches to the positions given on the tube test data roll chart for the tube under test Set the switches in the order in which they appear on the tube test data roll chart and on the tube tester panel from left to right starting with the FIL SELECTORS switch on the left hand side Note The seven SELECTORS switches are interconnected electrically so that two different voltages cannot be applied to the same pin of the tube under test at the same time Thus by setting the SELECTORS switches
12. Indicates setting of SHUNT control Indicates which switch or switches through P6 should be pressed for the following tests Pl Filament continuity and zero ing of PLATE ohmmeter for interelement leakage test P2 Emission of diode tubes P3 With P2 emission of multigrid tubes P4 Transconductance P5 Voltage regulator and thyra tron tubes P6 Gas test of amplifier tubes Indicates minimum numerical value as read on PERCENT QUALITY meter for tube under test or individual sec tion of multipurpose tube under test Gives special information or adjustments pertaining to tube under test SHUNT PRESS TO TEST MIN LIM left section MINI MUM LIMITS right section 17 81 SETTING SETTING F 5 sp E L P HRT L R yin E T s E t du tuse f t slur 00 P4 60 3003 GM T 34156 27 63 5 200 3 100 RLSS 64 HE 0 YR VI 15621 6 3 ND 210 3 10 RLE 51 SHORT IN 7 Figure 4 Tube test data roll chart mounted in housing TM6625 316 12 3 Section Ill PRELIMINARY OPERATING PROCEDURES 13 Operating Precautions fig 3 a Do not insert a tube into a test socket until the SELECTORS switches and the FILAMENT RANGE switch are properly ad justed par 16 b Return all controls to their safety positions par 154
13. MISSION METER 1 TV 2 U TV 2A B U 1 2 3 4 5 e 9 SOURCE gt ILLUSTRATIONS MAINTENANCE DESIGNATION sul FEDERAL io AND BY amp STOCK NUMBER ESERIN 52 amp RECOVERABILITY MODEL 5 135 FIGURE ITEM CODE x i NO 1 N 1 E LLLI lll thru AGC MANUAL 11 6625 TEY 920 188 0800 ELECTRON TUBE ae UY 949 _ F ELECTRON TUBE TAY type 15 fpo20 189 080455 P FUSE CARTRIDGE Littlefuse No 312003 _ Fr NEST TV 2 U TV 2A B U 2 PIN 017099 000
14. NOTE 38 X78 AND X OB USED IN TV 28 U ONLY XI38 USED TV 2 U TV 2A U AND TM6625 316 12 12 TV 28 U Figure 10 Test adapters 45 Replacement of Test Adapters fig 19 Replace test adapter X13B used in TV 2 U TV 2A U and TV 2B U and test adapters X3B X7B and XIOB used in TV 2B U only as follows a Removal 1 Remove the tube tester chassis 36 from the case 2 Remove the hexagonal nut from the threaded stud of the test adapter to be replaced Remove the spacing sleeve when replacing test adapter X3B 3 Remove the test adapter from the test socket b Replacement 1 Plug the adapter into its corresponding test socket Be sure to place the spacing sleeve over the threaded stud of test adapter X3B 2 Replace and tighten the hexagonal nut 3 Replace the tube tester chassis in the case 54 CHAPTER 5 SHIPMENT LIMITED STORAGE AND DEMOLITION TO PREVENT ENEMY USE Section SHIPMENT AND LIMITED STORAGE 46 Disassembly of Equipment a Operate all switches and their controls to their safety posi tions par 13d and disconnect the tube tester from the ac power supply b Remove the power cord plug from the ac source c Wind the power cord around the brackets on the front panel and insert the plug into the dummy power cord receptacle that is mounted on the front panel d Close the case and latch it securely 47 Repackaging for Shipment or Limited Storage Mis
15. WATERP 100F PRESSUR SENSITIVE WATERPROOF WRAPPING PAPER LINER WOOD SHIPPING METAL STRAPS 6625 316 12 5 Figure 11 Field repackaging diagram 5 6 c Packing 1 Line the wooden shipping box with waterproof wrapping paper 2 Place the wrapped tube tester in the wooden shipping box 3 Seal the waterproof wrapping paper liner with water proof pressure sensitive tape 4 Place the wrapped technical manuals on top of the sealed waterproof wrapping paper liner and secure them with waterproof pressure sensitive tape 5 Nail the wooden cover in place 6 For intertheater shipment secure the wooden shipping box with metal strapping Section DEMOLITION OF MATERIEL TO PREVENT ENEMY USE 48 Authority for Demolition The destruction procedures outlined in ill be used to prevent the enemy from using or salvaging this equipment Demolition of the equipment will be accomplished only upon the order of the commander 49 Methods of Destruction Any or all of the methods of destruction given below may be used The time available will be the major determining factor for the methods to be used when destruction of the equipment is undertaken The tactical situation also will determine in what manner the destruction order will be carried out a Smash Smash meters switches and controls the instrument panel and chassis tubes capacitors resistors transformers the roll chart housing
16. and 16 b Operate the FUNCTION switch to the TEST position c Operate the PLATE SCREEN RANGE switch to the posi tion specified on the tube test data roll chart d Adjust the PLATE and SCREEN fine controls until the exact voltages specified on the tube test data roll chart are indi cated on the corresponding meters e Depress the PRESS TO TEST P4 switch If the tube is a single indicator the indicator should be closed if the tube is a twin indicator tube such as the 6AD6 or 6AF6 indicator No 1 should be closed and indicator No 2 should be open 31 f Release the PRESS TO TEST P4 switch g For twin indicator tubes operate the SCREEN and SUP PRESSOR SELECTORS switches to the positions specified in the second line of the tube test data roll chart h Again depress the PRESS TO TEST P4 switch If the tube is good the indicator now should be open or in the case of twin indicator tubes indicator No 1 should be open and indicator No 2 should be closed i Perform an emission test on the triode of electron ray in dicators with triode sections such as 6U5 23 The control settings for the emission test are specified in the third entry of the same tube on the tube test data roll chart par IP 28 Ballast Tube Test Test ballast tubes as follows a Perform the operations indicated in paragraph 15 b Operate the FIL SELECTORS switch to the position speci fied in the tube test data roll chart for the tu
17. and the case use sledges axes handaxes pick axes hammers crowbars or heavy tools b Cut Cut cords and wiring use axes handaxes or machetes Warning Be extremely careful with explosive and incendiary devices Use these items only when the need is urgent c Burn Burn cords wiring the tube test data roll chart and technical manuals use gasoline kerosene oil flamethrowers or incendiary grenades d Bend Bend the panel case and chassis e Disposal Bury or scatter the destroyed parts in slit trenches foxholes or other holes or throw them into streams 57 58 APPENDIX REFERENC ES Following is a list of references applicable and available to the operator and unit repairman of Test Set Electron Tube TV 2 U FM 21 5 FM 21 6 FM 21 30 SB 38 100 AR 320 5 AR 320 50 TM 11 6625 316 12P Military Training Techniques of Military Instruction Military Symbols Preservation Packaging and Packing Ma terials Supplies and Equipment Used by the Army Dictionary of United States Army Terms Authorized Abbreviations and Brevity Codes Operator s and Organizational Maintenance Repair Parts and Special Tools List and Maintenance Allocation Chart for Elec tron Tube Test Sets TV 2 U TV 2B U and TV 2B U 1 Scope a This APPENDIX Il MAINTENANCE ALLOCATION appendix assigns maintenance functions and repair operations to be performed by the lowest appropriate mainte nance echelon I
18. firmly in position and secure See that the electron tube retainer for V1 is clamped tight 19 Inspect fixed capacitors on the underside of the tube tester chassis for leaks bulges and discoloration 43 Visual Inspection Before operating the equipment inspect it Inspection will save repair time and may also avoid further damage Inspect the fol lowing for obvious defects a The seating of all tubes in their sockets b Wiring connections on the terminal board c Wiring connections to the switches and meters on the front panel 44 Equipment Performance Checklist a General The equipment performance checklist provides a procedure for systematically checking equipment performance All corrective measures that the second echelon repairman can perform are given in the Corrective measure column When using the checklist start at the beginning and follow each step in order If the corrective measures indicated do not fix the equipment troubleshooting is required by higher echelon Note on the repair tag how the equipment performed and the corrective measures that were taken b Procedure Place the tube tester in operation as shown in the checklist in c below 48 6v one fer marking conditions Satistoctery Adjustment Repair or Replecement required X Defect corrected E i zu See AA AAA ur e EE
19. in the case par 36b 38 Preferred Type Tubes A preferred type electron tube type 6X4W has been developed as a direct replacement for nonpreferred type 6X4 The 6X4W tube is used in the power supply When replacement of a 6X4 type tube is necessary replace it with a 6X4W type tube Do not substitute a 6X4 tube for a 6X4W tube 45 39 Replacement of Fuses and Lamps The two fuses Fl and F2 and the two glowlamps 11C and 12C are removable from the front panel of the tube tester a Replacement of Fuses Fuses Fl and F2 are 3 ampere 250 volt 4 by 1 inch cartridge type fuses fig 3 To remove a fuse press the fuseholder cap and turn it counterclockwise Re move the cap and then remove the fuse from its holder Caution The fuses are rated at 3 amperes each When replac ing a fuse be careful to use a fuse of the same rating b Replacement of Lamps Lamps 11C and 12C are glowlamps with miniature bayonet bases To remove a glowlamp unscrew the indicator light lens press the lamp inward and rotate it counterclockwise and withdraw the glowlamp from its socket 46 CHAPTER 4 ORGANIZATIONAL MAINTENANCE 40 General Organizational maintenance of the tube tester is limited to preventive maintenance paid 42 and to the replacement of the test adapters fig 10 electrical plug connector electrical clip insulator clip knobs 04 through 031 fig 1 indicator light lens and electron tube retai
20. in the order in which the switches are arranged on the panel short circuits are avoided c Set the FILAMENT RANGE switch to the position indi cated on the tube test data roll chart d Insert the tube to be tested into the proper test socket Caution Be careful when inserting and removing loctal acorn and subminiature tubes from their sockets Excessive force will crack the glass seals at the bases of the pins Exert slight pres sure to one side to release the lock of the LOCTAL socket Use the pin straighteners mounted on the tube test data roll chart housing to straighten bent pins of seven and nine pin miniature tubes e If the tube to be tested has a top cap attach the A or B electrical clip Directions as to which clip to use are given in the NOTES column on the tube test data roll chart unless the NOTES column is required for other data In addition one of the SE LECTORS switches will indicate an A or B position If the A position is designated use the A clip if the B position is desig nated use the B clip f Set the ON OFF switch to the ON position The PILOT lamp should glow Allow at least 1 minute warmup time g Adjust the FILAMENT fine control until the FILAMENT VOLTS meter pointer indicates the exact filament voltages speci fied in the RANGE column of the tube test data roll chart unless there is a note to the contrary In the case of a filament voltage of 0 625 6 3 12 6 or 117 volts adjust the control unti
21. limit indicated on the tube test data roll chart discard the tube 2 If the reading borders on the minimum limit the tube may be usable but should be replaced soon 3 If the PERCENT QUALITY meter indication is beyond full scale the tube may be gassy Perform the gas test 22 Release the P4 switch Note A multisection tube may be listed several times on the tube test data roll chart If this is the case reset the SELECTORS switches for each listing in the tube test data roll chart Repeat the short test and the trans conductance test for each new setting o When a test is completed set the ON OFF switch to the OFF position remove the tube under test from the test socket and return all switches and controls to their safety positions 057 22 Gas Test Use the following procedures to determine whether an amplifier 26 tube contains excessive gas When testing a multisection tube make the gas test on an amplifier section it does not apply to diode sections or to rectifiers a Perform the operations in paragraphs 15 16 b Operate the FUNCTION switch to the TEST position c Operate the PLATE SCREEN RANGE switch to the posi tion specified on the tube test data roll chart Warning Do not touch the top cap of a tube under test after plate voltage has been applied d Adjust the PLATE and SCREEN fine controls until the PLATE and SCREEN VOLTS meters indicate the exact voltages specified on the t
22. position 4 Adjust the BIAS fine control until the GRID BIAS VOLTS meter indicates 2 volts 5 Turn the SHUNT control to 90 6 Adjust the PERCENT QUALITY meter to zero 07 7 Set the GM SIGNAL RANGE switch to D 8 Adjust the SIGNAL V R control until the SIGNAL meter pointer is on the red line 9 Depress the PRESS TO TEST P2 switch to its locking position Read the percent quality of the 6SQ7 tube on the PERCENT QUALITY meter If the reading is below the minimum limit of 25 discard the tube if it borders on 25 the tube may be used but should be replaced soon If the meter pointer is beyond full scale test the tube for gas f Test for Excessive Gas To test the tube for gas proceed as outlined below The FUNCTION switch and all SELECTORS switches and range switches are set as in e above and the FILA MENT VOLTS meter indicates 6 3 volts 1 Depress the PRESS TO TEST P2 switch to its locking position 2 Depress and hold down the PRESS TO TEST switch If the pointer of the PERCENT QUALITY meter re mains at 25 or near 25 the tube does not contain exces sive gas If the pointer moves more than three scale divisions in either direction however the tube contains too much gas for satisfactory operation g Measurement of Emission Diode No 1 To measure the emission of diode No 1 adjust the tube test data roll chart so the second line on which the 6507 tube appears is between the hori zontal red line
23. switch 12 Function In ON position applies ac power to unit Depending on type of test selected de pressing one or more switches applies power to tube under test In OPER position permits all tests ex cept short test By turning switch successively through positions V W X Y and Z various tube electrodes are tested for interelement shorts Switch osition Action Permits all types of tube tests except voltage reg ulator and leakage tests VR Permits tests of thyra trons and voltage regu lator tubes in conjunc tion with PRESS TO TEST P5 switch LEAK Permits determining in terelement leakage in megohms as indicated by PLATE meter Turning each of the filament switches to one of positions 1 to 9 connects fila ment voltage to correspondingly num bered base pin of tube under test 0 is no connection Turning the switches to position A or B connects filament voltage to A or B electrical clip respectively When set to one of positions 1 to 9 con nects grid bias and signal voltage to correspondingly numbered base pin of tube under test 0 is no connection In A or B connects grid bias and signal voltage to A or B electrical clip Control PLATE 12 position rotary switch SCREEN 12 position rotary switch CATHODE 12 position rotary switch SUPPRESSOR 12 position rotary switch FILAMENT RANGE 20 position rotary switch FILAMENT
24. switches controls and tube test sockets are located on the panel of the equipment The necessary data for setting and operating the controls to test the various tube types are contained in the tube test data roll chart a above Two electrical clips A and 3 provide connection to external caps of tubes as reqired One end of the power cord is perma nently attached to the panel the other end terminates in a male plug 7 Differences in Models Test Sets Electron Tube TV 2 U TV 2A U and TV 2B U are similar in purpose operation and appearance On some equip ments the FUNCTION switch and the FIL CONT SHORT lamp are marked LEAKAGE VR and SHORT respectively Other external differences among models of the tube tester are shown below Item Tests sets electron tube TV 2 U TV 2A U TV 2B U LS 2 GM CENTERING control PLATE fine control ____ Round fluted knob Test adapters Antiparasitic ferrite beads PERCENT QUALITY meter Dot index markings on knob and panel dot index markings on knob and panel X13B used Interchangeable with TV 2A U __ Line index markings on knob and panel Pointer type knob marking on panel X13B used lne index Interchangeable with TV 2 U ____ Line index markings knob and panel Pointer typ2 knob marking on panel X3B X7B X
25. that might have occurred during shipment If the equipment has been damaged or is incomplete refer td paragraph 2 b If the equipment has been used or reconditioned see whether it has been changed by a Modification Work Order MWO If 10 METAL STRAPS wooo TOP FLAT PAD TUBE TESTER SLEEVE FLAT PAD FIBERBOARD BOX TECHNICAL MANUALS WOOD SHIPPING BOX METAL STRAPS TM6625 316 12 4 Figure 2 Typical packaging modified the MWO number will appear on the front panel near the nomenclature plate c Check the equipment against the packing list When no packing list accompanies the equipment use the table of compo nents a and or the basic issue items list as a general check 11 Section OPERATORS CONTROLS AND INDICATORS 10 Damage From Improper Settings Improper setting of the FILAMENT RANGE switch or incorrect operation of the PRESS TO TEST switches may damage the tube under test Be sure that all the controls and switches are set properly before inserting the tube in the socket 11 Operating Controls and indicators fig 3 a Controls Control ON OFF switch PRESS TO TEST switches P1 through P6 SHORT TEST 6 position rotary switch FUNCTION 3 position rotary switch Note some equipment this switch is marked LEAKAGE VR Seven SELECTORS switches FIL and FIL 12 position rotary switches GRID 12 position rotary
26. to 8 c GRID to 2 d PLATE to 6 SCREEN 0 f CATHODE to 3 g SUPPRESSOR to 0 4 Set the FILAMENT RANGE switch to the 6 3 position 5 Insert the 6SQ7 tube into the OCTAL test socket 6 Set the ON OFF switch to the ON position and allow a l minute warmup 33 7 Adjust the FILAMENT fine control until the FILA MENT VOLTS meter needle indicates 6 3 volts b Short Test To perform the short test 1B on the 6SQ7 tube proceed as follows 1 For the 2 0 aline the dot on the PLATE fine control with the dot on the panel For the TV 2A U and TV 2B U aline the PLATE fine control pointer type knob with the line index marking on the panel 2 Turn the SHORT TEST switch slowly from the OPER position to V W X Y and 7 and back to at the same time tap the tube with a finger and watch the FIL CONT SHORT indicator lamp 3 If the lamp glows continuously or glows during tapping in any of the five positions of the SHORT TEST switch the tube contains a short circuit Discard the tube If there is no short circuit proceed with the next test c Interelement Leakage Test To perform the test for interele ment leakage par 19 on the 6SQ7 tube proceed as follows 1 Set the FUNCTION switch to the LEAK position 2 Set the PLATE meter which is functioning as an ohm meter for this test to zero 19c 3 Turn the SHORT TEST switch slowly from the OPER position
27. to V W X Y and Z at the same time watch for a deflection of the PLATE meter pointer 4 An open circuit or zero leakage between elements will produce no deflection of the PLATE meter pointer A short circuit between elements will produce a full scale deflection of the pointer Read intermediate values on the resistance scale of the PLATE meter If there is no leakage proceed with the next test 5 Set the FUNCTION switch to the TEST position d Filament Continuity Test Proceed as outlined below to de termine whether the filament of the 6SQ7 tube is open par 2D The FIL and FIL SELECTORS switches are set as indicated in the tube test data roll chart at 7 and 8 respectively 1 Set the SHORT TEST switch to the V position 2 Depress the PRESS TO TEST P1 switch 3 If the FIL CONT SHORT lamp glows the filament is good If the lamp does not glow the filament is open Discard the tube If the filament is good however pro ceed to test the transconductance of the triode section 4 Set the SHORT TEST switch to OPER 34 e Measurement of Transconductance To test the transcon ductance of the triode section of the 6SQ7 tube proceed as outlined below The FUNCTION switch and all SELECTORS switches are set as in a 2 through 7 above 1 Set the PLATE SCREEN RANGE switch to the J posi tion 2 Adjust the PLATE fine control until the PLATE meter indicates 225 volts 3 Set the BIAS RANGE switch to the 5
28. when the tube tester is turned off c Do not prolong the testing of tubes with filaments that draw more than 3 amperes d Inspect the bases of seven and nine pin miniature tubes for bent pins before inserting the tube into the test socket If any pins are bent straighten and aline them by inserting the tube into the proper pin straightener mounted on the inside of the cover of the tube tester fig 1 and pressing the tube down firmly 14 Tube Test Sockets and Test Adapters After the controls on the tube tester have been set as directed in the tube test data roll chart par 12 place the tube to be tested in the proper tube test socket listed below a Tube Test Sockets 3 Tube test socket Tube type tested FOUR Four pin standard tubes FIVE Five pin standard tubes LOCTAL Loctal base tubes SIX Six pin standard tubes MIN SEVEN Seven pin miniature tubes SUB MIN EIGHT LONG LEAD Eight pin long lead subminiature tubes TRANSMITTING SEVEN PIN Seven pin transmitting tubes NOVAL Nine pin miniature tubes OCTAL Octal base tubes SEVEN Seven pin standard tubes ACORN
29. 0 volts Accuracy 2 percent error at full scale PLATE meter DC voltmeter Sensitivity 1 000 ohms per volt Voltage ranges 0 to 250 volts dc with redlines at 45 90 180 and 225 0 to 50 volts ac with 20 AC and 35 AC marked in red Ohmmeter ranges 0 1 to 1 0 megohms 2 percent error at full scale SCREEN VOLTS meter Type Dc voltmeter Sensitivity 1 000 ohms per volt Voltage range 0 to 250 volts dc 2 percent error at full scale SIGNAL meter Ac iron vane type ammeter Frequency range 50 to 1 000 cps Meter range 45 ma ac full scale redline at approximately two thirds full scale 35 ma ac Accuracy 5 percent error at full scale PERCENT QUALITY meter transconductance microammeter Sensitivity 10 000 ohms per volt 150 microamperes full scale deflection Percent quality ranges To 60 000 micromhos in equivalent percentage values Accuracy 2 percent error at full scale Number of electron tubes 3 5 Components of Test Set Electron Tube TV 2 U a Componente 1 Test
30. 10B and X13B used i Included line index Not interchangeable with previous models CHAPTER 2 OPERATION Section SERVICE UPON RECEIPT OF EQUIPMENT 8 Unpacking a Packaging Data When packed for shipment the tube tester is cushioned on all surfaces and placed within a water resistant fiberboard box The fireboard box is sealed with water resistant tape and placed within a wooden shipping box Spare tubes lamps and fuses are placed in their designated positions within the tube tester and 8 The technical manuals are packed within a close fitting bag fabricated of waterproof wrapping paper The bag is securely sealed with waterproof pressure sensitive tape The wooden shipping box is strapped only for intertheater ship ment A typical wooden shipping box and its contents are shown in figure 2 1 The inside dimensions of a wooden shipping box that contains a tube tester is approximately 19 by 18 by 1034 inches 2 The outside volume of the tube tester packed in a wooden shipping box is 2 16 cubic feet and weighs 60 pounds b Removing Contents 1 Cut and fold back the metal straps 2 Remove the nails from the top with a nailpuller and remove the wooden top 3 Do not attempt to pry off the top prying may damage the equipment 4 Remove the fiberboard box and cut through the three edges of the box and remove the contents 9 Checking Unpacked Equipment a Check the equipment for any loss or damage
31. 16 b Operate the FUNCTION switch to the TEST position c Operate the PLATE SCREEN RANGE switch to the position specified on the tube test data roll chart Warning Do not touch the top cap of a tube under test after plate voltage has been applied 25 d Adjust the PLATE and SCREEN fine controls until the PLATE and SCREEN VOLTS meters indicate the exact voltages specified on the tube test data roll chart Red calibration marks on both meters facilitate this adjustment e Set the BIAS RANGE switch to the voltage or position specified on the tube test data roll chart f Adjust the BIAS fine control until the GRID BIAS VOLTS meter indicates the exact grid bias voltage specified on the chart g If the bias voltage indication is over 80 percent of full scale at a low plate voltage setting it may be difficult to obtain the required bias voltage In such a case use the next higher setting of the BIAS RANGE switch h Operate the quality SHUNT control to the number given on the tube test data roll chart Adjust the PERCENT QUALITY meter to zero 17 Operate the GM SIGNAL RANGE switch to the position specified for the quality test Adjust the SIGNAL V R fine control until the pointer of the SIGNAL meter is on the red line Depress the PRESS TO TEST P4 switch to its locking posi tion m Read the percent quality for the tube under test on the PERCENT QUALITY meter 1 If the reading is below the minimum
32. L V R fine control __ _____ Depress the appropriate PRESS TO TEST switch to locking position and read per cent quality of tube on PERCENT QUALITY meter Pointer of PERCENT QUALITY meter may deflect slightly PERCENT QUALITY meter exactly zero PERCENT QUALITY meter remains on zero Pointer of PERCENT QUALITY meter deflects indicates Pointer of SIGNAL meter adjusts exactly to redline PERCENT QUALITY meter indication is above minimum requirement of tube as specified on tube test data roll chart Higher echelon repair required Higher echelon repair required Higher echelon repair required Higher echelon repair required Higher echelon repair required 36 Removal and Replacement of Chassis a Removal 1 Unsnap the latches and open the cover of the tube tester 2 Remove the 14 screws that secure the front panel to the case 3 Lift the panel and the chassis from the case by the han dles mounted on the panel 4 Slowly lift the tube tester case upward until it is clear of the chassis b Replacement 1 Position the tube tester case so that the handle is for ward 2 Carefully lower the tube tester into the case Be sure that no wires are caught between the front panel and the edge of the case 3 Replace the screws that secure the front panel to the case Figure 8 Test Set Electron Tube TV 2 U rear 44 3152 9 view of Chassis 37 Tube Replacement When trouble o
33. NT control remains on 90 4 The GM SIGNAL RANGE switch remains on S 5 For the TV 2 U aline the dot on the knob of the GM CENTERING control with the dot on the panel For the TV 2A U and TV 2B U aline the line marking on the GM CENTERING control with the line marking on the panel 6 Depress the PRESS TO TEST P2 switch and read the PERCENT QUALITY meter If the indication is less than the minimum of 25 discard the tube If the indica tion is satisfactory the tube is good 36 31 Stopping Procedure a Set the ON OFF switch to the OFF position b Remove the tube from the test socket Return all controls to their safety positions 15d d Remove the power cord from the power source wind the power cord around the brackets on the panel and insert the plug into the dummy power cord receptacle fig 1 Close the cover of the case and latch the luggage type fasteners 37 CHAPTER 3 OPERATOR S MAINTENANCE 32 General The following is a list of maintenance duties normally performed by the operator of Test Set Electron Tube TV 2 U These procedures do not require special tools or test equipment a Preventive maintenance 33 b Visual inspection 34 Operational check par 35b d Replacement of defective lamps par 3pb e Replacement of defective fuses par 3pa f Checking cable connection g Replacement of defective electron tubes pars 36 and 37 33 Preven
34. ON TUBE TV 2 U TV 2A B U service X inspect x Visual only test X repair X calibrate rebuild ADAPTERS TEST euer cr CABLE ASSEMBLY POWER ELECTRICAL replace CABLE POWER ELECTRICAL replace XY CONNECTOR PLUG ELECTRICAL CAPACTTORS CASE ELECTRONIC EQUIPMENT replace repair CATCH LUGGAGE HANDLE replace HINGE replace Fabricate if required Fabricate if required Fabricate if required Fabricate if required ROLL CHART HOUSING ASSEMBLY replace Fabricate if required repair COVER ELECTRONIC EQUIPMENT replace Fabricate if required repair mu HINGE replace Fabricate if required repair E OPERATING INSTRUCTIONS BH Fabricate if required TV 2 U TV 2A B U 1 1 8 9 MAINTENANCE 157 2ND 3RD STH TOOLS PART OR COMPONENT FUNCTION ECH ECH ECH ECH REQUIRED REMARKS TV 3 TV 2A B U Continued Ex queue m au CHART for tube test setting j X Cr ur uua LUN PIN STRATGHTENER ELECTRON TUBE replace TT Rveilable in tool Kit and TEI CUNT INR Deu c ee SPRING fer chart roller ___ _ 7 ______ _________________ STRIKE CATCH replace X Fabricate if required NN BEN E 00 i ro OO 7l cl
35. Q R or S connects the proper plate and screen grid voltage to be used in the test circuit OFF is no connec tion Permits fine adjustment of plate voltage Permits fine adjustment of screen grid voltage Switch position Action A through E Connects proper ac sig nal voltage to grid of the tube under test Removes signal voltage from grid of tube un der test to permit cali bration of PERCENT QUALITY meter for 13 Control Function Action performance of trans conductance GM test Permits accurate adjustment of ac signal level indicated on the SIGNAL meter In test of voltage regulator tubes permits adjustment of maxi mum and minimum currents through the tube indicated on the PLATE meter When set to the position specified on the tube test data roll chart shunts PER CENT QUALITY meter with proper resistance to perform quality GM test With GM SIGNAL RANGE switch in position F and the quality SHUNT control set in accordance with tube test data permits zero calibration of the PERCENT QUALITY meter for transconductance GM test SIGNAL VR control Quality SHUNT control GM CENTERING control b Indicators Indicator Function PERCENT QUALITY meter Indicates transconductance of amplifier tube under test Indicates ac filament voltage supplied to tube under test Indicates grid bias voltage supplied to tube under test In
36. SAADS 2 TRADOC 2 USAFAS 2 ARADCOM 2 USAARMS 2 ARADCOM 2 USAIS 2 OS Maj Cored 4 USAES 2 LOGCOMD 3 AD 1 except USACC 4 SAAD 30 MDW 1 LBAD 14 Armies 2 TOAD 14 ATAD 10 17 USA Dep 2 29 1 Sig Sec USA Dep 2 29 15 Sig Dep 2 29 16 MAAG 1 29 21 USARMIS 1 29 26 ATS 1 29 26 WRAMC 1 29 36 USAERDAA 1 29 55 USAERDAW 1 29 56 Sig FLDMS 1 29 105 Units org under fol TOE ea 29 109 7 29 134 7 100 29 186 11 16 32 56 11 36 37 11 97 39 51 11 98 55 157 11 117 57 11 302 57 100 11 500 AA AC ARNG State AG 3 USAR None For explanation of abbreviations used see AR 310 50 TECHNICAL M ANUAL DEPARTMENTS OF THE ARMY No 11 6625 316 12 AND THE AIR FORCE TM 11 6625 316 12 TECHNICAL ORDER W ASHINGTON 25 D C 16 March 1961 TEST SETS ELECTRON TUBE TV 2 U TV 2A U Section I HAPTER 2 Section III IV AND TV 2 B U INTRODUCTION Genera LL Forms and records Description and data Purpose and use Technical characteristics Components of Test Set Electron Tube TV 2 U Description of Test Set Electron Tube TV 2 U Differences in models OPERATION Service upon receipt of equipment Unpacking 255 Checking unpacked equipment Operator s controls and indicators Damage from improper settings Operating controls and indicators Tube test data Preliminary operating
37. Set Electron Tube 87 TV 2 U 2 11 6625 816 12 1 9 pin miniature tube straightener 1 7 miniature tube straightener Running spares 6 below b Running Spares Quantity Item Ref symbol 1 Electron tube 83 V1 1 Electron tube 6X4W V2 V3 5 Fuses 3 ampere 250 volts x 1 Fl F2 inches 1 Glow lamp NE 51 11C 12C Note Running spares listed above are stored in designated positions on the inside cover and 25 1 and 8 of the tube tester 6 Description of Test Set Electron Tube TV 2 U 1 a Test Set Electron Tube TV 2 U tube tester is housed in carrying case equipped with a carrying handle two electrical clips for connection to the top cap of a tube under test operating and spare tubes fuses indicating lamps and miniature tube pin straighteners The cover is secured to the case by luggage type fasteners Power cord brackets and a dummy power cord recep tacle on the panel are used to secure and store the power cable Tube test data is given on a roll chart the roll chart case is mounted inside the cover of the tube tester A condensed summary of operating instructions also is mounted inside the cover of the tube tester The cover is hinged by slip hinges and can be removed from the case Two handles attached to the panel permit easy lifting of the tube tester from the case b All indicating meters
38. Sree A 202 LEG 0 pcm E EE TH UMUBYAL PERFORMANCE OR CONDITION WEEKLY dA AA ITEMS FOR 20 AND 3D INSPECTIONS 9 INSPECT COROS AO WINE fon ones ane CUTS KINKS ORTE MIORATION T AMO P 2 CHECK ee oosanass OF EXTERIOR ITEMS SUCH MANDLES EA Tenes INSPECT METERS FOR DAMAGED Ase AND m on page 4 if moro apace x META ess cp KLHELON MAINTENANCE FOR REPL BCE MENT TM6625 316 12 7 Figure 7 DA 11 266 pages 2 and 3 as used by operator 34 Visual Inspection a When the equipment fails to perform properly turn off the power and check for the conditions listed below Do not check any item with the power on 1 Worn broken or disconnected power cord or connector 2 Improperly connected electrical clips 3 Burned out or improperly seated fuses 4 Defective or loose switch knobs Operate the switches to be sure there is a definite stop at each position indi cated on the panel 5 Loose control knobs Check the knobs by hand 6 Improperly seated indicator lamps b If the above checks do not locate the trouble proceed to the operational checklist par 33 35 Operational Checklist d General The operational checklist provides a procedure for systematically checking equipment performanc
39. TM 11 6625 316 12 DEPARTMENT OF THE ARMY TECHNICAL MANUAL OPERATOR AND ORGANIZATIONAL MAINTENANCE MANUAL TEST SETS ELECTRON TUBE TV 2 U TV 2A U AND TV 2B U This copy is a reprint which includes current pages from Changes 2 through 3 HEADQUARTERS DEPARTMENT OF THE ARMY MARCH 1961 WARNING DANGEROUS VOLTAGES EXIST IN THIS EQUIPMENT Be careful when working on the 290 volt plate and screen supply circuits or on the 115 volt ac line connections DON T TAKE CHANCES Change now in force 2 TM 11 6625 316 12 2 TECHNICAL MANUAL Operator and Organizational Maintenance Manual TEST SETS ELECTRON TUBE TV 2 U TV 2A U TV 2B U AND TV 2C U DEPARTMENT OF THE ARMY WASHINGTON 25 D C 11 September 1963 TM 11 6625 316 12 16 March 1961 as changed by C 1 18 Sep 1961 is changed as indicated so that the manual also applies to the following equipment Nomenclature Orda Ma Test Set Electron Tube TV 2C U 4376 61 The title of the manual is changed as shown above Page 5 paragraph 1 as changed by C 1 18 Sep 1961 Subparagraph a Delete the first sentence and substitute This manual describes Test Sets Electron Tube TV 2 U TV 2A U TV 2B U and TV 2C U fig 1 and covers operation and the operator s and organizational maintenance Subparagraph b last line After TV 2B U add and TV 2C U Add paragraph 1 1 after paragraph 1 TM 11 6625 316 12 HEADQUARTERS CHANGES N
40. The exact procedure for repackaging depends on the material available and the conditions under which the equipment is to be shipped or stored Adapt the procedures outlined below whenever circumstances permit The information concerning the original packaging and 9 will also be helpful a Material Requirements The following materials are required for packaging the tube tester For stock numbers of materials consult SB 38 100 Material Quantity Waterproof wrapping paper 18 sq ft Fiberboard corrugated single face flexible 35 sq ft pressure sensitive adhesive waterproof 3 inch 12 ft Tape paper gummed sealing and securing 3 inch _ 10 ft Strapping flat steel 5 8 x 0 02 inch 18 ft Strapping seals A 2 each Wooden shipping box 19 x 18 x 10 58 inches inside dimen 1 ea sions 55 b Packaging 1 Package each technical manual within a close fitting bag fabricated of waterproof paper Seal each bag with waterproof pressure sensitive tape 2 Running spares are stored in designated positions on the inside cover and chassis figs 4 and 8 of the tube tester 3 Package the tube tester in a double wrap of flexible corrugated fiberboard Secure the ends of the package with waterproof pressure sensitive tape METAL STRAPS WOOD TOP TECHNICAL MANUALS OEE FIBERBOARD TUBE TESTER FIBERBOARD
41. V 2A U and TV 2B U aline the PLATE fine control pointer type knob with the line index marking on the panel This assures that the correct voltage will be applied to the short test circuit c Turn the SHORT TEST switch slowly from the OPER position to V W X Y and Z and back to OPER at the same time tap the tube with a finger and watch the FIL CONT SHORT indicator lamp Caution Do not tap the tubes listed below when testing for short circuited elements Tapping may damage the tube 1A5GT 1LH4 1A7GT 1LN5 1C5GT 1P5GT 1G4GT 1Q5QT 1G6GT 1S4 1H5GT 155 114 1T4 1LA4 1T5GT 1LA6 1U4 1LB4 1U5 1LD5 3A4 1LE3 3A5 23 3A6GT 3Q4 3B7 3050 3D6 384 3LF4 3V4 d If the lamp burns continuously or glows during tapping in any one of the five positions of the SHORT TEST switch the tube contains short circuited electrodes Discard the tube unless an exception is noted on the tube test data roll chart e Disregard a momentary flash of the FIL CONT SHORT indicator lamp while the SHORT TEST switch is being moved from one position to the next This flashing usually is caused by the charging of a capacitor in the test circuit Note Some tubes normally test as shorted when the SHORT TEST switch is in certain positions Before discarding a tube that shows a short check the tube test data roll chart NOTES column for information on normal short indications f When the test is completed set the ON OFF switch to the OFF position remov
42. ___________ Replace fuses F1 and F2 par 59a Higher echelon repair require Higher echelon repair required Replace PILOT lamp par a Pointer of FILAMENT VOLTS meter first indicates approximate voltage selected and then indicates exact voltage selected Pointer of SIGNAL meter can be adjusted to redline for each position of range switch PILOT lamp goes out _________________ PILOT lamp lights _____________________ Higher echelon repair required Higher echelon repair required Higher echelon repair required FIL CONT SHORT lamp lights _________ Replace FIL CONT SHORT lamp 895 Higher echelon repair required FILAMENT VOLTS meter indicates exact Higher echelon repair required voltage selected PLATE and SCREEN VOLTS meter indi Replace tubes V1 and V3 con cates exact voltage indicated for tube on tube test data roll chart 36 ana 37 Higher echelon repair required GRID BIAS VOLTS meter indicates exact voltage indicated for tube on tube test data roll chart Replace tube V2 36 and 37 Higher echelon repair required Set quality SHUNT control to position indi cated for tube on tube test data roll chart and set GM SIGNAL RANGE switch to position F Depress PRESS TO TEST P4 switch to locking position Adjust GM CENTERING control Release PRESS TO TEST switch _____ Set GM SIGNAL RANGE switch to posi tion specified for tube on tube test data roll chart Adjust SIGNA
43. aily Preventive Maintenance Checks and Services Chart he Item Procedure References 1 Completeness Check equipment for com Appx III pleteness and general condition 2 Exterior surfaces Clean exterior surfaces of Par 33 4 the equipment 3 Glass Inspect front panel glass None windows for damaged housing broken glass physical damage dust or moisture 4 Fuses Check to determine that Par 39 fuses are of the correct rating and are not de fective 5 Meters During operation item None 8 be alert for sticking meter movement 6 Lamps During operation item 39 8 observe that the lamps are not defective No Item Procedure References 7 Knobs switches and During operation item None controls 8 observe that the mechanical action of each knob switch and control is smooth and free of external or in ternal binding 8 Operation Operate the equipment in Par 35 accordance with para graph 35 33 3 Weekly Preventive Maintenance and Services Chart Jtem Procedure References Cables Inspect external cables for None cuts cracked or gouged jackets fraying or kinks Hardware Inspect all exterior hard None ware for looseness and damage The tube tester cover carrying handle hinges and all screws must be tight and not damaged Preservation
44. be under test All other switches and controls should be in their safety positions par 134 c Insert the ballast tube into the appropriate socket d Turn the ON OFF power switch to the ON position Turn the SHORT TEST switch to the position f Depress and hold down the PRESS TO TEST switch Operate the FIL SELECTORS switch to each of the positions specified in the tube test data roll chart The FIL CONT SHORT lamp should glow in every position noted If it does not discard the ballast tube g Repeat the procedures indicated in b through fabove for each listing of the tube 29 Indicator Lamp Test To check an indicator lamp or other lamps with miniature bayonet or screw type bases proceed as follows a OPERATE THE FIL SELECTORS switch to position 2 b Operate the FIL SELECTORS switch to position 7 c Operate the FILAMENT RANGE switch to the correct voltage for the lamp under test This voltage usually is marked on the lamp base d Operate the ON OFF power switch to the ON position e Adjust the FILAMENT fine control until the FILAMENT VOLTS meter indicates the exact voltage specified for the lamp 32 f Insert and hold the lamp in the center of the SEVEN socket If the lamp is good it will light with normal brilliancy Caution Do not test glow lamps with the TV 2 U unless these lamps are supplied with a current limiting series resistor When the test is completed operate the ON OFF
45. brief identifying data for each item are listed in this column When requisitioning enter the nomencla ture and description 5 Unit of issue The unit of issue is the supply term by which the individual item is counted for procurement storage requisitioning allowances and issue purposes 6 Expendability Expendable items are indicated by the letter X nonexpendable items are indicated by NX 7 Quantity authorized Under Items Comprising an Operable Equipment the column lists the quantity of items supplied for the initial operation of the equip ment Under Running Spares and Accessory Items the quantities listed are those issued initially with the equipment as spare parts The quantities are authorized to be kept on hand by the operator for maintenance of the equipment 8 Illustration The Item No column lists the reference symbols used for identification of the items in the illustra tion or text of the manual The numbers in the Figure 61 No column refer to the illustrations where the part is shown 2 Critical Items A zero slash 8 in the Description column indicates items that are expected to fail during the first year also items that will make the equipment inoperative if they fail 62 U S GOVERNMENT PRINTING OFFICE 1989 242 451 5116 2 3 9 MAINTENANCE 1ST 2NO TOOLS PART OR COMPONENT REMARKS FUNCTION ECH ECH 3 REQUIRED TEST SET ELECTR
46. ccurs check the power cord connection and the control settings before removing any tubes If tube failure is suspected use the tube substitution method a below to check the tubes Caution Do not rock or rotate a tube when removing it from a socket pull it straight out with a tube puller a Tube Substitution Method Replace a suspected tube b below with a new tube If the equipment still does not work remove the new tube and put back the original tube Repeat this procedure with each suspected tube until the defective tube is located b Replacing Tubes in Test Set Electron Tube TV 2 U Check the tubes in the tube tester as follows 1 Remove the chassis from the case 34 2 Remove the shields of the 6X4 or 6X4W tubes V2 and V3 by pressing down on the shield and rotating coun terclockwise until it is released 3 Release the retainer of the 83 tube by pressing down on the spring which engages the threaded portion of the supporting stud remove the retainer from the tube 4 Use a tube puller to remove the tube If a tube puller is not available allow the tube to cool and then grasp it and pull the tube straight up 5 If a tube marking has become illegible label the tube as soon as it is removed 6 Replace the tube a above with one of the running spares 7 Set the tube or a replacement in the socket and secure it by replacing tube retainer or shield 8 Replace the chassis
47. d 25 Procedure for Reading Plate Current Less Than 50 Milliam peres of Tubes a Perform the operations indicated in paragraphs 15 and 16 b Set all SELECTORS switches as indicated on the tube test data roll chart with the exception of the PLATE and SCREEN SELECTORS switches Set the PLATE selector switch to the position d Set the SCREEN SELECTORS switch to the position desig 29 ated for the PLATE SELECTORS switch on the tube test data roll chart e Set the GM SIGNAL RANGE switch to the F position f Adjust the SCREEN fine control until the voltage specified on the tube test data roll chart for the PLATE meter is indicated on the SCREEN VOLTS meter Note It may be necessary to set the PLATE SCREEN RANGE switch to a new setting moving the switch in a counterclockwise direction so that the SCREEN VOLTS meter can indicate the voltage specified for the PLATE meter g Adjust all other fine controls as required on the tube test data roll chart for the tube under test h Turn the SIGNAL V R fine control to its maximum counter clockwise position Set the FUNCTION switch to the VR position j Set the quality SHUNT control to 0 k Depress the PRESS TO TEST P5 switch Be sure the proper voltages for the tube being tested appear on all other meters Note the reading on the O to 50 milliampere ma scale on the PLATE meter Release the PRESS TO TEST P5 switch m When the test is complet
48. d straightening f Rebuild To restore an item to a standard as near as possible to original or new condition in appearance performance and life expectancy This is accomplished 59 through the maintenance technique of complete dis assembly of the item inspection of all parts or com ponents repair or replacement of worn or unservice able elements using original manufacturing toler ances and or specifications and subsequent reassembly of the item 3 Ist 2d 3rd 4th 5th echelon The symbol X indicates the echelon responsible for performing that particular main tenance operation but does not necessarily indicate that repair parts will be stocked at that level Echelons higher than the echelon marked by X are authorized to perform the indicated operation 4 Tools required This column indicates codes assigned to each individual tool equipment test equipment and maintenance equipment referenced The grouping of codes in this column of the maintenance allocation chart indicates the tool test and maintenance equipment re quired to perform the maintenance function 5 Remarks Entries in this column will be utilized when necessary to clarify any of the data cited in the preceding columns c Columns in the allocation of tools for maintenance functions are as follows 1 Tools required for maintenance functions This column lists tools test and maintenance equipment required to perform the maintenance f
49. diate operation condition must have monthly preventive maintenance checks and services performed on it Equipment in limited storage requires service before operation does not require monthly preventive maintenance AT ANY as 400 4 1 42 4 42 1 Monthly Preventive Maintenance Checks and Services Chart Bequence No Item Procedure References 1 Publications Inspect manual for com DA Pam 310 4 pleteness and to see if it is in usable condition without missing pages Be sure that all Changes to the manual are on hand 2 Modification work Check to see that all DA Pam 310 4 orders URGENT MWO s have been applied and that all NORMAL MWO s have becn scheduled 3 Completeness Check equipment for com Appx III and TM pleteness and general 11 6625 316 condition 20P 4 Cleanliness Clean the exterior surfaces Par 334 of the equipment 5 Preservation Inspect the equipment to Par 42 2 determine that it is free of bare spots rust and corrosion 6 Glass Inspect front panel glass None windows for damaged housing broken glass physical damage dust or moisture 7 Fuses Check to determine that Par 39 fuses are of the correct rating and are not de fective 8 Cables Inspect external and in None ternal cables for cuta cracked or gouged jack 3 ets fraying or ki
50. dicates plate voltage supplied to tube under test Indicates screen grid voltage supplied to tube under test Indicates ac signal level supplied to tube under test Glows when tube tester is connected to ac power source and power ON OFF switch is in ON position Glows to indicate short circuited ele ments or filament continuity in tube under test FILAMENT VOLTS meter GRID BIAS VOLTS meter PLATE meter SCREEN VOLTS meter SIGNAL meter PILOT lamp FIL CONT SHORT lamp Note On some equipments this lamp is marked SHORT 14 GT SCREEN 2 PL ATE SCREEI RANGE Sk oS 3 PLOT o o o Ab o m PRESS TO TEST HS 50 00 CYCLES 0990000 f 099999 Figure 3 Test set Electron Tube TV 2 U front panel edm tane Ty TE TM6EE2Z5 316 12 2 12 Tube Test Data Tube test data in roll chart form is mounted in a case inside the cover of Test Set Electron Tube TV 2 U fig 1 The tube test data roll chart has left and right hand sections The tube types appear in ascending numerical and alphabetical order from top to bottom in the left hand section and from bottom to top in the right hand section Designations on the tube test data roll chart housing which appear in duplicate o
51. e All corrective measures that the operator can perform are given in the Correc tive measures column When using the checklist start at step and follow each step in order If the corrective measures indicated do not repair the equipment troubleshooting is required by higher echelon Note on the repair tag how the equipment performed and the corrective measures taken Perform the steps in b below 41 cv b Operational Checklist Action Set the ON OFF switch to ON _________ Set FILAMENT RANGE switch to several voltages and adjust FILAMENT fine control for each of the voltages selected Set GM SIGNAL RANGE switch to each position and adjust SIGNAL V R fine control for each position Set the ON OFF switch to OFF ________ Set all switches to positions specified on tube test data roll chart for available tube known to be in good condition insert tube in appropriate tube socket and set the ON OFF switch to ON Set SHORT TEST switch to V position and depress PRESS TO TEST P1 switch Adjust FILAMENT fine control __________ Set PLATE SCREEN RANGE switch to position specified for tube on tube test data roll chart and adjust PLATE and SCREEN fine controls Set BIAS RANGE switch to position speci fied for tube on tube test data roll chart and adjust BIAS fine control Normal indication Corrective measure T PILOT lamp lights _
52. e the tube under test from the test socket and return all switches and controls to their safety positions 158 19 Interelement Leakage Test Follow the test procedure in through below to determine the interelement leakage LK in megohms between electrodes of the tube under test a Perform the operations described in paragraphs 15 and 16 b Operate the FUNCTION switch to the LEAK position This position connects the PLATE meter into the circuit to serve as an ohmmeter for this test only c Set the ohmmeter PLATE meter to zero as follows 1 Operate the SHORT TEST switch to the V position 2 Turn the PLATE fine control to its maximum counter clockwise position 3 Depress the PRESS TO TEST switch 4 With the P1 switch held in its depressed position adjust the PLATE fine control until the pointer of the PLATE meter indicates zero 250 on center scale on the ohm meter top scale 5 Release the switch d Operate the SHORT TEST switch slowly from the OPER position to positions V W X Y and Z at the same time watch for a deflection of the PLATE meter pointer 24 1 An open circuit or infinite leakage between elements will produce no deflection of the PLATE meter pointer 2 A short circuit between two elements will produce a full scale deflection of the PLATE meter pointer Note Where the NOTES column indicates a short circuit full scale deflection will appear at those settings
53. ed set the ON OFF power switch to the OFF position remove the tube under test from the test socket and return all switches and controls to their safety posi tions par 15d 26 Thyratron Test Use the following procedure to determine the firing potential of thyratron TH tubes Thyratrons are also called gas triodes or grid glow tubes The firing potential may be defined as the grid voltage at which the tube begins to conduct a Perform the operations indicated in paragraphs 5 and 18 b Set the FUNCTION switch to the VR position c Set the PLATE SCREEN RANGE switch to the position specified on the tube test data roll chart d Set the quality SHUNT control to the number specified on the tube test data roll chart e Set the SIGNAL V R fine control to its extreme clockwise maximum position f Depress and hold down the PRESS TO TEST P5 switch Note the current through the tube as indicated on the PLATE meter and note the reading of the PERCENT QUALITY meter 30 Adjust the SCREEN fine control until the SCREEN VOLTS meter indicates the voltage specified on the tube test data roll chart 12 h Set the BIAS fine control to its extreme clockwise mum position With the PRESS TO TEST P5 switch held in its operated position gradually reduce the bias voltage by adjusting the BIAS fine control until the tube strikes its firing potential The firing potential is indicated by a sudden increase i
54. est Use the following procedure to test the emission EM of recti fier tubes diode detectors and multielement tubes 27 a Perform the operations described in and 16 b Operate the FUNCTION switch to the TEST position c Set the PLATE SCREEN RANGE switch to the position specified on the tube test data roll chart d Adjust the PLATE fine control until the PLATE meter in dicates the exact voltage specified on the tube test data roll chart Red calibration marks on the meter scales facilitate this adjust ment e Operate the quality SHUNT control to the number specified on the tube test data roll chart f Operate the GM SIGNAL RANGE switch to the position noted on the tube test data roll chart For the 2 0 aline the dot on the knob of the GM CEN TERING control with the dot on the panel For the TV 2A U and TV 213 U aline the line marking on the GM CENTERING knob with the line marking on the panel h If the tube under test is a diode hold down the PRESS TO TEST P2 switch If the tube under test is a multigrid tube hold down both the P2 and P3 switches i Read the PERCENT QUALITY meter If the indication is below the minimum limit given on the tube test data roll chart discard the tube Tubes that border on the minimum limit may be usable but should be replaced soon Note When testing some diodes the PERCENT QUALITY meter will deflect off scale This is a normal condition when the emission of the tube is far
55. fine control BIAS RANGE 8 position rotary switch BIAS fine control PLATE SCREEN RANGE 12 position rotary switch PLATE fine control SCREEN fine control GM SIGNAL RANGE 6 position rotary switch Function When set to one of positions 1 to 9 con nects plate voltage to correspondingly numbered base pin of tube under test 15 no connection In position or B connects plate voltage to A or B electrical clip When set to one of positions 1 to 9 con nects screen voltage to correspondingly numbered base pin of tube under test 0 is no connection In position or B connects screen voltage to A or B electrical clip When set to one of positions 1 to 9 con nects desired test circuit to cathode of tube under test through correspond ingly numbered base pin or in position A or B connects through A or B elec trical clip When set to one of positions 1 to 9 con nects desired test circuit to suppressor grid of tube under test through cor respondingly numbered base pin or in position A or B through A or B elec trical clip Selects proper filament voltage between OFF 0 volt and 117 117 volts ac Permits fine adjustment of filament volt age applied to tube under test Selects 5 10 or 50 volts fixed bias or connects biasing resistors as required when in positions A B C D or E Permits fine adjustment of bias voltage When in positions G H J K M N P
56. good ________________ Replace tubes V1 and V3 pars 36 and 37 For TV 2B U only replace test adap ter X3B ur H Higher echelon repair required Replace tube V2 omh 36 and 37 For TV 2B U only replace test adap ter X3B Higher echelon repair require Higher echelon repair required Higher echelon repair required Higher echelon repair required Higher echelon repair required Replace test adapter X7B Higher echelon repair require EQUIP PERF Step 17 18 19 20 Action or condition For TV 2B U only insert a 7 pin minia ture tube known to be in good condi tion into the MIN SEVEN tube socket and test as specified on tube test data roll chart Insert an 8 pin long lead subminiature tube known to be in good condition into the SUB MIN EIGHT LONG LEAD tube socket and test as specified on tube test data roll chart Insert amp tube that has external connec tions for plate and grid and known to be good into appropriate tube socket and test as specified on tube test data roll ehart Set ON OFF switch to OFF Normal indication Corrective measure Tube checks good ____________ ____ Replace test adapter X10B par Tube checks good Tube checks good 5 Higher echelon repair per Replace test adapter X13B par jo Higher echelon repair require Replace electrical clips A and B Higher echelon repair required SPACING SLEEVE XI38
57. h the P5 switch held in its operated position adjust the SIGNAL V R PLATE and SCREEN fine controls until the VR 50 MA scale of the PLATE meter indicates the minimum load current through the tube as specified on the tube test data roll chart Note the reading of the PERCENT QUALITY meter h With the PRESS TO TEST P5 switch still held in its oper ated position adjust the SIGNAL V R fine control until the VR 50 MA scale of the PLATE meter indicates the maximum load current specified on the chart Note the reading of the PERCENT QUALITY meter i Determine the regulating ability of a tube by taking the difference between the maximum and minimum load currents through the tube as read on the PERCENT QUALITY meter If the difference between the two readings is greater than the maximum difference indicated on the tube test data roll chart discard the tube Note A quality SHUNT control setting of 50 is specified for many voltage regulator tubes When so specified the reading on the PERCENT QUALITY meter indicates directly the voltage drop across the tube under test The difference between the voltage drop at minimum and maximum load currents as read on the PERCENT QUALITY meter then is equal to the regulating ability of the tube in volts j When the test is completed set the ON OFF power switch to the OFF position remove the tube under test from the test socket and return all switches and controls to their safety posi tions par 15
58. hipment Report DISREP SF 361 Fill out and forward Discrepancy in Shipment Report DISREP SF 361 as prescribed in AR 55 38 NAVSUPINST 4610 33 AFM 75 18 MCO P4610 19A and DSAR 4500 15 2 1 Reporting of Errors The reporting of errors omissions and recommendations for im proving this Duplication by the individual user is encouraged 1 Reports should be submitted on DA Form 2028 Recommended Changes to Publications and Blank Forms and forwarded direct to Commander US Army Electronics Command ATTN AMSEL MA C Fort Monmouth NJ 07703 Page 7 paragraph 5 Delete and substitute 5 Item Comprising an Operable Equipment Test Sets Electron Tube TV 2 U TV 2A U TV 2B U and TV 2C U 6625 669 0263 each comprises an operable equip ment Page 11 paragraph 9c Delete the second sentence Page 61 appendix III Delete appendix III in it s entirety in eluding final foldout entitled Items Comprising an Operable Equipment By Order of the Secretary of the Army CREIGHTON W ABRAMS General United States Army Official Chief of Staff VERNE L BOWERS Major General United States Army The Adjutant General Distribution Active Army USASA 2 Corps 2 CNGB 1 HISA Ft Monmouth 18 ACSC E 2 Ft Gordon 10 Dir of Trans 1 Ft Huachuca 10 COE 1 Ft Carson 5 TSG 1 Ft Richardson ECOM Oft 2 USAARENBD 1 WSMR 1 USAMB 10 Svc Colleges 1 AMC 1 USASESS 15 MICOM 2 USAINTCS 3 TECOM 2 U
59. hrough 33 4 cover routine systematic care and cleaning essential to proper up keep and operation of the equipment 2 6 Preventive Maintenance Checks and Services The preventive maintenance checks and services charts par 33 2 and 33 3 outline functions to be performed at specific intervals These checks and serv ices are to maintain Army electronic equipment in a combat serviceable condition that is in good general physical condition and in good operating condition To assist operators in maintaining combat service ability the chart indicates what to check how to check and what the normal conditions are The references column lists the illustrations paragraphs or manuals that contain detailed repair or replacement pro cedures If the defect cannot be remedied by the operator higher echelon maintenance or repair is required Records and reports of these checks and services must be made in accordance with the requirements set forth in TM 38 750 Add paragraphs 33 1 through 33 4 33 1 Preventive Maintenance Checks and Services Periods Preventive maintenance checks and services of Test Sets Electron Tube TV 2 U are required daily and weekly Paragraphs 33 2 and 33 3 specify the items to be checked and serviced In addition to the routine daily and weekly checks and services the equipment should be rechecked and serviced immediately before going on a mission and as soon after completion of the mission as possible 33 2 D
60. in excess of that required by tube specifications If the need for balancing such a diode is present reduce the setting of the quality SHUNT control until the PERCENT QUALITY meter reads 100 Observe the new shunt setting and use this setting to compare diodes of the same type j When the test is completed set the ON OFF switch to the OFF position remove the tube under test from the test socket and return all switches and controls to their safety positions 134 24 Voltage Regulator and Recifier Test Use the following procedure to test the voltage regulator VR and gas rectifier tubes under minimum and maximum load con ditions The regulating ability of the tube is computed from the test results For testing thyratron tubes refer td paragraph 26 a Perform the operations described in and 16 Set the FILAMENT RANGE and BIAS RANGE switches to the positions indicated in the tube test data roll chart b Set the PLATE SCREEN RANGE switch to the position specified on the tube test data roll chart 28 c Set the quality SHUNT control to the number specified on the tube test data roll chart d Set the FUNCTION switch to the VR position e Turn the SIGNAL V R and the BIAS fine controls to their extreme counterclockwise zero positions f Depress and hold down the PRESS TO TEST P5 switch Note the current through the tube as indicated on the PLATE meter and note the reading of the PERCENT QUALITY meter g Wit
61. l the meter pointer is on the red calibration line on the appropriate scale h If the line voltage is low it may not be possible to adjust the FILAMENT fine control to indicate the specified filament voltage When this condition exists turn the FILAMENT 22 RANGE switch to the next higher position and then adjust the control until the correct voltage is indicated on the meter i If the line voltage is high and it is not possible to adjust the FILAMENT fine control to indicate the specified voltage turn the FILAMENT RANGE switch to the next lower position and then adjust the control until the correct voltage is indicated on the meter 17 Zero Adjustment of PERCENT QUALITY Meter When the procedures paragraph 16 been completed adjust the PERCENT QUALITY meter to zero This adjustment should be made before testing any tube for transconductance GM as follows a Turn the GM SIGNAL RANGE switch to the F position b Depress the PRESS TO TEST P4 switch to its locking posi tion Reset the controls to give the exact meter readings specified in the METER SETTING columns of the tube test data roll chart c Adjust the GM CENTERING control until the pointer of the PERCENT QUALITY meter is set exactly to zero on the scale d Release the P4 switch 18 Short Test a Perform the operations described in paragraphs I5 and 16 b For the TV 2 U aline the dot on the PLATE fine control with the dot on the panel For T
62. lacement of 5____________ 36 Tube replacement ___ 2 2 Preferred typetubes__ 38 45 Replacement of fuses and lamps ____________ 39 46 4 ORGANIZATIONAL MAINTENANCE General ________________________ Tools and materials require 2 2 Preventive maintenance _ _ _______ Visual inspection 2 Equipment performance checklist _ 2 Replacement of test adapters _______________ 5 SHIPMENT LIMITED STORAGE AND DEMOLITION TO PREVENT ENEMY USE Section I Shipment and limited storage Disassembly of equipment ________________ _ 46 55 Repackaging for shipment or limited storage 47 55 II Demolition of materiel to prevent enemy use Authority for demolition u Methods of destruction _ ___ _ _ _ L REFERENCES dE EE lt oo NI SPER ONS Figure 1 Test Set Electron Tube TV 2 U less running spares CHAPTER 1 INTRODUCTION Section I GENERAL 1 Scope a This manual describes Test Sets Electron Tube TV 2 U TV 2A U and TV 2B U fig _1 and covers operation and the operator s and organizational maintenance It includes instruc tions for operation under usual conditions for cleaning and in spection of the equipment and for replacement of parts available to first and second echelon maintenance b Official nomenclature followed by is used to indicate all models of the equipment item covered in this manual Thus Test Set Electron Tube 2 U represents Test Sets
63. ll controls and switches are in their power cord safety positions as follows Switch or control Safety position ON OFF OFF SHORT TEST OPER FUNCTION TEST PRESS TO TEST PI P2 P3 P4 Neutral P5 and P6 FIL and FIL 0 GRID 0 PLATE 0 SCREEN 0 CATHODE 0 SUPPRESSOR 0 FILAMENT RANGE OFF FILAMENT fine control Extreme counterclockwise BIAS RANGE 50 BIAS fine control Extreme counterclockwise PLATE SCREEN RANGE OFF PLATE fine control Extreme counterclockwise SCREEN fine control Extreme counterclockwise SIGNAL VR fine control Extreme counterclockwise GM SIGNAL RANGE SHUNT control 0 GM CENTERING control Midposition as shown by alinement of dot on knob with that on panel e Condensed operating instructions are mounted inside the cover of the tube tester fig 1 Revise the condensed operating instructions for
64. month It is to be used Prevent Maintenance check tist for Signal equipment in actual use of for a checi equipment prior to issue 1 For detailed Preventive Maintenance instructions see The Technical Manual in TM 11 for the equipment See DA Pamphiet Number 310 4 b Tbe Supply Bulletin SB 11 100 series for the equipment See DA Pamphlet Number 310 4 The Department of tbe Army Lubrication Order See DA Pamphlet Number 310 4 2 The following action will be taken by either the Communications Officer Chief for ist echelon or the Inspector foc higher echelom Enter Equipment Nomenclature end Serial Number b Strike out iteme thet do not apply to the equipment 3 Operator Inepector will enter in the columns entitled CONDITION on the proper line notation regarding the condition ualng aymbols specified under LEGEND 4 After operator completes each daily inspection he will initial over the appropriste dates under Condition for Month then return form to his supervisor SIGNATURE U 5 GOVERNMENT PROVING OFFICE 1957 O A27198 DA roe 11 266 TM6625 316 12 6 Figure 6 DA Form 11 266 pages 1 and 4 0r few merking conditions DAILY CONDITION FOR MONTH OF Re mast o Replacement required X 2 Lootanen or ver oe 11 A
65. n load current shown on the PLATE meter and by a sudden decrease on the PERCENT QUALITY meter Note The tube will not conduct as indicated by an increase in load current shown by the PLATE meter until the critical grid bias voltage is reached For example for a type 2D21W or type 2050W tube the bias voltage at which conduction occurs should be between 1 5 and 3 0 volts j The voltage at which the tube strikes is read on the GRID BIAS VOLTS meter Record the grid voltage at the instant and at the point that the pointer starts to deflect This is the striking voltage of the tube under test Repeat the test to confirm the read ing Minimum limits for striking voltages of thyratrons are given on the tube test data roll chart k When the test is completed set the ON OFF power switch to the OFF position remove the tube under test from the test socket and return all switches and controls to their safety posi tions par 154 27 Electron Ray Indicator Test There are two types of electron ray ER indicator tubes that can be tested with the TV 2 U Type 605 and similar tubes have a triode section and a single indicator one shadow Type 6AF6 and similar tubes have no triode section but have twin indicators dual shadow Follow the procedure below to check the opening and closing action of the eyes only Indicators with triode sections also must be tested for emission i below a Perform the operations indicated in paragraphs 15
66. ner and shield The operating instructions for the tube tester are contained in paragraphs 13 through 31 41 Tools and Materials Required The tools and materials required for organizational maintenance are as follows a Tools The only tools required are those tools normally avail able to the repairman user because of his assigned mission b Materials 1 Cleaning compound 2 Cleaning cloth 3 Sandpaper fine 42 Preventive Maintenance DA Form 11 266 DA Form 11 266 fig is a preventive maintenance checklist to be used by the second echelon Items not applicable to the equipment are lined out in the figure References to the ITEM block in the figure are to paragraphs that contain additional maintenance information pertinent to the particular item Instructions for the use of the form appear on the form b Items The information shown in this subparagraph is sup plementary to DA Form 11 266 The item numbers correspond to the ITEM numbers on the form Warning Disconnect all power before performing the follow ing operations After power is disconnected some capacitors still may retain dangerous voltages Before touching exposed electri cal parts short circuit the parts to ground When maintenance is completed replace the equipment in its case reconnect the power and check for satisfactory operation 47 Item Maintenance procedures 12 See that the electron tube shields for V2 and V3 are
67. nks 9 Hardware Inspect all exterior and None interior hardware for looseness and damage The tube tester cover carrying handle and all bolts and screws must be tight and not dam aged Iten Drovectire References 10 Meters None During operation item 13 be alert for sticking meter movement During operation item 13 observe that the lamps are not defective 12 Knobs switches and During operation item controls 18 observe that the mechanical action of each knob switch and cortrol is smooth and free of external and in ternal binding Operate the equipment in accordance with para graph 44 11 Lamps Par 39 None 13 Operation 44 42 2 Touchup Painting Instructions Clean rust and corrosion from metal surfaccs by lightly sanding them with fine sandpaper Brush two thin coats of paint on the bare metal to protect it from further corrosion Refer to the applicable cleaning and refinishing practices specified in TM 9 213 Page 58 appendix I Add the following references DA Pam 310 4 Index of Technical Manuals Technical Bulle tins Supply Bulletins Lubrication Orders and Modification Work Orders TM 9 213 Painting Instructions for Field Use TM 11 6625 316 20P Organizational Maintenance Repair Parts and Special Tools List Test Sets Electron Tube TV 2 U TV 2A U and TV 2B U TM 38
68. o 2 1 1 Index of Publications Refer to the latest issue of DA Pam 310 4 to determine whether there are new editions changes or additional publications pertaining to this equipment DA Pam 310 4 is a current index of technical manuals technical bulletins supply bulletins lubrication orders and modification work orders that are available through publications supply channels The index lists the individual parts 10 20 35P ete and the latest changes to and revisions of each equipment publication Delete paragraph 2 and substitute 2 Forms and Records a Reports of Maintenance and Unsatisfactory Equipment Use equipment forms and records in accordance with instructions in TM 38 750 This change supersedes 1 18 September 1961 b Report of Damaged or Improper Shipment Fill out and forward DD Form 6 Report of Damaged or Improper Shipment as prescribed in AR 700 58 Army NAVSANDA Publication 378 Navy and AFR 71 4 Air Force Reporting of Equipment Manual Improvements The direct report ing by the individual user of errors omissions and recommendations for improving this manual is authorized and encouraged DA Form 2028 Recommended changes to DA technical manual parts list or sup ply manual 7 8 or 9 will be used for reporting these improvements This form will be completed in triplicate using pencil pen or type writer The original and one copy will be forwarded direct to Com manding Officer
69. power switch to the OFF position and return the FIL and FIL SELECTORS switches the FILAMENT RANGE switch and the FILAMENT fine control to their safety positions par ibd 30 Complete Tube Test As an example of a complete tube test assume 6507 tube is to be tested The 6SQ7 tube is a twin diode high mu triode used as a combined detector amplifier and automatic voltage control tube in radio receivers It has an eight pin octal base Rotate the tube test data roll chart until the 6SQ7 appears in the TUBE TYPE column in the left hand window of the tube test data roll chart housing In addition to tests for short circuits interelement leakage and filament continuity note that this tube must be tested three times to test the transconductance of the triode section to measure the emission of diode No 1 and to measure the emission of diode No 2 In addition the gas content of the tube must be checked a Preparation Adjust the tube test data roll chart so the first line on which 6507 appears is in the center of the window between the horizontal red lines Refer to the column headings marked on the tube test data roll chart housing and proceed as follows 1 Perform the operations described in phragraph 5 2 Set the FUNCTION switch to TEST T 3 Set the SELECTORS switches to the positions indicated in the SELECTORS L TO R column on the tube test data roll chart and in the order indicated a FIL to 7 b FIL
70. procedures Operating precautions Tube test sockets and test adapters Preliminary starting procedure Operation under usual conditions Starting procedures meter Zero adjustment of PERCENT QUALITY Paragraph E El sl Page Ed Hg This manual supersedes so much of 11 2661 11 1955 including C4 8 November 1957 C5 21 April 1958 C6 15 May 1959 as pertains to operator s and organizational maintenance and so much of TM 11 6625 316 12P 23 July 1959 as pertains to the basic issue items list and the maintenance allocation chart Paragraph Page Section IV Interelement leakage test _____________ Filament continuity test 2 Transconductance test __ _______________________ 21 Gastesi le nid e 22 Emission test ________________________________ Voltage regulator and gas rectifier test ______ 24 Procedure for reading plate current less than 25 50 milliamperes of triode tubes Thyratron test _________ 26 30 Electron ray indicator test _ _ _____________ 27 3T Ballast tube test 222222 2 2 2 L 23 32 Indicator lamp test___________________ LLL s 22 Complete 33 Stopping procedure 2 2 2 2 2 __ L PERATOR S MAINTENANCE General ______________________________ 38 Preventive _________________ 38 22222 2 2 Operational checklist _____________ Removal and rep
71. rmine rejec tion limit for electron tubes used in receivers low powered trans mitters and other electronic equipment The following tests can be made with the tube tester a Short test b Interelement leakage test c Filament continuity test d Dynamic mutual conductance test for amplifier tubes e Gas test for amplifier tubes f Emission test for vacuum rectifier tubes g Test of gas rectifier tubes h Test of voltage regulator tubes i Plate current tests for triodes j Test of thyratron tubes k Electron ray indicator test for electronic indicator tubes l Ballast tube test 4 Technical Characteristics a Power supply Input voltage 02 103 5 to 126 5 volts ac Frequency 50 to 1 000 cps single phase Power consumption 70 watts no tube under test Temperature range Satisfactory operation from 4 F to 125 F b Meters FILAMENT VOLTS meter Type Dc voltmeter movement Frequency range 50 to 1 000 cps Ac voltage ranges O to 2 5 volts O to 10 volts O to 40 volts and O to 120 volts Redlines at 0 625 6 3 12 6 and 117 on appropriate scale Accuracy 5 percent error at full scale GRID BIAS VOLTS meter Type Dc voltmeter Sensitivity 1 000 ohms per volt Dc voltage ranges 0 to 5 volts O to 10 volts and 0 to 5
72. s The FUNCTION switch all SELECTORS switches except the PLATE switch and the PLATE SCREEN 35 RANGE switch are set as in a 2 through 4 above and the FILAMENT VOLTS meter indicates 6 3 volts 1 Set the PLATE switch to the 5 position 2 Set the PLATE SCREEN RANGE switch to the S posi tion 3 Adjust the PLATE fine control until the PLATE meter indicates 20 volts ac 4 Turn the quality SHUNT control to 90 5 Set the GM SIGNAL RANGE switch to the A position 6 For the TV 2 U aline the dot on the knob of the GM CENTERING control with the dot on the panel For the TV 2A U and TV 2B U aline the line marking on the GM CENTERING control with the line marking on the panel 7 Depress the PRESS TO TEST P2 switch and read the PERCENT QUALITY meter If the indication is less than the minimum limit of 25 discard the tube If the indication is satisfactory measure the emission of diode No 2 h Measurement of Emission Diode No 2 To measure the emission of diode No 2 adjust the tube test data roll chart so the third line on which the 6SQ7 tube appears is between the horizontal red lines The FUNCTION switch all SELECTORS switches except the PLATE switch are set as in g above and the FILAMENT VOLTS meter indicates 6 3 volts 1 Set the PLATE switch to the 4 position 2 With the PLATE SCREEN RANGE switch on S ad just the PLATE fine control until the PLATE meter indicates 20 volts ac 3 The quality SHU
73. t also specifies the tools and other equipment authorized at each echelon to perform the assigned maintenance functions b Columns in the maintenance allocation chart are as follows 1 Part or component This column shows only the no menclature or standard item name Additional descrip tive data are included only where clarification is nec essary to identify the part Components and parts com prising a major end item are listed alphabetically Assemblies and subassemblies are in alphabetical se quence with their components listed alphabetically im mediately below the assembly listing 2 Maintenance function This column indicates the various maintenance functions allocated to the echelon capable of performing the operations a Service To clean to preserve and to replenish fuel b c d e and lubricants Inspect To verify serviceability and to detect incipient electrical or mechanical failure by scrutiny Test To verify serviceability and to detect incipient electrical or mechanical failure by use of special equipment such as gages meters and other test de vices Replace To substitute service assemblies subassem blies and parts for unserviceable components Repair To restore an item to serviceable condition through correction of a specific failure or unserviceable condition This function includes but is not limited to inspecting cleaning preserving adjusting replace ing welding riveting an
74. ting par 422 c Visual inspection par 43 d Troubleshooting by using equipment performance checklist par 44 e Replacing test adapters par 45 41 Preventive Maintenance a Preventive maintenance is the systematic care inspection and servicing of equipment to maintain it in serviceable condition prevent breakdowns and assure maximum operational capability Preventive maintenance is the responsibility of all echelons concerned with the equipment and includes the inspection testing and repair or replace ment of parts that inspection and test indicate would probably fail before the next scheduled periodic service Preventive maintenance checks and services of the tube tester at the second echelon level are made at monthly intervals unless otherwise directed by the commanding officer b Maintenance forms and records to be used and maintained on this equipment are specified in TM 38 750 42 Monthly Maintenance Perform the maintenance functions indicated in the monthly preven tive maintenance checks and services chart par 42 1 once each month A month is defined as approximately 30 calendar days of 8 hour per day operation If the equipment is operated 16 hours a day the monthly preventive maintenance checks and services should be performed at 15 day intervals Adjustment of the maintenance interval must be made to compensate for any unusual operating conditions Equipment main tained in a standby ready for imme
75. tive Maintenance a DA Form 11 266 DA Form 11 266 figs 6 and 7 is a preventive maintenance checklist to be used by the operator Items not applicable to the tube tester are lined out im figure 7 References in the ITEM block i are to paragraphs that contain additional maintenance information pertinent to the par ticular item Instructions for the use of the form appear on the form b Items The information shown below supplements DA Form 11 266 The item numbers correspond to the ITEM numbers on the form Item Maintenance procedures 1 Use a clean cloth to remove dust dirt moisture and grease from the case and front panel If necessary wet the cloth with Cleaning Compound Federal stock No 7930 395 9542 and then wipe the parts with a dry clean cloth 3 All control knobs should work smoothly be tight on the shafts and should not bind Tighten all loose knobs and be sure that the knobs do not rub against the panel 5 Repair any cuts in the power cord insulation by covering them with rubber tape and then with friction tape Warning Cleaning compound is flammable and its fumes are toxic Do not use near a flame provide adequate ventilation 38 6 MAINTENANCE CHECK LIST FOR SIGNAL EQUIPMEN T TEST EQUIPMENT AR 730 623 EQUIPMENT NOMENCLATURE TEST SET ELECTRON TUBE Tv 2 v EQUIPMENT SERIAL NUMBER INSTRUCTIONS This orm may be used for period of one month by using the correct dates and weeks of the
76. ube test data roll chart Red calibration marks on the scales of both meters facilitate this adjustment e Operate the BIAS RANGE switch to the voltage or position specified on the tube test data roll chart f Adjust the BIAS fine control until the GRID BIAS VOLTS meter indicates the specified voltage g Set the quality SHUNT control to the number given on the tube test data roll chart and adjust the PERCENT QUALITY meter to zero par 17 h Operate the GM SIGNAL RANGE switch to the position specified for the quality test Adjust the SIGNAL V R fine control until the pointer of the SIGNAL VOLTS meter is on the red line j Depress the PRESS TO TEST P4 switch to its locking posi tion Depress and hold down the PRESS TO TEST switch Depressing the P6 switch may cause the PERCENT QUALITY meter pointer to move upward or downward on the scale If the pointer moves more than three scale divisions in either direction the tube contains too much gas for satisfactory operation Note Some tubes develop gas after they have been in operation for a period of time When this is suspected to be the case let the tube remain under test with operating potentials applied for several minutes before making the gas test When the test is completed set the ON OFF switch to the OFF position remove the tube under test from the test socket and return all switches and controls to their safety positions par 154 23 Emission T
77. unctions 2 Ist 2nd 3rd 4th 5th echelon The dagger symbol in dicates the echelons allocated the facility 3 Tool code This column lists the tool code assigned 2 Maintenance by Using Organizations When this equipment is used by Signal services organizations organic to the theater headquarters or communication zones vide theater communications those maintenance functions allocated up to and including fourth echelon are authorized to the organization operating this equipment 3 Mounting Hardware The basic entries of the maintenance allocation chart do not include mounting hardware such as screws nuts bolts washers brackets clamps etc 60 APPENDIX Ill BASIC ISSUE ITEMS LIST Section INTRODUCTION 1 Scope a General This appendix lists items supplied for initial opera tion and for running spares The list includes parts and material issued as part of the major end item and all items authorized for basic operator maintenance of the equipment End items of the equipment are issued on the basis of allowances prescribed in equipment authorization tables and other documents that are a basis for requisitioning b Columns The columns areas follows 1 Source maintenance and recoverability code Not used 2 Federal stock number This column lists the 11 digit Federal stock number 3 Designation by model Not used 4 Description Nomenclature or the standard item name and
78. ver both sections of the tube test data roll chart indicate the tube type the switches and controls of the tube tester in the order in which settings should be made and the minimum acceptable percentage of rated transconductance as indicated on the PERCENT QUALITY meter The information necessary to set the switches and controls for any tube type listed on the tube test data roll chart appear directly below these column headings Column Description TUBE TYPE Tubes that can be tested on the TV 2 U are listed in numerical and alphabetical order TEST Indicates type of test to be performed as follows EM Emission ER Electron ray indicator GM Transconductance LK Leakage TH Thyrathron VR Voltage regulator FUNCTION Indicates setting of FUNCTION switch as follows L Leakage T Test VR Voltage regulator SELECTORS L TO R Indicates setting of each selector switch reading from left to right on the tube tester as follows FIL FIL GRID PLATE SCREEN CATHODE SUPPRESSOR RANGE Indicates setting of range controls which correspond to following subcolumns FILAMENT BIAS PL SCR GM SIG 16 Column Description METER SETTING Indicates setting of meters by adjusting associated fine controls which corre spond to the following subcolumns PLATE BIAS SCREEN SIG VR set to redline RL or full scale FS
79. wer source and set the ON OFF switch to ON Set FILAMENT RANGE switch to sev eral voltages and adjust FILAMENT fine control for each of the voltages selected Set GM SIGNAL RANGE switch to each position and adjust SIGNAL V R fine control for each position Set the ON OFF switch to OFF _______ Set all switches to positions specified on tube test data roll chart for an avail able octal tube known to be in good condition insert tube in OCTAL tube socket and set the ON OFF switch to ON Set SHORT TEST switch to V position and depress PRESS TO TEST P1 switch Adjust FILAMENT fine control Normal indication PILOT lamp lights __________ Correc tive measure Replace fuses F1 and F2 par Replace PILOT lamp par in 9a Higher echelon repair required Pointer of FILAMENT VOLTS meter Higher echelon repair required indicates approximate voltage se lected then indicates exact voltage selected Pointer of SIGNAL meter can be ad justed to redline for each position of range switch PILOT lamp goes out ___________ PILOT lamp lights ___________ _ FIL CONT SHORT lamp lights ____ FILAMENT VOLTS meter indicates exact voltage selected Higher echelon repair required Higher echelon repair required Higher echelon repair required 895 oar pu CONT SHORT lamp ter X3B par 5 Higher echelon For TV 2B U 3 replace test adap repair require EQUIPMENT PERFORMANCE

U.S. Department of Defense TV-2/U User's Manual

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