12AT7WA | DigiCamel IC Datasheet

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12AT7WA RAYTHEON | Alldatasheet

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TECHNICAL f +t: 7 : INFORMATION Information : SERVICE : RELIABLE MINIATURE : DOUBLE TRIODE : MECHANICAL DATA low plate resistance plus the ample peck plate current make this type ideal for pulse amplifier BASING 01... eeeee eee DA signed for dependable operation under conditions of shock and vibration encountered in mobile, : aircraft and missile applications. A heater center tap is provided to permit operation at 12.6 volts : or paralie! operation at 6.3 volts. PHYSICAL DIMENSIONS MECHANICAL RATINGS: : 16 be i 1 AWtUde sce ec ccc ccc ecececeeceteecesseteeeeetetnerectecteseeeseseners es 60,000 ft. i 2 & : ES 3 ELECTRICAL DATA : 7 “ Ratings and MIL-E-1 Test Normal Normal Test MIL-E-1 : I | Normal Operation Symbol Limit Test Operation Limit Units ! TTT rs or Conditions = ~~~ or —_— I Design Design : Minimum: Moximum 3 ~~ Ratings ~~ : Hester Voltage Ef Series "4 12.6 M26 139 v : porallel 5. 63 3 6 : BASING Plate Voltage Eb: o 250 250 330 Vde : Grid Voltage Ecl: 55 0 0 0 Vde : 6) Plate Dissipation Pp/p: a oo 25 25 wW : @ YS) (per Plate) : iY Heater—Cathode Ehk: oo oo os £100 v : @ (7) Voltage : (lq = | , : I Fixed Ro/at see oe oe 0.25 Mog. : ex} mo Grid Resist 919% : ance Cathode Rg/g: oe os oo 0.5 Meg. : @) 9) Bias : Tests i BOTTOM VIEW Plate Current (1) Ib/p: 7 os 10 4 mAde : (per plate) : Cathode Resistance Rk/k: oe 200 200 oe ohms : (per cathode) TERMINAL CONNECTIONS: Transconductance — Sm/p: 4500 “ 5500 6500 pmhos : Pin! Plate, Unit #2 per plate : Pin 2 Grid, Unit #2 Amplification Factor Mu/p: 50 os 60 70 oo : Pin3 Cathode, Unit #2 Heater Current it: 142 os 150 158 mA : Pin 4 Heeter Plate Current (2) 1b/bs oe os Ps ry) pAde Andel Cut-off (Ecl = : Pin 6 Plate, Unit #1

20 Vde) : Pin 7 Grid, Unit #1

Flate Current (1) Att: aa aa aa 32 mAde : Pin 8 Cathode, Unit #1 sections i Pin 9 Heoter Center-Top RAYTHEON COMPANY - 55 Chapel Street Newton 58, Massachusetts : 9/1/60 Page 1

i RELIABLE MINIATURE DOUBLE TRIODE Ratings and MIL-E-1 Test Normal Normal Test MIL-E-1 Normal Operation Symbol Limit Test Operation Limit Units or Conditions or Design Design Minimum Maximum Tests Vibration (parallel) Ep: oa — see 100 mVac £=40 cps; G=10 Capacitance (no shield) Cap: 1.3 os 1.6 wW yt Capacitance {no shield) Cin: 2.0 os 2.5 3.0 yt Capacitance (no shield) Cout: 0.20 oe 0.45 0.70 ig Section 1 Capacitance (no shield) Cout: 0.16 oe 0.38 0.60 yt Section 2 Capacitance (no shield) Cpp: 0.15 on 0.24 0.33 put Capacitance (no shield) Chk: 24 on 2.8 3.50 rg SPECIAL TESTS AND RATINGS TO INSURE RELIABILITY. Randomly selected statistical samples are subjected to the following tests: Shock Test — 630G. 42° hammer angle in Navy high impact shock machine. Sample subjected to twenty impact accelerations, five impact accelerations in each of four different positions. Fatigue Test — 2.5G. Sample subjected to vibrational acceleration of 2.5G for 96 hours (32 hours in each of three positions). The sinusoidal vibration is applied at a fixed frequency between 25 and 60 cycles per second. Glass Strain — A sample is subjected to a forty eight hour holding period at room temperature. The sample is immersed in water at 97~100°C for 15 seconds and immediately immersed in water at not more than 5°C. The sample is then dried at room temperature for 48 hours and inspected for evidence of air leaks. Heater—Cycling A sample is subjected to 2000 on-off heater cycles at the following conditions. Ef=7.5V Life Test— (heaters in parallel); Ehk = +135 Vde and other elements floating. At the conclusion of this test the tubes will not show open heater or cathode circuits and meet a maximum lhk leakage limit of 15 pAdc. Stability Life Test— Sample is operated for two and twenty hours to evaluate initial electrical stability (A, Sm< 10%). Survival Rate Sample is operated one hundred hours to evaluate inoperatives and early electrical stability. Life Test— Intermittent 1000 hours. Sample is operated with minimum Envelope Temperature of 165°C. Life Test - Interface 500 hours. Sample is operated with Ef=6.9V (heaters in parallel) other electrodes dis— Life Test— connected. (Interface resistance < 50 ohms). Page 2 9/1/60 : RAYTHEON COMPANY - 55 Chapel Street - Newton 58, Massachusetts

RELIABLE MINIATURE DOUBLE TRIODE : Altitude— Sample is subjected to a pressure of 55+5 mmHg to evaluate flashover or corona at the pins of the tube. APPLICATION NOTES CAUTION - -=To Electron Equipment Design Engineers. Special attention should be given to the temperature which the tubes are to be operated. Reliability will be seriously impaired if maximum bulb temperature is exceeded. The life expectancy may be reduced if conditions other than those specified for life test are imposed on the tube and will be reduced appreciably if maximum ratings are exceeded. Both reliability and performance will be jeopardized if filament voltage ratings are exceeded. Life and reliability of performance are closely related to the degree that regulation of the heater voltage is maintained at its center rated value. ACCEPTANCE CRITERIA The following tests shall be performed: For the purpose of inspection, use applicable reliable paragraphs of Specification MIL-E-1. For miscellaneous requirements, see 3.6. Test AQL | Inspection LIMITS (See Note 1) Conditions (Percent | Level or | Symbol (See Note 2) Defective) | Cede [winT Cat] wont Vel] Nox] ala | GENERAL

3.1 Quolificotion Required for JAN

3.6 Performance

QUALIFICATION TESTS (see note 3) see Cathode Coated unipotential se

3.4.3 Base Connections Outline E9-1 wee

4.10.9 Transconductance(1) Ck= 1,000 pt see Sm +++ |5000 |5500 |6000 | --- 1000 } pmhos

(see note 6) 4.10.9 Transconductance(1) Ck= 1000 pt 0.4 Sm 4500] «+» | ++ | +++ [6500] --+ | pmhos (see note 6) 4.7.5 Continuity ond Shorts 0.4 _ see bees [eee | eee | eee [eee Jee

49.1 Mechanical~ Outline 6-7 we wee cee feee | cee fee [eee ]eee eee

RAYTHEON COMPANY - 55 Chapel Street ‘Newton 58, Massachusetts : 9/1/60 Page 3 of 10

48 Insulation of elec— | (see note 6)

trodes E (g—all)=—100 Vde 25 Lé R $00] --- | --- |---|] --+ [---1 Meg E (p~all)=~300 Vde R 500} --- | o-e2 | ee] -22 | 222] Meg (difference between sections) Rp=0.1 Meg Rk/k=0(see note 6) 4.10.9 Transconductance (2)} Ef=11.4V 25 | A gsm see [eee wee [eee] 1S foe) ® Ck= 1000 pt (see note 6) 4,10.6.2 Grid Emission Ef=15.0V 2.5 i le O}--- see | eee [ALS |---| pAde = 0.5 Me Re=0; Ck=0" (see notes 6 and 7) 4.10.3.1 | Rediomfrequency | Ecal=15 mVac 25 toe wee [eee | eee [eee | ee [epee noise (other thon | Rk= 100; Ch=0.2 us shot—effect noise) (see notes 4 and 8) phonics (for re— Ebb=300 Vdc; iable receiving Ecal=100 mVac; tubes) Rk= 200; Rp=10,000; grid grounded; Gx F000 (see notes 4 and 9) oo Pulse cathode Ef=12.6V 25 Code ik 280 | --- see free | cee [eee] mo current Eb=250 Vdc; H Ec=~30 Vde; Rk=1.0 (see notes 6 and 10) 4.10.11.1] Amplification factor | (see note 6) 6.5 Lé | Mu 50 |---| --- |---| 70 |---|--- trode capacitance __| No shield ICin 2.00 |---| --- | --- |3.00 |---| puf No shield; section | 6.5 Code |JCout 0.20 |--- | --- | --- 10.70 |---| uf No shield; section 2 . E \\Cout 0.16 | --- see | ee [0.60 |---| put No shield ICpp 0.15 |---| --- | -+- 10.33 |---| put No shield [Chk 2.10 | ++ see | ee= 13.50 |---| pt 4.9.12.1 | Low=pressure Pressure=55+5mmHg; 6.5 (See voltage breakdown | voltage=500 Vac Notel1| --- wee jee | cee [eee] eee [epee 4.9.19.1 Low-frequency Ec=—3 Vde; Rp= 2,000; 6.5 Code Ep aoe [aoe wee | --- 1 100 |---|] mVoc vibration (2) Rk=0; Ck=0; G=10; | F=40 cps (see note 4) DEGRADATION RATE ACCEPTANCE TESTS, (see note 12) 4.9.20.5 | Shock test Hommer ongle=42°; see _ wee cee [owe we os Ehk=+100 Vde (see note 13) 4.9.20.6 | Fatigue test G=2.5; fixed frequency; 65 (See | --- wee owe ee ee F=25 min. 60 max, Note 11 see Post shock and Vibration (2) see aoe Ep see [owe 150 mVac fatigue test end Heater-cothode leakage points Ehk=+ 100 Vde one ase thk see [ooe 20 pAde Ehk=—100 Vde see see thk see |eoe 20 pAde Transconductance(1) aes Sm 3800 | +++ see pmhos Grid Current oo oo Ie O fe 15 de Page 4 of 10 9/1/60 : RAYTHEON COMPANY : 55 Chapel Street - Newton 58, Massachusetts

RELIABLE MINIATURE DOUBLE TRIODE : Test AGL Inspection LIMITS (See Note 1) (Percent ) Level or | Symbol (See Note 2) Defective) | Code [a [oa] ee wtf ea

4.9.6.1 Miniature—tube base— oo oe ae oo see

4.9.6.3 Glass strain (for 25 i a oe ae

receiving tubes) 47 Heater—cycling life test | Ef=7.5V; a oe on oo oo heaters in parallel Ehk=+135 Vde (see note 14)

44 Life—test end points | Heater cathode

Ehk=+ 100 Vde oe oe thk oe Ade Ehk=—100 Vde oe hk oe pAde oe Stability life test Ehk=+135 Vde 1.0 Code | --- oo oo Rg/g=0.5 meg. ' TA=room (see note 15) 4d Life-test end points | Change in transcon— oo oe A,Sm a % (stability) ductance (1) of in— (2 and 20 hours) dividual tubes 4.11.3.1(b) | Survival —rate life Stability life test oon oe see oe test conditions or equivalent (see notes 16 and 17) 4d Life-test end points | Continuity and shorts | 0.65 oe o oe oo (survival rate) Transconductance(1) 1.0 see Sm 3800 pmhos (100 hours)

45 Intermittent life— Stability life test oe o oo oo os

test operation conditions; T(envelope)= 165°C min (see notes 18 and 19) Allowable Defects per characteristic AQL | Inspection Test Conditions (Percent | Level or Combined] Defective)| Code Sample ACCEPTANCE LIFE TESTS (cont'd.)

4.1.4 Life-test end points —_| (See note 20)

(intermittent) Inoperatives wee os 3 ee oe on Por (500 hours) (See note 21) Total grid current oe oo 3 Ie 0 |-0.7] pA Heater Current oe oe 3 if 142 | 162} mA Change in transcon~ oe a 3 Asm | +e 20] % ductance (1) of in— dividual tubes Transconductance (2) see oo 3 AgySm | == 15] % Heater—cathode leakage Ehk=+ 100 Vde a we 3 thk os 7] pAde Ehk=—100 Vde thk oe 7] pAde Insulation of electrodes E(g—all}=—-100V we . 3 R 250 | --- | Meg. E(p=all)=~300 V . ° R 250 |---| Meg. Transconductance (1) ae wee cee | AvgASm | oe | % average change Total defectives oe os 6 see wee | eee | ee RAYTHEON COMPANY : 55 Chapel Street: Newton 58, Massachusetts ; 9/1/60 Page Sof 0

: RELIABLE MINIATURE DOUBLE TRIODE Allowable Defects LIMITS AQL Inspection | Per Characteristic Test (Percent | Level or Defective) | Code ACCEPTANCE LIFE TESTS (cont'd.)}

4.11.4 Life—test end points (See note 20)

(intermittent) Inoperatives 1 3 oo wee | eee foes (1000 hours) (see note 21) Total grid current 1 3 Ic 0 |-0.7 | pAde Heater current 1 3 Mf 142 | 164 | mA Change in transcon— 1 3 Asm - | 251% ductance (1) of in— dividual tubes Tran sconductance (2) 1 3 Aggsm ote 20 |% Heater—cathode leokage Ehk=+ 100 Vde 1 3 thk wee 7 | pAde Ehk=—100 Vde th oes 7 | pAde Insulation of electrodes E(g—all}=—100 Vde 1 3 R 100 | --- | Meg E(p—all)=~300 Vde R 100 | --- | Meg Total defectives 4 8 Tee see | cee Powe 4.11.8 Cathode interface life | Ef=6.9V; heaters in se pose ft 500 | --- | hr test parallel; other elec— trodes disconnected (see note 22) 4d Life-test end points | Ef=5.740.05 Vde, 1 3 Ri s-+ | 50 | ohm heaters in parallel, Eb=135 Vde; Ec/Ib=2.0 mAde (see notes 23 and 24)

4.9.18 Container drop (d) Package group 1,

(see note 25) container size B Note 1: The sequence of tests listed hereon is the suggested order in which the tests should be conducted. Note 2: Variables sampling procedure (see 4.1.1.7). Note 3: All tests listed hereon shall be performed during qualification; however, these three tests are normally performed qualification inspection only. Note 4: Tie Tk to 2k; 1g to 2g; and Ip to 2p. Note 5: The AQL for the combined defectives for attributes in measurements acceptance tests, part 1, excluding inoperatives and mechanical shel! be 1 percent. Note 6: Test each unit separately. Note 7: Prior to this test, tubes shall be preheated a minimum of 5 minutes with all sections operating at the conditions indicated below. The 3— minute test is not permitted. Test at specified conditions within 3 seconds after preheating. Grid emission shall be the last test per— formed on the sample selected for the grid emission test. Ef Ecl Eb Rk/k Ro/g Vv Vde Vde ohms Meg 15.0 0 250 200 0.5 Note 8: — In addition to the rejection criteria of 4.10.3.1, the output shall be read on a VU meter using a rejection limit of 5 VU. Five VU is the meter deflection obtained with a steady state output of 3 mW from the omplifier. Page 6 of 10 9/1/60 : RAYTHEON COMPANY - 55 Chapel Street - Newton 58, Massachusetts

RELIABLE MINIATURE DOUBLE TRIODE : NOTES (con't) Note 9: The rejection level shall be set at the VU meter reading obtained during calibration. Note 10: The grid is driven with a pulse voltage as follows: egk=+30 v; prr= 1000; tp=10 pis; tr<1 pis; tf<I pts (egk shall be defined os the instantaneous peak voltage between the grid and the negative end of the cathode resistor). Peak cathode current shall be measured by means of a high impedance oscilloscope, or equivalent, device connected across a cathode resistor of 1.0 ohm. Pre— heat at Ef=12.6 V for 5 minutes; no other voltages applied. Note 11: This test shall be conducted on the initial lot and thereafter on a lot approximately every 30 days. When one lot has passed, the 30-day rule shall apply. In the event of lot failure, the lot shall be rejected and the succeeding lots shall be subjected to this test until one lot passes. Standard MIL-STD~105, sample size code letter F, shall apply. Note 12: Destructive tests. Tubes subjected to the following destructive tests shall not be delivered on the contract or order:

4.9.20.5 Shock test

4.9.20.6 Fotigue test

4.11.7 Heater—cycling life test

4.11.5 Intermittent life—test operation

4.11.8 Cathode interface life test

Note 13: A grid resistor of 0.1 Meg shall be added to each section; however, this resistor shall not be used when a thyratron=type short indicator is employed. Note 14: The no-load to steady state full load regulation of the heater voltage supply shall be not more than 3.0 percent. This test shall be made on a iot—by—lot basis. A failure or defect shall consist of an open heater, open cothode circuit, heater—cathode short, or heater~cathode leakage current in excess of the specified heater—cycling life—test end-point limit. Note 19: Envelope temperature is defined as the highest temperature indicated when using a thermocouple of No, 40B&S or sinaller diameter elements welded to a ring of 0.025~inch diameter phosphor bronze in contact with the envelope. The envelope temperature require~ ment will be satisfied if a tube having bogie plate current (+5 percent) under normal test conditions, is determined to operate at or above the minimum specified temperature in any position of the life-test rack. Note 21: An inoperative as referenced in life test is defined as a tube having one or more of the following defects: Discontinuity (see 4.7.1 Note 22: The cathode interface life-test sample shall consist of 20 tubes, and not more than one tube failure shall be permitted. In the event of rejection of the first sample due to faliure of more than one tube, a second sample of 40 tubes shall be selected from the lot. Acceptonce shall then be based on the combined first and second samples. The total tube failures from the combined first and second samples shall not exceed three, A Iife~test defect is defined as a failure to meet the life-test end—point limits as specified ‘on the tube specification sheet. The cathode Interface life-test sample shall be read at zero hours and 500 hours (plus 48 hours, minus 24 hours), RAYTHEON COMPANY : 55 Chapel Street ‘Newton 58, Massachusetts : 9/1/60 Page 7 of 10

12AT7WA : : RELIABLE MINIATURE DOUBLE TRIODE NOTES: (cont’é.) Note 23: Preheat approximately 5 minutes prior to testing, using either Ef=11.4V (heaters in series) or Ef=5.7V (heaters in porallel), other electrodes disconnected. No other test shall be made from the start of the cathode interface life test until after the measurement of the end point characteristic, following completion of the indicated minimum number of life-test hours. Note 24: The value of interface resistance shall be measured in the standard test circuit. Drawing 248~JAN. As on alternative, a test method known to correlate with the method and conditions specified in this specification sheet may be utilized. Note 25: Not required for qualification. AVERAGE PLATE CHARACTERISTICS

70 Each Section)

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8 WA At et eo | | TT

pe) 8b een ee A 2" UA eterna i i WO Sees Vortec Tareas | | tt ee ed le 0 100 200 300 400 500 Plote Voltage ~ Volts Page 8 of 10 9/60 : RAYTHEON COMPANY : 55 Chapel Street - Newton 58, Massachusetts

RELIABLE MINIATURE DOUBLE TRIODE : vorrei Rg aR awe een PT TT ee Tyee TT TET Tt |_| Ef= Rated Value Ht tt A 30 FE Ereeeeereere] Lf Tt pft dpb of |... Rita | ble PTT fy LT eee tee ee yA], pak fb beet AA 3 HEH +- CHK” | BRR CT 4 3 H+ ++ +44 J. 2 PPh AAS ft a A SERRE E2828 204 jp ee ee -10 -8 6 ~4 =2 0 Grid Voltage ~ Volts AVERAGE PLATE CHARACTERISTICS (Each Section) “TTTTTTT TT ay aaeee se feted FET fi | AL) |_| ae J fog] ws LL TT HA AY tH PLT TTT TT Pry YT eT 2oLLT TTT TTY TY | Yt eT ; AF Fig 4 he LEAH AH A | | | Stitt TATA TY Ay | ew LE A KH Alt | Hf 4 VY LV el eA AO LA | » Aer 0 100 200 300 400 500 Plate Voltage ~ Volts RAYTHEON COMPANY - 55 Chapel Street - Newton 58, Massachusetts : 9/1/60 Page 9 of 10

: RELIABLE MINIATURE DOUBLE TRIODE AVERAGE CHARACTERISTICS (Each Section) 10000 too 500 TTT TT TT TTT [|| tT FREESE EEE rena EEE PyYY Pye yee PT TTY rEV ETT Py y fool PTT TET TTT TT TY ooo 80 © 40000 i. A A} eg . PAA TP Tt et es HH 3 af A er er tt er : cot somo NA er tone PT sno 3 zoe PTI et eee | eS BEND “.annP? 288) pert it titi t ttt 6s $2 BED <h¥= 27 4nn aT ii Ti titi titty) 3

2 OF weom LASS A see EET aoe §

Fe fA | TPN te Lt A | oe [TPT Pry ery woe ES | YATE) AH TTT reer | LTA Pe oo EAL HE : ~>A LLL Trt TT Pir 0 2 4 6 8 10 12 4 Plate Current — Milliamperes Page 10 of 10 9/1/60 : RAYTHEON COMPANY ° 55 Chapel Street : Newton 58, Massachusetts

Product Information

12AT7WA specifications and overview.

Summary

RELIABLE MINIATURE DOUBLE TRIODE

Description

RELIABLE MINIATURE DOUBLE TRIODE

Source title 12AT7WA Datasheet(PDF) - Raytheon Company

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