MIL-E-1/63C
TABLE I. Testing and inspection.
Limits
MIL-STD-1311
Unit
Requirement or test
Conditions
Symbol
Method
Min
Max
Conformance
inspection, part 1
Total grid current
1266
1/ 2/
Ic
0
-2.0
µAdc
Transconductance (1)
1306
3/
Sm
2,075
3,125
µmhos
Transconductance (3)
1306
Eb=28 Vdc;Ec=0;
Sm
1,400
2,200
µmhos
Rg=0.05 MegΩ
Type 12SX7GT
3/ 5/
Audio frequency noise
1246
Esig=70 mVac;
EB
---
17
vu
Rp=10,000 ohms
1/
Emission
1231
Eb=Ec=30 Vdc
Is
40
---
mAdc
2/ 3/
Short and discontinuity
1201
---
---
---
---
detection
Electrode current (1)
1256
3/
Ib
5.5
12.5
mAdc
(anode)
Conformance
inspection, part 2
Low-frequency
1031
Rp= 2,000 ohms
Ep
---
150
mVac
vibration
1/
Heater current
1301
If
275
325
mA
Heater-cathode
1336
1/
Ihk
0
30
µAdc
leakage
Transconductance (2)
1306
Eb=90 Vdc; Ec= 0
Sm
2,400
3,600
µmhos
3/
Electrode current (2)
1256
Ec= -24 Vdc
Ib
0
20
µAdc
(anode)
3/
Amplification factor
1316
3/
Mu
18
23
---
Secureness of base,
1101
---
---
---
---
cap, or insert
Permanence of
1105
---
---
---
---
marking
MegΩ
Insulation of electrodes
1211
R
10
---
Conformance
inspection, part 3
Life-test provisions
---
Group A: Ehk=100 V
---
---
---
---
1/
Life-test end point
---
Transconductance (1)
Sm
1,550
---
µmhos
(500 hours)
See notes at end of table.
2
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