MIL-PRF-1/952H
TABLE I. Testing and Inspection
Limits
Requirement or Test
Method
Conditions
Acceptance
Symbol
Unit
MIL-STD-1311
level note 9
Min
Max
Conformance inspection,
part 1
Heater current
1301
0.4
If
275
325
mA
Heater-cathode leakage
1334
0.4
Ihk
---
10
uA dc
Total grid current
1266
Ec1 = 1.0 V dc;
0.4
Ic1
0
-1.0
uA dc
Rg1 = 0.25 MegΩ
(see note 3)
Electrode current (1)
1256
See note 3
0.4
Ib
8.0
13.5
mA dc
(anode)
Electrode current (2)
1256
Ec1 = -9 V dc;
0.4
Ib
---
35
uA dc
Ep = 0.1 MegΩ
(anode)
Electrode current
1256
0.4
Ic2
2.6
6.0
mA dc
(screen-grid)
Transconductance (1)
1304
0.4
Sm
4,150
6,250
umhos
Short and discontinuity
1201
0.4
---
---
---
---
detection
Conformance inspection,
part 2
MegΩ
Insulation of electrodes
1211
2.5
R
---
---
Electrode current (3)
1256
Ec1 = -6 V dc
2.5
Ib
5
---
uA dc
Rp = 0.5 MegΩ
(anode)
Transconductance (2)
1306
Ef = 5.7 V
2.5
*Sm
---
15
%
Ef
Grid emission
1266
Et = 7.5 V;
2.5
Ic1
0
-2.0
uA dc
Ec1 = -10 V dc;
Rg1 = 0.25 MegΩ
(See note 4)
Noise and microphonics
2201
Ef = 6.3 V dc;
2.5
---
---
---
---
Ebb = 300 V dc;
Ecc2 = 300 V dc;
Ecal = 500 mV ac;
Rk = 1,000 ohms;
Rp = 0.22 MegΩ;
Rg2 = 0.5 MegΩ;
Cg2 = 2 µF
Direct-interelectrode
1331
No shield
6.5
Cgip
---
0.0035
pF
capacitance
Cin
4.8
7.2
pF
Cout
3.9
5.9
pF
High-frequency vibration
1031
Rp = 2,000 ohms
6.5
Ep
---
300
mV ac
Shock
1041
450 G; Ehk = +100 V dc
---
---
---
---
---
(see note 5)
Vibration-fatigue
1031
6.5
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2
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