MIL-PRF-1/1330G
TABLE I. Testing and inspection - Continued.
Inspection
Method
Notes
Conditions
Acceptance
Symbol
Limits
Unit
MIL-STD-1311
Level
13/
Min
Max
Conformance inspection,
part 2 - Continued.
3/
1266
Grid emission
Ef = 7 V;
---
Ic
0
-2.0
µA dc
Ecc = -20 V dc;
Rg = 0.1 MegΩ
ĆIb
Grid recovery
2210
7/
mA dc
0.6
---
Ebb = 250 V dc;
---
ĆIb
1.0
---
Ec/Ib = 3.0 mA dc;
ma
Rp = 0.01 MegΩ
pF
1.36
1.06
Cgp
pF
2.10
1.20
1331
---
Direct-interelectrode
Cin
---
pF
0.015
0.005
capacitance
Cout
pF
1.40
0.80
Chk
5/
---
---
---
---
---
Envelop strain
---
9/
Ebb = 150 V dc;
---
Ep
---
10
mV ac
Low-frequency vibration
1031
Rp = 10,000 ohms;
15 G; F = 40 Hz
Conformance inspection,
part 3
Heater-cycling life
8/
1506
Ef = 7 V;
---
---
---
---
---
Ehk = +70 V;
Rk = 0;
Ec = Eb = 0
---
Heater-cycling life-test
end points:
40
---
Ihk
---
---
1336
Heater-cathode leakage
µA dc
2.5
---
---
---
---
6/
Ebb = 150 V dc;
Stability life
1516
Rk = 0; Eg = 7.7 V ac;
Ehk = -70 V dc;
Rg = 3,300 ohms;
Rb = 4,700 ohms;
TA = 20°C
Stability life-test end-point:
---
(2 and 20 hours)
---
Change in transconduc-
---
---
---
15
%
ĆSm
tance (1) of individual
t
tubes
See footnotes at end of table.
3
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