MIL-PRF-1/1335H
TABLE I. Testing and inspection - Continued.
Inspection
Method
Notes
Conditions
Acceptance
Symbol
Limits
Unit
MIL-STD-1311
Level
12/
Min
Max
Conformance inspection,
part 2 - Continued.
3/
1266
Grid emission
Ef = 7.0 V;
---
Ic
0
-2.0
µA dc
Ecc = -10 V dc;
Rg = 0.1 MegΩ
1.05
1.45
pF
Cgp
Direct-interelectrode
1.25
1331
---
2.25
pF
Cin
---
0.013
0.045
capacitance
pF
Cout
1.1
1.9
pF
Chk
6/
---
---
---
---
---
Envelope strain
---
---
Ep
---
10
mV ac
8/
Ebb = 150 V dc;
Low-frequency vibration
1031
Rp = 10,000 ohms;
Rk = 82 ohms;
Ec = 0; 15 G;
F = 40 Hz
Conformance inspection,
part 3
---
---
---
---
---
Ef = 7.0 V;
5/
Heater-cycling life
1506
Ehk = +70 V dc;
Rk = 0;
Ec = Eb = 0
Heater-cycling life-test
---
end points:
1336
Heater-cathode leakage
---
---
Ihk
---
40
µA dc
Stability life
1516
---
Eb = 150 V dc;
2.5
---
---
---
---
Ecc = +6 V dc;
Ehk = -70 V dc;
Rk = 910 ohms;
Rg = 0.1 MegΩ
---
Stability life-test end-point:
(2 and 20 hours)
%
15
---
---
---
1306
Change in transconduc-
ĆSm
tance (1) of individual
t
tubes
See footnotes at end of table.
3
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