MIL-PRF-1/1655E
TABLE I. Test conditions - Continued.
Limits
MIL-
Acceptance
Unit
STD-
Requirement or test
Notes
Conditions
level
Symbol
1311
(see note 13)
Min
Max
Method
Conformance
inspection, part 3
-Continued
1516
Stability life
6
Eb = 150 V dc;
---
---
---
---
---
Ehk = 300 V ac;
Rk/k = 400 ohms;
TA = room
---
Stability life-test
end point (1 hour):
ĆSm
1306
Transconductance
---
---
10
%
(1) change of
t
individual tubes
1501
Intermittent life
5,12
Stability life-test
---
---
---
---
---
conditions;
TE = +250°C
(min)
---
Intermittent life-test
end points
(1,000 hours):
---
Inoperatives
---
---
---
---
---
1266
Total grid current
---
Ic
0
-5
ľA dc
ĆSm
1306
Transconductance
---
---
10
%
(2)
Ef
1336
Heater-cathode
---
Ihk
---
50
ľA dc
leakage
1301
Heater current
---
If
2.25
2.75
A
ĆSm
1306
Transconductance
---
---
15
%
(1) change of
t
individual tubes
MegΩ
1211
Insulation of
---
R
100
---
electrodes
See footnotes at top of next page.
6
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