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|  MIL-E-1/190J
TABLE I. Testing and inspection - Continued.
MIL-STD-1311
Requirement or test
Conditions
Symbol
Limits
Units
Test method
Min
Max
Conformance inspection,
part 3 - Continued
---
Intermittent life-
test end point (room
temperature (1,000
hours):
1211
Insulation of
R
25
---
Meg
electrodes
1501
Intermittent life
Stability life-test
---
---
---
---
(high temperature)
conditions; TE =
+220C (min) (see
notes 2 and 7)
---
Intermittent life-test
end points (500 hours)
(high temperature):
A dc
1266
Total grid current
Ic
0
-0.9
1301
Heater current
If
276
328
mA
ĆSm
1306
Change in transcon-
---
20
%
ductance (1) of
t
individual tubes
ĆSm
1306
Transconductance (2)
---
15
%
Ef
A dc
1336
Heater-cathode
Ihk
---
10
leakage
1211
Insulation of electrodes
R
50
---
Meg
1306
Transconductance (1)
Avg
---
15
%
ĆSm
average change
t
---
Intermittent life-test
end points (1,000
hours) (high temperature):
A dc
1266
Total grid current
Ic
0
-0.9
1301
Heater current
Il
276
328
mA
ĆSm
1306
Change in transcon-
---
25
%
ductance (1) of
t
individual tubes
ĆSm
1306
Transconductance (2)
---
20
%
Ef
A dc
1336
Heater-cathode
Ihk
---
10
leakage
1211
Insulation of electrodes
R
25
---
Meg
NOTES:
1. See "Reduced pressure (altitude) rating", and altitude, maximum peak voltage in the basic document.
2.
Test each unit separately.
3.
This test to be performed at the conclusion of the holding period.
4.
Tie 1k to 2k; 1g to 2g; and 1a to 2a.
4
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