MIL-E-1/175K
TABLE I. Testing and inspection - Continued.
Limits
MIL-STD-1311
Requirement or test
Units
Conditions
Symbol
Method
Min
Max
Conformance inspection, part 3
- Continued
Intermittent life-test end point:
---
(room temperature):
(1,000 hours)
MegΩ
Insulation of electrodes
1211
R
25
---
Intermittent life test
1501
Stability life-test conditions;
---
---
---
---
TE = +220°C (min)
(see note 4)
Intermittent life-test end points
---
(500 hours):
Heater current
1301
If
414
492
mA
µA dc
Heater-cathode
1336
Ihk
---
60
leakage
µA dc
Total grid current (1)
1266
Icl
0
-2.0
ĆPo
Change in power output (1)
1341
---
20
%
of individual tubes
t
Avg. ĆPo
Power output (1)
1341
---
15
%
average change
t
MegΩ
Insulation of electrodes
1211
R
50
---
ĆPo
Power output (2)
1341
---
15
%
Ef
Intermittent life-test end points:
---
(1,000 hours)
Inoperatives
---
---
---
---
---
Heater current
1301
If
414
492
mA
µA dc
Heater-cathode leakage
1336
Ihk
---
60
µA dc
Total grid current (1)
1266
Icl
0
-2.0
ĆPo
Change in power output (1)
1341
---
25
%
of individual tubes
t
MegΩ
Insulation of electrodes
1211
R
25
---
ĆPo
Power output (2)
1341
---
20
%
Ef
4
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