MIL-E-1/190K
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
1501
Stability life-test
---
---
---
---
(high temperature)
conditions;
TE = +220°C (min)
(see notes 2 and 7)
Intermittent life-test end points
---
(500 hours)
(high temperature):
µA dc
Total grid current
1266
Ic
0
-0.9
Heater current
1301
If
276
328
mA
ĆSm
Change in transconductance (1)
1306
---
20
%
of individual tubes
t
ĆSm
Transconductance (2)
1306
---
15
%
Ef
µA dc
Heater-cathode leakage
1336
Ihk
---
10
MegΩ
Insulation of electrodes
1211
R
50
---
Transconductance (1) average
1306
Avg
---
15
%
ĆSm
change
t
Intermittent life-test end points
---
(1,000 hours)
(high temperature):
µA dc
Total grid current
1266
Ic
0
-0.9
Heater current
1301
Il
276
328
mA
ĆSm
Change in transconductance (1)
1306
---
25
%
of individual tubes
t
ĆSm
Transconductance (2)
1306
---
20
%
Ef
µA dc
Heater-cathode leakage
1336
Ihk
---
10
MegΩ
Insulation of electrodes
1211
R
25
---
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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