MIL-PRF-1/290E
TABLE I. Testing and Inspection. -Continued.
MIL-STD-
Limits
Acceptance
1311
Requirement or test
Conditions
level (see
Unit
Symbol
Min
Max
method
note 10)
Conformance inspection,
part 2 (see note 1)
-Continued
Post-shock and vibration-
---
Low-frequency vibration
Ep
---
---
100
mV ac
fatigue test end points
Ionization voltage (1)
---
Ez
---
165
V dc
Voltage drop (1)
---
Etd
142
155
V dc
Voltage drop (2)
---
Etd
142
155
V dc
Regulation
---
Reg
---
±5
V dc
1121
Base strain
---
---
---
---
---
2126
Glass strain
2.5
---
---
---
---
1105
Permanence of marking
---
---
---
---
---
MIL-STD-
Limits
1311
Unit
Requirement or test
Conditions
Symbol
Min
Max
method
Conformance inspection,
part 3
Stability life test
1516
Ebb/Ib = 20 mA dc;
---
---
---
---
TA = room
ΔEtd
Stability life-test
---
Change in voltage drop (3)
---
2.0
V dc
end point
of individual tubes (see note 9)
t
Survival-rate life-test
1521
Stability life-test, or equivalent
---
---
---
---
conditions
Survival-rate life-test
---
Short and discontinuity detection.
---
---
---
---
end points
ΔEtd
Change in voltage drop (3)
---
5.0
V dc
of individual tubes.
t
Life test
---
Stability life-test or equivalent
---
---
---
---
conditions, TE = 150°C (min)
(see note 8)
Life-test end points
---
Regulation
Reg
---
±6
V dc
(500 hours)
Voltage drop (1)
Etd
142
155
V dc
Voltage drop (2)
Etd
142
155
V dc
Voltage drop (3)
Etd
142
155
V dc
Change in voltage drop (3) of
Etd
---
6
V dc
individual tubes
Ionization voltage (1)
Ez
---
165
V dc
See notes at end of table.
3
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