MIL-PRF-1/1404E
TABLE I. Testing and inspection - Continued.
Inspection
Method
Notes
Conditions
Acceptance
Symbol
Limits
Unit
MIL-STD-
Level
12/
Min
Max
1311
Conformance inspection,
part 2 - Continued
---
Post-shock test
end-points:
300
If
---
---
1301
Filament current (1)
---
mA dc
26
Ib
---
----
1256
Electrode current (1)
---
mA dc
(anode)
---
Ic1
---
---
1266
Total grid current
-1.5
µA dc
5,300
Sm
---
---
1306
Transconductance
---
µmhos
Vibration fatigue
---
3/ 9/
No voltages applied
---
---
---
---
---
---
Post-vibration fatigue
test end points:
300
If
---
---
1301
mA dc
Filament current (1)
---
26
Ib
---
---
1256
mA dc
Electrode current (1)
----
(anode)
---
Ic1
---
---
1266
Total grid current
-1.5
µA dc
5,300
Sm
---
---
1306
Transconductance
---
µmhos
1.0
If
320
370
mA dc
Filament current (1)
1301
---
Ef = 2.5 V dc
(series connected)
Filament current (2)
1301
---
Ef = 1.25 V dc
4.0
If
640
740
mA dc
(parallel connected)
Transconductance
1306
---
4.0
Sm
5,800
9,200
µmhos
Base strain
1121
---
---
---
---
---
---
Glass strain
2126
---
2.5
---
---
---
---
Insulation of electrodes
1211
---
4.0
---
---
---
---
Permanence of marking
1105
---
---
---
---
---
---
See footnotes at end of table.
4
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