MIL-PRF-1/29E
TABLE 1. Testing and Inspection.
Mil-Std-1311
Unit
Symbol
Limits
Requirement or
test
Method
Conditions
Min
Max
Conformance
inspection, part 1
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Ef =1.2 V; Zp/ib
1353
Operation of
= 8.5 mA (min)
rectifiers
(see notes 2 and
3)
mA dc
9.5
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Is
1231
Ef = 1.35 V:
Emission current
Eb = 100 V dc
Conformance
inspection, part 2
mA
285
245
If
1301
Filament current
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No voltages
1031
Low-frequency
vibration
1101
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Secureness of
base, cap, or insert
1105
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Permanence of
marking
Conformance
inspection, part 3
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Group A; 250
1501
Intermittent life
hours
with Ef = 1.25 V,
or 500 hours
with
Ef=1.2 V;
mA dc
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8.5
Is
Zp/ib = mA
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Intermittent life-test
end point
Failure to rectify
and emission
NOTES:
1/
The supply source impedance shall be at least 300,000 ohms.
2/
The tube shall be operated in a half-wave rectifier circuit at 50 to 60 Hz. Apply heater and anode voltage
simultaneously to cold tube. After cathode has reached operating temperature, key anode current three times,
no arcing shall occur.
3/
This test to be performed at the conclusion of the holding period.
2
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