MIL-PRF-1/7J
TABLE I. Inspection tests - Continued.
Limits
MIL-STD-
Unit
1311
Requirement or test
Conditions
Symbol
method
MIN
MAX
Conformance inspection, part 3
- Continued
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Intermittent life-test end points
See note 11
(500 hours):
1301
Heater current
If
275
330
mA
1231
Emission (1)
Is
35
---
mA dc
ΔIs
1231
Emission (2)
---
20
%
Ef
μA dc
1336
Heater-cathode leakage
Ihk
---
10
MegΏ
1211
Insulation of electrodes
R
100
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Intermittent life-test end points
(1,000 hours):
See note 11
1231
Heater current
If
275
333
mA
1231
Emission (1)
Is
30
---
mA dc
ΔIs
Emission (2)
---
25
%
1336
Ef
μA dc
1211
Heater-cathode leakage
Ihk
---
10
MegΏ
---
Insulation of electrodes
R
75
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NOTES:
1. The maximum voltage appearing between any pair of pins shall be no greater than the peak inverse anode voltage rating.
2. See "Reduced pressure (altitude) rating", and altitude, maximum peak voltage in the basic document.
3. Test each unit separately.
4. In a full-wave circuit, adjust Zp/a so that a bogey tube gives Io = 18 mA dc. A bogey tube has a voltage drop of
Etd = 10 V dc at Is = 60 mA dc per anode. Ehk = Eo + 117 V ac.
5. This test shall be performed at the conclusion of the holding period.
6. Test at Eb = 7.0 V ac with readings at Ef = 6.3 V and Ef = 5.7 V.
4
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