MIL-PRF-1/10J
TABLE I. Test conditions - Continued.
MIL-
Limits
Unit
STD-
Requirement or test
Conditions
Symbol
1311
Min
Max
Conformance inspection,
part 3 - Continued
1501
Intermittent life
Ehk = 135 Vdc;
---
---
---
---
Ec = -2 Vdc; Rg/g = 0.5 MegΩ;
TE = +165°C (min)
(see notes 9 and 10)
---
Intermittent life-test
end-points (1,000 hours):
---
Inoperatives
---
---
---
---
1266
Total grid current
Ic
0
-0.4
ľAdc
1301
Heater current
If
160
196
mA
ĆEp
1321
Change in AC ampli-
---
20
%
fication of individual
tubes
1336
Heater-cathode leakage
Ihk
---
10
ľAdc
MegΩ
1211
Insulation of electrodes
R
200
---
1511
Cathode interface life
Ef = 6.9 V; heaters in parallel
Ri
---
50
Ohms
(see note 2)
NOTES:
1. See "Reduced pressure (altitude) rating" and altitude, maximum peak voltage.
2. Test each unit separately.
3. This test shall be performed at the conclusion of the holding period.
4. Prior to this test, tubes shall be preheated a minimum of 5 minutes with all sections operating at
the conditions indicated below. The 3-minute test is not permitted. Test at specified conditions
within 3 seconds after preheating. Grid emission shall be the last test performed on the sample
selected for the grid-emission test.
Ef
Ec1
Eb
Rk/k
Rg/g
MegΩ
V
Vdc
Vdc
Ohms
15.0
-3.0
250
0
0.5
5. Tie 1k to 2k; 1g to 2g; and 1a to 2a.
5
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