MIL-PRF-1/1097J
TABLE I. Testing and inspection - Continued.
MIL-
Limits
STD-
Requirement or test
Conditions
Symbol
Unit
1311
Min
Max
method
Conformance inspection,
part 3
1506
Ef = 7.5 V; heaters in
---
---
---
---
Heater-cycling life
parallel; Ehk = 135 Vdc
---
Heater-cycling life-test
end point:
μAdc
1336
Ihk
---
15
Heater-cathode leakage
1516
---
---
---
---
Test condition (1);
Stability life
Ehk = 135 Vdc;
Rg/g = 0.5 MegΩ; TA = room
---
Stability life-test end point:
ĆSm
1306
---
10
%
Change in transconduc-
tance (1) of individual tubes
t
---
---
---
1501
Intermittent life
Test condition (1);
---
Ehk = 135 Vdc;
Rg/g = 0.5 MegΩ;
TE = 165°C (min)
(see note 5)
---
Intermittent life-test end
points (1,000 hours):
---
---
---
---
Inoperatives
---
μAdc
0
-0.7
1266
Total grid current
Ic
142
164
mA
1301
Heater current
If
ĆSm
---
25
%
1306
Change in transconduc-
tance (1) of individual
t
tubes
ĆSm
---
20
%
1306
Transconductance (2)
Ef
μAdc
---
7
1336
Heater-cathode leakage
Ihk
MegΩ
100
---
1211
Insulation of electrodes
R
---
---
---
Total defectives
---
---
---
---
1501
Intermittent life (pulse)
---
Test condition (2);
---
Eb = 300 Vdc;
Rb/p = 150 ohms
(see note 10)
---
Intermittent pulse life-test
end points (1,000 hours):
---
---
---
Inoperatives
---
---
280
---
1296
Pulse current (1)
mA
ik
(cathode)
---
50
1511
Cathode interface life
ohms
Ef = 6.9 V; heaters in
Ri
parallel
(see note 8)
See notes on top of next page.
4
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