MIL-PRF-1/1069G
MIL-STD-
1311
Unit
Requirement or test
Notes
Conditions
Symbol
Limits
method
Min
Max
Conformance
inspection, part 3
---
Ef = 7.5 V; Ehk = 140 V ac;
Heater-cycling life
1506
---
---
---
Eb = Ec1 = Ec2 = Ec3 = 0
Heater-cycling life-test
---
end point:
µA dc
Ihk
Heater-cathode leakage
1336
---
20
Ehk = 200 Vdc; Rg1 = 1.0 MegΩ;
---
Stability life
1516
---
---
---
TA = room
Stability life-test end
---
point:
ĆSm
Change in transcon-
1306
---
10
%
ductance (1) of
t
individual tubes
Ehk = 200 V dc; Rg1 = 1.0 MegΩ;
6, 8
Intermittent life
1501
---
---
---
---
TE = 200°C(min)
Intermittent life-test end
---
point (500 hours):
µA dc
Total grid current
1266
0
-0.5
Ic1
Heater current
1301
187
217
If
mA
ĆSm
Change in transcon-
1306
---
20
%
ductance (1) of
t
individual tubes
ĆSM
Transconductance (2)
1306
---
15
%
Ef
µA dc
Heater-cathode leakage
1336
---
10
Ink
MΩ
Insulation of electrodes
1211
50
---
R
Transconductance (1),
1306
---
15
Avg
%
ĆSm
average change
t
Intermittent life-test end
---
points (1,000 hours):
Total grid current
1266
0
-1.0
Ic1
µA dc
Heater current
1301
177
223
If
mA
ĆSm
Change in transcon-
1306
---
30
%
ductance (1) of
t
individual tubes
Heater-cathode leakage
1336
---
15
µA dc
Ihk
See notes at top of next page.
4
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