MIL-PRF-1/1679C
TABLE I. Testing and inspection - Continued.
Limits
Method
Inspection
Notes
Conditions
Symbol
Unit
MIL-STD-1311
Min
Max
Conformance inspection
part 3
3/ 8/ Group C;
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Life test (1)
13/ Ebb = 20 kV dc;
14/ Ec1 = -800 V dc
Ec2 = 1,250 V dc;
R = 1,030 to
1,070 ohms;
Du = 0.001;
t = 500 hours
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Life-test end points (1)
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1356
iL
15
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a
Grid-pulse
ĆiL
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15
%
operation (2)
µA dc
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1266
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-100
Total grid current
Ic1
---
1231
40
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Peak emission
a
is
µA dc
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1266
---
-50
Primary grid emission
Isg1
(control)
µA dc
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1266
---
-150
Primary gird emission
Isg2
(screen)
9/ 13/ Group C;
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Life test (2)
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14/ Ef = 27 V
Ec1 = -90 V dc
(min); anode and
screen grid floating;
t = 500 hours
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Life-test end point (2)
9/
1301
1.95
2.35
Heater current
If
Ef = 27 V
A
5/ 12/ Ef = 24 V;
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1.5
Vibration
Ep
V ac
Ebb = 250 V dc;
R = 2,500 ohms;
Ec2 = 90 V dc;
Ec1/Ib = 5.0 mA dc;
F = 10 to 200 Hz;
DA = 0.08 inch;
10 to 50 Hz;
accel = 10G;
50 to 200 Hz
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Vibration end point:
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1356
16
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Grid-pulse
iL
a
ĆiL
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10
operation (2)
%
Never negative
Ic2
See footnotes at end of table.
3
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