MIL-PRF-1/1331F
TABLE I. Testing and inspection - Continued.
Inspection
Method
Conditions
Acceptance Symbol
Limits
Unit
MIL-STD-
level
10/
Min
Max
1311
Conformance inspection,
part 2 - Continued
---
---
g1 - g2; Ec2 = 300 V dc;
Mu
4.0
6.0
Amplification factor
1316
Ic2 = 50 mA dc;
anode floating
pF
0.05
Cgp
---
1331
EIA standard shield No. 320
Direct-interelectrode
pF
17.0
----
Cin
14.5
and No. 321, or equal
capacitance
pF
4.45
Cout
3.7
150
---
---
Ihk
Heater-cathode leakage
1336
Ehk = +150 V dc;
µA dc
150
---
Ihk
Ehk = -150 V dc
µA dc
Conformance inspection,
part 3
Life-test (1) provisions
---
---
Group C;
---
---
---
---
power output (1);
t= 500 hours
---
Life-test (1) end points:
ma
+100
---
---
Ef = 26.5 V ac
2212
Pulsing emission
Ćik
-100
---
---
1266
Primary grid emission
µA dc
Isg1
(control)
-250
---
---
1266
Primary gird emission
Isg2
µA dc
(screen)
150
---
---
Ehk = +150 V dc
1336
Heater-cathode leakage
Ihk
µA dc
150
---
Ehk = -150 V dc
Ihk
µA dc
---
---
---
---
---
Life-test (2) provisions
---
Group C;
Ec1 = Ec2 = Eb = 0;
Ef = 29.1 V ac;
t = 500 hours
Life-test (2) end point:
---
Interelement leakage
1366
Supply voltage = 500 V dc;
Rs = 2.5 MegΩ
resistance (cold)
MegΩ
---
Rg1g2
10
g2 positive
MegΩ
---
---
10
Rg2k
g2 positive
MegΩ
---
10
Rg1k
g1 negative 7/
Life-test (3) provisions
---
Group D;
---
---
---
---
---
power output (2)
t = 500 hours 9/
---
Life-test (3) end points:
ma
+100
---
---
Ef = 26.5 V ac
2212
Pulsing emission
Ćik
-100
---
---
1266
Primary grid emission
µA dc
Isg1
(control)
-250
---
---
1266
Primary grid emission
Isg2
µA dc
(screen)
150
---
---
Ehk = +150 V dc
1336
Heater-cathode leakage
Ihk
µA dc
150
---
Ehk = -150 V dc
Ihk
µA dc
See footnotes at end of table.
3
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