MIL-E-1/190K
TABLE I. Testing and inspection - Continued.
Limits
MIL-STD-1311
Requirement or test
Units
Conditions
Symbol
Method
Min
Max
Conformance inspection, part 2 -
Continued
Direct-inter-electrode capacitance
1331
No shield (see note 2)
Cgp
0.8
1.20
pF
No shield (see note 2)
Cin
1.30
2.10
pF
No shield; section 1
Cout
0.16
0.30
pF
No shield; section 2
Cout
0.21
0.35
pF
No shield;
Cgg
---
0.014
pF
No shield
Cpp
---
0.80
pF
Lead fatigue
1116
---
---
---
---
Envelope strain
2126
---
---
---
---
Shock
1041
450 G;
---
---
---
---
EhK = +100 V dc;
Rg = 0.1 MegΩ;
(see note 6)
Vibration fatigue
1031
2.5 G; fixed frequency;
---
---
---
---
F = 25 min, 60 max
Post-shock and vibration-fatigue
---
test end points:
Low-frequency vibration
1031
Ep
---
100
mV ac
Heater-cathode leakage
1336
Ihk
---
20
ľA dc
ΔSm
Change in transconductance (1)
1306
---
20
%
of individual tubes
t
Permanence of marking
1105
Conformance inspection, part 3
Heater-cycling life
1506
Ef = 7.0 V;
---
---
---
---
1 min "on", 4 min "off";
Ehk = 140 V ac;
Ec = Eb = 0
Stability life
1516
Eb = 150 V dc;
---
---
---
---
Ehk = +200 V dc;
Rg/g = 1.0 MegΩ;
Rk/k = 820 ohms;
TA = room
(see note 2)
Stability life-test end point:
---
ΔSm
Change in transconductance (1)
1306
---
10
%
of individual tubes
t
Intermittent life
1501
Stability life test,
(room temperature)
or equivalent
conditions; TA = room
---
Intermittent life-test end point
(room temperature)
(500 hours):
MegΩ
Insulation of electrodes
1211
R
50
---
3
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