MIL-PRF-1/1655E
TABLE I. Test conditions - Continued.
Limits
MIL-
Acceptance
Unit
STD-
Requirement or test
Notes
Conditions
level
Symbol
1311
(see note 13)
Min
Max
Method
Conformance
inspection, part 2
-Continued
---
Post-shock and
sweep-frequency
vibration fatigue-
test end points:
1031
Sweep-frequency
---
Ep
---
500
mV ac
vibration
1336
Heater-cathode
---
Ihk
---
75
ľA dc
leakage
ĆSm
1306
Transconductance
---
---
10
%
(1)
t
1266
Total grid current
---
Ic
0
-1.5
ľA dc
1261
Electrode voltage
6
Rk = 0; Ec = 0;
---
Eb
---
70
V dc
(anode)
Eb/Ik = 200 mA dc
1131
Metallic base sleeve
---
---
---
---
---
quality
1105
Permanence of
---
---
---
---
---
marking
Conformance
inspection, part 3
1506
Heater-cycling life
Ef = 7.5 V;
---
---
---
---
---
Ehk = 300 V ac;
Eb = Ec = 0;
1 min "on" 4 min
"off"
---
Heater-cycling
life-test end points:
1336
Heater-cathode
---
Ihk
---
75
ľA dc
leakage
See footnotes at end of table.
5
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