MIL-PRF-1/1655E
TABLE I. Test conditions.
Limits
MIL-
Acceptance
Unit
STD-
Requirement or test
Notes
Conditions
level
Symbol
1311
(see note 13)
Min
Max
Method
Qualification
inspection
1216
Base material
Glass-bonded
---
---
---
---
---
insulating quality
mica, zone 5
minimum
1031
Variable-frequency
4
Ec1 = -7 V dc;
---
Ep
---
500
mV ac
vibration
Rk = 0;
Rp = 2,000 ohms
Conformance
inspection, part 1
1256
Electrode current
6,7,8
0.4
Ib
100
150
mA dc
(1) anode
Rg = 1.0 MegΩ;
1266
Total grid current
4,8
0.4
Ic
0
-1.0
µA dc
Rk = 125 ohms
1301
Heater current
0.4
If
2.25
2.65
A
1306
Transconductance (1)
6,7,9
0.4
Sm
6,000
8,200
µmhos
1336
Heater-cathode
8
Ehk = +450 V dc;
0.4
Ihk
---
50
µA dc
leakage
Ehk = -450 V dc
1201
Short and discon-
0.4
---
---
---
---
tinuity detection
Conformance
inspection, part 2
MegΩ
1211
Insulation of
6
2.5
R
200
---
electrodes
1256
Electrode current (2)
6,7
Eb = 250 V dc;
2.5
Ib
---
10
µA dc
(anode)
Ec = 250 V dc
ĆSm
1306
Transconductance (2)
6,7,9
Ef = 5.7 V
2.5
---
10
%
Ef
1316
Amplification factor
6,7,9
Rk = 250 ohms
---
Mu
1.5
2.5
---
See footnotes at end of table.
3
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