MIL-PRF-1/4K
TABLE I. Requirement or test.
Limits
MIL-STD-1311
Conditions
Symbol
Requirement or test
Unit
method
Min
Max
Conformance inspection,
part 1
Heater current
1301
If
160
190
mA
µA dc
Heater-cathode leakage
1336
Ihk
---
10
Rg = 0.5 MegΩ
µA dc
Total grid current
1266
Ic1
0
-0.1
(see notes 2 and 3)
Electrode current (1)
1256
See note 2
Ib
5.0
11.0
mA dc
(anode)
µA dc
Electrode current (2)
1256
Ec1 = -10 V dc;
Ib
---
200
Rp = 0.1 MegΩ
(anode)
Electrode current
1256
Ic2
0.8
4.0
mA dc
(screen)
µmhos
Transconductance (1)
1306
Sm
3,800
6,200
Short and discontinuity
1201
---
---
---
---
detection
Conformance inspection,
part 2
Insulation of electrodes
1211
---
---
---
---
µA dc
Electrode current (3)
1256
Ec1 = -5.5 V dc
Ib
5.0
---
(anode)
ĆSm
Transconductance (2)
1306
Ef = 5.7 V
---
15
%
Ef
µA dc
Grid emission
1266
Ef = 7.5 V;
Isg
0
- 0.5
Ec1 = - 45 V;
Rg1 = 0.1 MegΩ
(See note 4)
See notes at end of table.
2
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