MIL-PRF-1/839F
TABLE I. Requirements.
Method of
Acceptance
Limits
Unit
MIL-STD-
Requirement or test
Notes
Conditions
level
Symbol
Min
Max
1311
(see note 10)
Conformance
inspection, part 1
1301
Heater current
0.4
If
420
480
mA
µA dc
1336
Heater-cathode
0.4
Ihk
---
20
leakage
µA dc
1266
Total grid current
2
0.4
Ic1
0
-2.0
1256
Electrode current (1)
2
0.4
Ib
25
43
mA dc
(anode)
1341
Power output
Esig = 4.25 V ac;
0.4
Po
1.0
---
W
RL = 2,500 ohms
1201
Short and discontinuity
0.4
---
---
---
---
detection
Conformance
inspection, part 2
1211
Insulation of electrodes
2.5
R
---
---
---
1256
Electrode current (1)
2.5
Ic2
6.0
16.0
mA dc
(screen grid)
1256
Electrode current (2)
Ec1 = -20 V dc
2.5
Ib
---
1.0
mA dc
(anode)
µmhos
1306
Transconductance (1)
2.5
Sm
7,000
10,000
µA dc
1266
Grid emission
3
Ef = 7.5 V; Ec1
2.5
Ic1
0
-4.0
= -45 V dc; Rg1
= 0.01 MΩ (min)
ĆSm
1306
Transconductance (2)
Ef = 5.7 V
2.5
---
10
%
Ef
1231
Emission
Eb = Ec2 = Ec1
2.5
Is
100
---
mA dc
= 15 V dc
---
2201
Noise and
Esig = 500 mV ac
2.5
---
---
---
microphonics
Rp = 2,000 ohms
Rg1 = 0.1 MΩ
See footnotes at end of table.
2
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