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MIL-E-1/175J
TABLE I. Testing and inspection.
MIL-STD-1311
Requirement or test
Conditions
Symbol
Units
Limits
Test method
Min
Max
Conformance inspection,
part 1
1256
Electrode current (1)
See note 2
Ib
23
37
mA dc
(anode)
A dc
1256
Electrode current (2)
Ec1 = -40 V dc;
Ib
---
100
(anode)
Rk = 0
A dc
1266
Total grid current (1)
Rgl = 1.0 Meg
Icl
0
-1.0
(see note 2)
1301
Heater current
If
420
480
mA
A dc
1336
Heater-cathode leakage
Ihk
---
15
1341
Power output (1)
Esig = 6.4 V ac;
Po
0.75
---
W
Rp = 3,000 ohms
1201
Short and discontinuity
---
---
---
---
detection
Conformance inspection,
part 2
1211
Insulation of electrodes
R
50
---
Meg
1031
Low-frequency vibration
Rp = 2,000 ohms;
Ep
---
100
mV ac
15 G; F = 40 Hz
1246
Audio frequency noise
Ecal = 150 mV ac;
EB
---
17
vu
Ecc2 = 110 V dc;
Ecl = -8.7 V dc;
Rk = 0;
Rp = 2,000 ohms;
Rgl = 0.5 Meg;
Rg2 = 10,000 ohms;
Cg2 = 4.0 F
1256
Electrode current (screen)
Ic2
0
4.0
mA dc
A dc
1266
Grid currents
Ef = 7.5 V;
Is(gl)
0
-2.0
Ecl = -40 V dc;
Rgl = 1.0 Meg;
Rk = 0
(see note 3)
mhos
1306
Transconductance
Sm
3,500
4,900
1311
Anode resistance
rp
0.01
---
Meg
1331
Direct-interelectrode
0.405 in. dia shield
Cpq
---
0.20
pF
capacitance
Cin
5.5
7.5
pF
Cout
6.5
8.5
pF
ĆPo
1341
Power output (2)
Ef = 5.7 V;
---
15
%
Esig 6.5 V ac;
Ef
Rp - 3,000 ohms
1116
Lead fatigue
---
---
---
---
2

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