MIL-PRF-1/343C
TABLE I. Testing and inspection.
Inspection
Method
Notes
Conditions
Acceptance
Inspection
Symbol
Limits
Limits
Unit
level
level or code
Min
Max
Conformance
inspection, part 1
µA dc
1266
2
Total grid current
1.0
II
Ic
0
-1.0
1341
2
Esig = 3.2 Vac;
Power output (2)
1.0
II
Po
140
---
mW
Ef = 1.1 V dc (prl);
Rp = 0.01 Meg
Electrode current
1256
---
1.0
II
Ib
6.5
12.5
mA dc
(anode)
Audio frequency noise
1246
1
Ecal (0 vu) =
1.0
II
EB
---
0
vu
2.63 Vac;
Ecal (50 mW)
= 400 mV dc;
Rg1 = 0.1 meg;
Rg2 = 1,000 Ω;
Ecc2 = 55 V dc;
Rp = 25,000 Ω;
Ef = 2.8 V dc
Short and discontinuity
1201
---
0.4
II
---
---
---
---
40 G
detection
Conformance
inspection, part 2
Filament current
1301
---
---
---
If
88
112
mA dc
Electrode current
1256
---
---
---
Ic2
1.3
3.1
mA dc
(screen grid)
µmhos
Transconductance
1306
---
Sm
2,500
---
---
1,800
Power output (1)
1341
---
Esig = 3.2 Vac;
---
---
Po
210
---
mW
Rp = 0.01 Meg
Direct-interelectrode
1331
---
capacitance
3Q4
---
---
---
0.41
pF
---
Cg1-p
3V4
---
---
---
0.40
pF
---
Cg1-p
3Q4
---
Without shield
---
3.8
7.2
pF
---
Cin
3V4
---
---
3.8
7.3
pF
---
Cin
3Q4
---
---
2.4
5.6
pF
---
Cout
3V4
---
---
2.2
5.4
pF
---
Cout
Rp = 2,000 Ω
Low-frequency vibration
1031
---
---
---
400
mV ac
---
Ep
Insulation of electrodes
1211
---
---
---
---
---
---
---
Base strain
1121
---
---
---
---
---
---
---
Glass strain
2126
---
---
---
---
---
---
---
Permanence of marking
1105
---
---
---
---
---
---
---
See footnotes at end of table I.
2
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