MIL-PRF-1/126F
TABLE I. Requirements and tests.
Limits
MIL-STD-1311
Requirement or test
Type
Conditions
Symbol
Unit
method
Min
Max
Conformance
inspection, part 1
µA dc
1266
a, b
See note 2
Ic1
0
-2.0
Total grid current
1256
a, b
Ib
33
57
Electrode current
mA dc
(anode)
1256
a, b
Ic2
0
7.5
Electrode current
mA dc
(screen grid)
Class A amplifier;
1341
a, b
Po
3.6
---
Power output
W
Esig = 8.8 V ac;
Rp = 5,000 ohms
Esig = 280 mV ac;
1246
a, b
EB
---
---
Audio frequency
VU
Rp = 2,000 ohms,
noise
(see note 3)
Eb = Ec2 = Ec1
1231
a, b
Is
100
---
Emission
mA dc
= 30 V dc
(see note 2)
1201
a, b
---
---
---
Shorts and discontinuity
---
detection
Conformance
inspection, part 2
1031
a, b
Ec1 = -25 V dc;
Ep
---
500
mV ac
Low-frequency
Rp = 2,000 ohms
vibration
1301
a, b
If
410
490
mA
Heater current
µA dc
1336
a, b
Ihk
---
50
Heater-cathode
leakage
µmhos
1306
a, b
Sm
3,000
5,200
Transconductance
1331
a
Cgp
---
0.9
No shield
Direct-interelectrode
pF
b
Cin
7.9
11.1
Shield No. 308
capacitance
pF
Cout
5.6
13.5
pF
1101
a
Secureness of base
---
---
---
wafer insert
---
b
---
---
---
1101
Secureness of base
---
a, b
---
---
---
1111
Base pin solder depth
See note 4.
---
MegΩ
a, b
---
10
---
1211
Insulation of electrodes
a, b
---
---
---
1105
Permanence of marking
---
See notes at the end of the table.
2
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