MIL-PRF-1/191E
TABLE I. Testing and Inspection.
Method
Requirement or test
Conditions
Symbol
Limits
Unit
MIL-STD-1311
Min
Max
First Article inspection
1216
Base material insulating
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quality
Conformance
inspection, part 1
µA dc
1266
See note 2
Ic
0
-3.0
Total grid current
1256
Ib
22.5
57.5
Electrode current (anode)
mA dc
1341
Esig = 40 V ac;
Po
4.3
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Power output
W
Rp = 1,100 ohms
(see note 2)
1246
Esig = 700 mV ac;
EB
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17
Audio frequency noise
vu
Rp - 2,000 ohms;
Ef = 6.3 V dc
1231
Is
140
---
Eb = Ec = 30 V dc
Emission
mA dc
1201
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---
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Short and discontinuity
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detection
Conformance
inspection, part 2
1031
Ec = 70 V dc;
Ep
---
500
mV ac
Low-frequency vibration
Rp = 2,000 ohms
1301
If
1.08
1.32
A
Filament current
µmhos
1306
Sm
3,200
4,800
Transconductance
1316
Mu
3.7
4.3
Amplification factor
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1211
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Insulation of electrodes
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1101
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Secureness of base, cap,
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or insert
1111
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Base pin solder depth
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1105
Permanence of marking
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---
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Conformance
inspection, part 3
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Group A
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---
---
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Life-test provisions
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Power output
Po
2.75
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W
Life-test end point
(500 hours)
NOTES:
1. Tube types 2A3 and 6A3 are hereby deleted from this tube specification sheet.
2. This test to be performed at the conclusion of the holding period.
3. Pin 7 is to be connected to ground for equipment application.
2
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