MIL-PRF-1/1295F
TABLE I. Testing and inspection.
Inspection
Method
Conditions
Acceptance Symbol
Limits
Unit
MIL-STD-
Level
4/
Min
Max
1311
Conformance inspection,
part 1
mA
165
135
If
---
1301
Heater current
Heater-cathode leakage
1336
1
Ihk
---
50
Ehk = ±100
µA dc
1/
1
Ic1
---
-0.3
Total grid current
1266
µA dc
1/
1
Ib
2.6
4.5
mA dc
1256
Electrode current (1)
(anode)
Electrode current
1256
1
Ic2
---
1.0
mA dc
(screen grid)
Transconductance
1306
1
Sm
2,050
3,650
µmhos
Conformance inspection,
part 2
Electrode current (2)
1256
Ec1 = -10 V dc
2.5
Ibo
---
100
µA dc
(anode) (idling)
Cgp
1331
Unshielded
---
Direct-interelectrode
---
.040
PF
Cin
capacitance
3.0
5.0
pF
Cout
17.0
2.3
pF
High-frequency vibration 2/
1031
Rp = 2,000 ohms; no voltages
---
Ep
---
200
mV ac
Insulation of electrodes 2/
1211
---
---
---
---
---
Permanence of marking
1105
---
---
---
---
---
Shock 2/
1041
---
---
---
---
---
30° hammer angle
Conformance inspection,
part 3
Intermittent life
1501
Group D
---
t
500
---
Hrs
Eb = 3,000 V dc;
Ec2 = 100 V dc;
RK = 2,500 ohms;
Ehk = +100 V dc
-
---
Intermittent life test
end points (500 hours)
mA dc
---
2.0
---
---
1256
Electrode current (1)
(anode)
25%
---
---
1306
Transconductance
ĆSm
µmhos
(change of individual
t
tubes)
1/
This test shall be performed at the conclusion of the holding period.
2/
This test shall be conducted on the initial lot and thereafter on a lot approximately every 12 months. W hen one lot has passed, the
12-month rule shall apply. In the event of lot failure, the lot shall be rejected and the succeeding lots shall be subjected to this test
until a lot passes. (See 4/.)
3/
Revision letters are not used to denote changes due to the extensiveness of the changes.
4/
This specification sheet uses accept on zero defect sampling in accordance with MIL-PRF-1, table III.
2
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