MIL-PRF-1/49F
TABLE I. Requirements or tests.
MIL-STD-
Unit
Limits
1311
Requirement or test
Conditions
Symbol
Acceptance
method
Level
Min
Max
(see note 6)
First article inspection
---
---
---
1216
---
Base material insulating
---
quality
Conformance inspection,
part 1
Electrode current (1)
1256
See note 3
0.65
Ib
100
150
mA dc
(anode)
1256
Electrode current (2)
Ec = -200 V dc;
0.65
Ib
---
10
mA dc
(anode)
Eb = 250 V dc
See note 3
Rg = 1.0 Meg Ώ
μA dc
1266
Total grid current
0.65
Ic
0
-4.0
See notes 2 and 4
1231
Emission current
Eb = Ec = 10 V dc
0.65
Is
75
---
mA dc
See note 5
1201
Shorts and discontinuity
0.4
---
---
---
---
detection
Conformance inspection,
part 2
A
2.74
2.26
If
6.5
Heater current
1301
μA dc
50
---
Ihk
6.5
See note 1
Heater-cathode leakage
1336
mV ac
200
---
Ep
6.5
Rp = 2,000 ohms;
Low-frequency vibration
1031
Ec = -7 V dc;
Rk = 0
See note 1
μmhos
8,200
5,800
Sm
6.5
See note 3
Transconductance
1306
---
2.6
1.4
µ
6.5
See note 3
Amplification factor
1316
---
---
---
---
---
Permanence of marking
1105
---
---
---
---
6.5
Secureness of base,
1101
base insert, and cap
---
---
---
---
6.5
Base pin solder depth
1111
See footnotes at end of table.
2