MIL-PRF-1/338J
TABLE I. Testing and inspection.
Inspection
Method
Notes
Conditions
Symbol
Limits
Limits
Unit
MIL-STD-1311
Min
Max
Conformance
inspection, part 1
A dc
Total grid current
1266
1
Eb = 500 V dc;
Ic1
0
-3.0
Ec2 = 200 V dc;
Ec1/ Ib = 20 mA dc
Emission
1231
1
Eb = Ec1= Ec2
Is
130
---
mA dc
= 25 V dc
Electrode current
1256
Eb = 200 V dc;
Ib
23
47
mA dc
(anode)
Ec2 = 135 V dc;
Ec1 = -10 V dc
Electrode current
1256
Eb = 200 V dc;
Ic2
---
4
mA dc
(screen)
Ec2 = 135 V dc;
Ec1 = -10 V dc
Short and discontinuity
---
---
---
---
---
detection
Conformance
inspection, part 2
mA
Heater current
1301
If
740
860
A dc
Heater-cathode leakage
1336
Ihk
---
50
Power oscillation (1)
1236
Eb = 500 V dc;
Po
18
---
W
Ec2 = 200 V dc;
(useful
Ib = 60 mA dc;
power)
Ic1 = 2 mA dc;
Rg1 = 15,000 ;
F = 15 MHz
Direct-interelectrode
1331
2
Cg1a
---
0.2
pF
No shield
capacitance
Cin
11.6
14.4
pF
Cout
6.0
8.0
pF
Low-frequency vibration
1031
Ep
---
500
mV ac
Eb = 250 V dc;
Ec2 = 200 V dc;
Ec1/Ib = 10 mA dc;
Rp = 2,000
Secureness of base,
1101
3
---
---
---
---
cap, or insert
---
Base pin solder depth
1111
3
---
---
---
---
Permanence of marking
1105
3
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---
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See footnotes at end of table I.
2
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