MIL-PRF-1/1617D
TABLE I. Testing and inspection.
Limits
MIL-STD-1311
Inspection
Unit
Conditions
Symbol
Method
min
max
Conformance inspection, part 1
µA dc
Total grid current 3/ 4/
1266
Ic1
0
-0.2
Electrode current (1)
1256
Ib
9.0
19.0
mA dc
(anode)
µA dc
Electrode current (2)
1256
Ec1 = -10 V dc
Ib
---
50
(anode)
Electrode current (screen)
1256
Ic2
---
6.0
mA dc
µmhos
Transconductance (1)
1306
Sm
10,000
18,000
ĆSm
Transconductance (2)
1306
Ef = 5.7 V
---
15
%
Ef
µmhos
Transconductance (3)
1306
Eb = Ec2 = 150 V;
Sm
2,600
3,700
Rk = 4,000 ohms;
Ec1 = +2.5 V dc
µmhos
Transconductance (4)
1306
Eb = Ec2 = 150 V;
Sm
6,500
9,450
Rk = 4,000 ohms;
Ec1 = +20 V dc
Short and discontinuity detection
1201
---
---
---
---
Conformance inspection, part 2
Low-frequency vibration
1031
Rp = 2,000 ohms
Ep
---
500
mV ac
Heater current
1301
If
280
320
mA
µA dc
Heater-cathode leakage
1336
Ihk
---
20
Direct-interelectrode capacitance
1331
Shield no. 315
Cgp
---
0.06
pF
Cin
7.0
7.7
pF
Cout
2.6
3.3
pF
Insulation of electrodes
1211
R
200
---
Meg
Base strain
1121
---
---
---
---
Envelope strain
2125
---
---
---
---
Permanence of marking
1105
---
---
---
---
Conformance inspection, part 3
Intermittent life
1501
Group A;
---
---
---
---
Ehk = 100 V
Intermittent life-test end-points
(500 hours):
µmhos
Transconductance (1)
1306
Sm
8,500
---
µA dc
Total grid current 3/
1266
Ic1
---
-0.25
ĆSm
Transconductance (3)
1306
Eb = Ec2 = 150 V;
---
-5
%
Rk = 4,000 ohms;
t
Ec1 = +2.5 V dc
MegΩ
Insulation of electrodes
1211
R
50
---
See footnotes at end of table.
2
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