MIL-PRF-1/864F
TABLE I. Testing and inspection.
Method
Acceptance
Limits
Inspection
Notes
Conditions
Symbol
Unit
MIL-STD-
Level
Min
Max
1311
note 4
Conformance inspection, part 1
Rgl = 0.25 MegΩ
Total grid current
1266
2
0.65
Ic1
0
-2.0
µA dc
Electrode current (1)
1256
-
0.65
Ib
20
40
mA dc
(anode)
Eb = 50 V dc
Electrode current (2)
1256
-
Ec1 = 0
0.65
Ib
26
46
mA dc
(anode)
Ec2 = 100 V dc
Electrode current (3)
1256
-
Ec1 = -13 V dc
0.65
Ib
---
300
µA dc
(anode)
Transconductance (1)
1306
-
0.65
Sm
9,200
14.000
µmhos
Eb = Ec1 = Ec2
Emission
1231
-
0.65
Is
180
---
mA dc
20Vdc
Short and discontinuity
1201
-
0.4
---
---
---
---
detection
Conformance inspection,
part 2
MegΩ
Insulation of electrodes
1211
-
4.0
R
100
---
Heater current
1301
-
4.0
If
610
690
mA
Heater-cathode leakage
1301
-
4.0
Ihk
---
40
µA dc
Electrode current (screen)
1256
-
4.0
Ic2
---
9.0
mA dc
Transconductance (2)
1306
-
Ef = 5.5 V
---
Sm
8,700
---
µmhos
Power output
1341
3
Esig = 2.1 V ac
---
Po
2.0
---
W
Rp = 7,500 ohms
Audio frequency noise
1246
Esig = 100 mV ac
2.5
EB
---
17
vu
Ebb = 225 V dc
Ecc2 = 225 V dc
Ec1 = 0
-
Rk = 150 ohms
Rp = 10,000 ohms
Rg1 = 0.25 MegΩ
Rg2 = 5,000 ohms
Cg2 = 0
Direct-interelectrode
1331
-
No shield
---
Cg1p
---
0.12
pF
capacitance
Cin
9.0
13.6
pF
Cout
3.9
7.2
pF
Low-frequency vibration
1031
-
Rp = 2,000 ohms
---
Ep
---
1,000
mV ac
Base strain
1121
-
---
---
---
---
---
Glass strain
2126
-
---
---
---
---
---
Permanence of marking
1105
-
---
---
---
---
---
2