MIL-PRF-1/889J
TABLE I. Group A inspection.
Conditions
Acceptance
Symbol
Limits
Unit
Inspection
Method
MIL-STD-
1311
level 12/
min
max
Conformance
inspection, part 1
Ic2
1256
0.65
Electrode current (screen)
mAdc
+3.0
-7.0
Type 7203
mAdc
0.0
-7.0
Type 7203A
Vdc
-45.0
1261
0.65
-32.0
Electrode voltage (grid)
Ec1
μAdc
Eb = 2,000 Vdc;
-15
1266
0.65
---
Total grid current
7/
Ic1
Ec1/Ib = 125 mAdc
μAdc
-250
1266
0.65
---
Primary grid emission
Isg1
Ic1 = 70 mAdc;
(control)
t = 120; anode and
screen
grid floating
μAdc
-250
1266
0.65
---
Primary grid emission
Isg2
(screen)
Ec1 = 0; t = 120;
Ic2 = 100 mAdc;
anode floating
2.90
1301
0.65
2.30
Heater current
If
Aac
18
1372
0.65
8
Current division
egk
V
200
---
(long pulse)
ic1
Eb = Ec2 = 250 Vdc;
ma
260
---
ic2
Ec1 = -100 Vdc;
ma
egk/ib = 1.0 a;
prr = 11.0 ±1.0;
tp = 4,500 μs (min)
Δik
200
2212
0.65
---
Pulse emission
6/
ma
Eb = Ec2 = 250 Vdc;
Ec1 = -100 Vdc;
egk/ik = 1.5 a;
Ef = 5.4 V ac;
prr = -11.0 ±1.0;
tp = 4,500 μs (min)
Conformance
inspection, part 2
---
---
---
---
No voltages
1031
Low-frequency vibration 10/
Shock, specified pulse 10/
---
---
---
---
No voltages;
1042
15 G (min);
11 ±2 ms; half sine wave
Direct-inter-electrode
capacitance
pF
0.06
---
Cgp
1331
EIA standard shields
pF
17.2
14.2
Cin
No. 320 and 321, or
pF
5.0
4.0
Cout
Heater-cathode leakage
equivalent
μAdc
150
---
Ihk
1336
Ehk = +150 Vdc;
μAdc
150
---
Ihk
Ehk = -150 Vdc
See footnotes at end of table.
2
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