MIL-PRF-1/1756B
TABLE I. Testing and Inspection.
Limits
Conditions
Unit
Symbol
Inspection
Method
Min
Max
Conformance inspection,
part 1 1/
A
1.05
0.90
If
1301
Heater current
V dc
-5.5
-0.5
Ec
1261
Electrode voltage (1) (grid)
µA dc
-8.0
----
Ic
1266
Total grid current
Meg
----
50
Rgk
Eb = Ek = 0;
1211
Insulation of electrodes
Ec = -500 V dc
V
200
----
etd
eb = ec = etd/is = 6.0 a;
1231
Pulsing emission
tp = 3 µs (max);
prr = 600 (max)
----
180
150
Mu
Eb = 500 V dc;
1316
Amplification factor
Ib = 50 mA dc
Conformance inspection,
part 2
V dc
-25.0
----
Eco
Ec/Ib = 1.0 mA dc
1261
Electrode voltage (2)
(grid) 2/
pF
7.50
6.30
Cin
Fixture.
1331
Direct-interelectrode
pF
2.15
1.85
Cgp
capacitance (grounded
pF
0.035
----
Cout
cathode connection)
----
----
----
----
No voltages
----
Resonance
3/
Conformance inspection,
part 3
----
----
----
Group C; Ef = 6.0 V; filament
----
Life test 4/
----
standby; t = 500 hours
%
25
----
----
Life-test end point 4/
Ćib
mV ac
250
----
F = 55 to 500 to 55 Hz;
1031
Variable-frequency
Ep
Accel = 10 G peak (min);
vibration 5/ 6/
Ebb = 400 V dc; Rp = 10,000
ohms; Ec/Ib = 10 mA dc
----
----
----
Pressure = 35 mmHg (max);
----
Barometric pressure,
1002
voltage = 1,800 V ac;
reduced 5/ 8/
TA = 30ºC ±10ºC
See footnotes at end of table.
3
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