MIL-PRF-1/1757B
TABLE I. Testing and Inspection.
Inspection
Method
Conditions
Symbol
Limits
Unit
Min
Max
Conformance
inspection, part 1
1/
A
1.05
0.90
If
1301
Heater current
V dc
-9.5
-4.5
Ec
1261
Electrode voltage (1) (grid)
µA dc
-8.0
----
Ic
1266
Total grid current
----
50
Rgk
Eb = Ek = 0;
1211
Insulation of electrodes
Meg ohm
Ec = -500 V dc
200
----
etd
eb = ec = etd/is = 6.0 a;
1231
Pulsing emission
V
tp = 3 µs (max);
prr = 600 (max)
Conformance
inspection, part 2
V dc
-25.0
----
Eco
Ec/Ib = 1.0 mA dc
1261
Electrode voltage (2)
(grid) 3/
pF
7.80
6.60
Cin
Fixture in accordance with
1331
Direct-interelectrode
pF
1.90
1.65
Cgp
Drawing 158-JAN
capacitance (grounded
pF
0.035
----
Cout
cathode connection)
----
----
----
----
No voltages
----
Resonance
4/
dB
----
6
G
F= 1,100 ±50 MHz; Ebb =
----
Power gain 2/
2,200 V dc; Ecc = -45 V dc;
tp = 3 µs (min); Du = 0.002
(min); pd = 400 w (peak)
Conformance
inspection, part 3
----
----
Group C; Ef = 6.0 V; filament
----
----
----
Life test 5/
standby; t = 500 hours
Ćib
%
25
----
----
Life-test end point 5/
ĆCgp
pF
0.15
----
mV ac
250
F = 55 to 500 to 55 Hz;
----
1031
Variable-frequency
Ep
Accel = 10 G peak (min); Ebb
vibration 6/ 7/
= 300 V dc;
Rp = 10,000 ohms;
Ec/Ib = 10 mA dc
----
----
----
1002
Barometric pressure,
Pressure = 35 mmHg (max);
----
reduced 6/ 9/
voltage = 1,800 V ac;
TA = 30º± 10ºC
See footnotes at end of table.
3
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