MIL-PRF-1/868F
TABLE I. Testing and Inspection
Limits
Method
Acceptance
Inspection
Conditions
Symbol
Unit
MIL-STD-
level
Min
Max
1311
note 8
Conformance inspection, part 1
0.65
etd
---
190
V
Pulse emission
1231
prr = 500; tp = 2.0
µs; (eb=ec)/is =
2.5 a
Total grid current
1266
0.65
Ic
---
-0.5
µA dc
200
---
mW
0.65
Po
Power oscillation
1236
Rk = Rg = 0;
starting
(pulsed)
eb = 1,400 v;
voltage
tp = 1.0 µs ±10%;
prr = 1,000 ±10%;
Du = 0.001 ±10%;
F = 3,000 MHz (min);
ib = 1.5 a (max);
t = 30 sec (min)
see notes 2,3 and
Dwg 209-JAN
Transconductance
1306
0.65
Sm
4,400
5,700
µmhos
Electrode current
1256
0.65
Ib
12
21
mA dc
(anode)
Conformance inspection,
part 2
MegΩ
Insulation of electrodes
1211
E(g to all)= -100 V dc
---
R
100
---
E(sh to all)=-500 V dc
Heater current
1301
---
If
700
800
mA dc
Electrode voltage
1261
Ec/Ib = 10 µAdc
---
Eco
---
-26
V dc
(cutoff) (grid)
Heater-cathode
1336
---
Ihk
---
50
µA dc
leakage
---
Po
35
---
mW
Power oscillation (cw)
1236
Eb = 250 V dc (max);
Ib = 25 mA dc (max);
Rg = 10,000 ohms;
Rk = 0;
F = 3,370 ±100 MHz;
t = 30 sec (min)
Dwg 102-JAN
pF
1.40
1.20
Cgp
Direct-interelectrode
1331
No voltages
pF
2.45
2.00
Cin
capacitance
DESC Dwg 65025
---
pF
0.030
---
Cout
pF
200
50
Cksh
Emission
1231
(Eb=Ec)/Is = 40 mA dc
---
Etd
---
8
V dc
Amplification factor
1316
---
Mu
27
44
---
2
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