MIL-PRF-1/1325F
TABLE I. Testing and inspection.
Inspection
Method Notes
Conditions
Acceptance
Symbol
Limits
Unit
MIL-STD-
Level
20/
Min
Max
1311
Conformance inspection,
part 1
3/
1266
Total grid current
Eb = 200 V dc;
0.65
Ic
0
-0.3
µA dc
Ec = -2 V dc;
Rg = 0.5 MegΩ
Rk= 0
Electrode current (1)
1256
---
0.65
Ib
9
19
mA dc
Ck = 1,000 µF
(anode)
0.65
Ib
---
50
1256
---
Ec = -5 V dc;
Electrode current (2)
µA dc
Rk = 0
(anode)
Transconductance (1)
1306
---
0.65
Sm
12,500 19,500 µmhos
Ck = 1,000 µF
Output power (1)
4250
4/
Eb = 250 V dc
0.65
Po
1.7
---
W
Conformance inspection,
part 2
Heater current
1301
---
Ef = 6.3 V
---
If
205
245
mA
+30
---
Ihk
---
Heater-cathode leakage
1336
---
Ehk = +60 V dc
µA dc
-30
---
Ihk
---
Ehk = -60 V dc
µA dc
---
15
%
5/
Ef = 5.7 V
---
Transconductance (2)
1306
ĆSm
Ef
Cgp
pF
2.70
1.5
Cgk
1331
1/
Direct-interelectrode
pF
5.00
3.6
---
Cpk
capacitance
pF
0.040
---
Electrode current (3)
1256
---
Ec = -2.5 V dc;
---
Ib
100
---
µA dc
(anode)
Rk = 0
Amplification factor
1316
---
---
Mu
55
85
---
Ck = 1,000 µF
MegΩ
R
100
---
Insulation of electrodes
1211
---
E(g-all) = -100 V dc
---
E(p-all) = -300 V dc
4250
4/
Output power (2)
Ef = 5.7 V;
---
---
0.2
W
ĆPo
Eb = 250 V dc;
Ef
do not retune cavity
Conformance inspection,
part 3
mV ac
150
---
Ep
---
2/ 18/ Ebb = 125 V dc;
Sweep frequency vibration
1031
R1 = 10,000 ohms;
Rk = 50 ohms
2/ 18/ Ebb = 125 V dc;
Variable-frequency
1031
---
Ep
---
150
mV ac
vibration
R1 = 10,000 ohms;
Rk = 50 ohms
See footnotes at end of table.
2
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