MIL-PRF-1/894G
TABLE I. Requirements or tests.
Limits
MIL-STD-1311
Requirement or test
Unit
Notes
Conditions
Symbol
Min
Max
Method
Conformance
inspection, part 1
3241
If
540
660
mA
Heater current
3201
Eb = 110 V dc;
Ec(1)
-9
-16
V dc
Critical grid voltage for
4/
Rp = 1,700 ohms;
conduction (1)
Rg = 0.1 MegΩ
3201
Ec(2)
-21
-31
V dc
Critical grid voltage for
Eb = 250 V dc;
conduction (2)
Rp = 5,600 ohms;
Rg = 0.1 MegΩ
epp = eggl = 180 ± 9.0 v;
1231
etd
---
69
v
Pulse emission
prr = 100 ± 5;
tk = 5 (min);
Ra = 10 ohms;
Rp = 20 ohms;
calibrating resistor = 10 ohms;
Zm = 7.5;
t = 3 (max)
Conformance
inspection, part 2
1031
No voltages applied
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Low frequency vibration
µA dc
1336
Ihk
0
20
Heater-cathode leakage
Conformance
inspection, part 3
---
Group B (see figure 1);
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Life test
t = 500 hours
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Life-test end points:
3201
Eb = 110 Vdc;
Ec(1)
-7.0
-18.0
V dc
Critical grid voltage
Rp = 1,700 ohms;
for conduction (1)
Rg = 0.1 MegΩ
3201
Ec(2)
-19.0
-33.0
V dc
Critical grid voltage
Eb = 250 Vdc;
for conduction (2)
Rp = 5,600 ohms;
Rg = 0.1 MegΩ
epp = eggl = 180 ± 9.0 v;
1231
etd
---
110
v
Pulse emission
prr = 100 ± 5;
tk = 5 (min);
Ra = 10 ohms;
Rp = 20 ohms;
calibrating resistor = 10 ohms;
Zm = 7.5;
t = 3 (max)
See footnotes at top of next page.
2
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