MIL-PRF-1/664F
Table I. Testing and Inspection.
Inspection
Method
Notes
Conditions
Acceptance
Symbol
Limits
Limits
Units
MIL-STD-
Levels
Min
Max
1311
(see note 5)
Conformance
inspection, part 1
A ac
34
28
If
0.65
-
3241
Heater current
V dc
-6.2
-1.8
Ecc
0.65
Ebb = 750 V dc;
-
3201
Critical grid voltage for
Rg = 10,000 ohms (max);
conduction
Rp = 750 to 5,000 ohms
Ecc = +3 V dc;
V dc
75
---
Ebb
0.65
Rg = 10,000 ohms (max);
-
3201
Critical anode voltage
Rp = 750 to
for conduction
5,000 ohms
Ib = 16 A dc
V dc
14
---
Etd
0.65
ib = 160 a;
2
3204
Voltage drop
grid connected to anode
v
60
---
etd
0.65
thru 10,000 ohms
-
1231
Peak emission by
voltage drop
Conformance
inspection, part 2
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Test condition J;
4
1042
Shock, specified pulse
no voltages
V dc
-6.2
-1.8
Ecc
---
Ib = 16 A dc;
-
3206
Operation
Rg = 10,000 ohms
Rg = 1 MegΩ (min) and
10
---
Ic
---
3
3216
Grid current
µA dc
10,000 ohms
Conformance
inspection, part 3
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---
---
---
Group D;
-
---
Life test
Epp = 220 V ac;
Ib = 16 A dc;
ib = 160 a;
t = 500 hours
---
Life-test end points:
v
74
---
etd
---
-
1231
Peak emission by
voltage drop
10
---
Ic
---
-
3216
Grid current
µA dc
-6.2
-1.8
Ecc
---
-
3201
Critical grid voltage
V dc
for conduction
NOTES:
1. Filament lead marked "F-" shall be phased negative when anode is positive.
2. This test is to be the first test performed at the conclusion of the holding period.
3. Operate tube at least 5 minutes prior to test. Operation may be at optional Epp but Ib must be 16 A dc
minimum. To test, switch to test voltage Epp = 710 V ac and Ib = 16 A dc minimum in less than 2 seconds.
4. At the conclusion of this test, the TUT shall satisfy the requirements of MIL-STD-1311 method 1231 and method 3206 in
conformance inspection, part 1 and part 2, respectively.
5. This specification sheet uses accept on zero defect sampling in accordance with MIL-PRF-1, table III.
2
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