MIL-PRF-1/1162E
TABLE I. Testing and inspection - Continued.
Limits
Inspection
Method
Notes
Conditions
Symbol
Min
Max
Unit
MIL-STD-1311
Conformance inspection,
part 3
Life test
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Group C;
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Eb = 11,000 V dc
Ec2 = 770 V dc
Ib = 60 A dc;
t = 500 hours (min)
Life test end points:
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Line width A
5226
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Width
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0.38
mm
Line width C
5226
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Width
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0.55
mm
Ec1
Modulation
5223
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38
V dc
Heater-cathode leakage
5251
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current
Grid No. 1 leakage
5251
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current
Grid No. 2 leakage
5251
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current
Stray emission
5216
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(conventional types)
1/ When Ec2 is greater than 330 V dc or Ec1 is near zero, the effective resistance of the anode and grid No. 3 supply should be
adequate to limit the anode and grid No. 3 input power to 6 watts. The peak grid No. 1 drive from cutoff should never exceed
65 volts.
2/ Maximum-rated voltages are applied to all electrodes connected through the base, and with tube in cutoff conditions.
3/ Displacement of the spot corresponding to the image of the final aperture shall not exceed the limit specified.
4/ This test to be performed at the conclusion of the holding period.
5/ The neck and base straightness shall be determined by the insertion of the tube neck in a cylinder 5 inches (127.0 mm) long
and 1.500 +0.003, -0.000 inches (38.10 +0.08, -0.00 mm) inside diameter. The cylinder should move freely between the
reference line and the base of the assembled tube.
6/ The distance between the center of the unfocused, undeflected spot at low intensity (Ec1 near cutoff) and the center of the
image of the masking aperture observed at high intensity of the unfocused, undeflected spot shall not exceed the limit specified
herein. To prevent damage to the screen, Ec1 shall not be held at zero for more than approximately 10 seconds.
7/ The screen characteristics shall be measured with constant beam energy of 0.24 watts defocused to a spot approximately 0.25
cm in diameter. The test conditions shall be anode voltage (relative to cathode) 4,000 V minimum and beam current 60 A dc
maximum. The screen characteristics shall comply with the following minimum limits: cb5 = 400 cb; G5: 1 = 4.
4
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