MIL-PRF-1/1635C
TABLE I. Testing and inspection - Continued.
Limits
Notes
Conditions
Symbol
Min
Max
Unit
Inspection
Method
MIL-STD-
1311
Conformance inspection
part 3
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6/ 10/
Group C;
Life test
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beam current = 2.5 A dc;
Eb2 = 10,000 V dc;
t = 500 hours (min)
Life-test end points:
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Ec1
V dc
20
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5223
Modulation
mm
0.30
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5226
Line width A
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mm
0.42
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5226
Line width B
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5251
Grid No. 1 leakage current
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5251
Anode No. 1 leakage current
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5251
Anode No. 2 leakage current
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5216
Stray light emission
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(conventional types)
1/ It is recommended that the deflection electrode circuit resistances be approximately equal.
2/ The P19 screen may be permanently damaged if the current density is permitted to rise too high. To prevent burning, minimum
beam current densities should be employed.
3/ Marking shall be in accordance with MIL-PRF-1. If any specification requirements waiver has been granted, the product-
identification marking shall consist of the tube type-number only. (See figure 1 herein.)
4/ The following additional marking requirement shall apply: A line, of adequately contrasting color to the base-material color,
shall be drawn on the tube base parallel to the tube axis; this line shall be aligned with and on the same side as the index pin.
5/ Although all tests covered herein are required to be performed during preproduction sample approval inspection, the seven
tests listed under this caption are performed, normally, during preproduction sample approval only.
6/ Beam current shall be measured by applying a sufficient voltage to either D1 or D2 to deflect a 1 by 1-inch (25.4 by 25.4 mm)
raster until the raster cannot be seen on the screen. Grid No. 1 bias voltage shall be adjusted so that either D1 or D2 will
collect 2.5 microamperes.
7/ With the focused spot just above visual cutoff, examine the spot for any abnormalities. The spot shall be of uniform brightness
and shall not show any indication of a dual spot. This may be noted as an astigmatic spot of nonuniform brightness, or a spot
the extremities of which give the appearance of bright cores, with the center of the spot appearing dark.
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