MIL-PRF-1/1635C
TABLE I. Testing and inspection - Continued.
8/ If used, visually check the internal aluminum coating in the area between the edge of the faceplate and internal aquadag; it
shall appear uniform and nearly opaque. If not, perform the following test: With a 1.5 by 1.5-inch (38.1 by 38.1 mm) slightly
defocused raster, in accordance with method 5221, in the center of the screen, and with Eb2 = 10,000 volts, and with a beam
current of 15 microamperes, there shall be no evidence of any doubling of the raster lines (venetian-blind effect), or a sawtooth
effect at the edges of the raster. (Any doubling of the raster lines shall be intermittent only, giving the appearance of being
pulsed.) Repeat on the edges of the screen in the following positions:
a. 45 clockwise from the plane of pin No. 1.
b. 135 clockwise from the plane of pin No. 1.
c. 225 clockwise from the plane of pin No. 1.
d. 315 clockwise from the plane of pin No. 1.
These tests shall be made quickly to prevent burning of the screen; apply the grid drive momentarily.
9/
The ratio of the line width of a 2-inch (50.8 mm) long trace, adjusted for best center focus, to the line width measured on the
faceplate axis when the trace is deflected perpendicularly plus or minus 4 inches (101.6 mm) from the face center by a
balanced dc voltage, shall not be greater than the value specified herein.
10/ Unless otherwise specified, tubes subjected to the following destructive tests are not to be delivered on the contract: Shock;
life test.
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