MIL-PRF-1/36J
NOTES - Continued:
5/
As measured by a 2 x 2 inch (50.80 x 50.80 mm ) raster using a type 3 photronic cell without eye correction,
calibrated in foot candles of illumination from a light source having color temperature of 2,700°K.
The reflecting plates shall be returned to anode No. 2 through a 2.5 MegΩ resistance. Ib3, the beam current,
6/
shall be set as follows:
P1 Ib3 = 100 µA dc
P11 Ib3 = 100 µA dc
P2 Ib3 = 100 µA dc
P12 Ib3 = 5 µA dc
P7 Ib3 = 200 µA dc
a/
The high frequency scanning shall be applied to the deflecting plates nearest the screen and the
amplitude shall be adjusted to give a line length of approximately 90 percent of the maximum tube
diameter. The low-frequency scanning amplitude shall be expanded to approximately 90 percent of the
maximum tube diameter in the direction perpendicular to the direction of high-frequency scanning.
Readjustment may be made for best overall focus. The tube shall be observed for deflection defocusing,
astigmatism, or spot ellipticity observable to the eye as evidenced by fuzziness due to lack of sharpness
of the trace (usually around the edges), bow-tying (irregular widths of any single line when observed at
different points), bowing of trace other than that normally caused by curvature of bulb.
b/
This test for focus is to be made in addition to the line width measurements.
7/
This test to be performed at the conclusion of the holding period.
8/
The same conditions shall be set up as described in note 6 except that the connection of deflection elements
to the low- and high-frequency scanning supplies shall be interchanged and the amplitudes adjusted to 90
percent of the maximum tube diameter in both directions without any adjustment of focus from note 6
conditions.
An examination for defocusing, astigmatism, or spot ellipticity shall be made as in note 6.
9/
This test shall be performed during the initial production and once each succeeding 12-calendar months in
which there is production. A sampling plan shall be used, with a sample of six tubes with an acceptance
number of zero defects. The regular "12-calender month" sampling plan shall be reinstated after three
consecutive samples have been accepted.
6
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