MIL-PRF-1/1178E
TABLE I. Testing and inspection - Continued.
Limits
Inspection
Method
Notes
Conditions
Symbol
Min
Max
Unit
Conformance inspection,
part 3
t
500
---
hours
Life test (1)
---
3/
Group C; beam current
= 2.0 µA dc; Eb2 = 10,000
V dc
Life test (1) end points:
---
Beam current = 2.0 µA dc
ĆEc1
---
Modulation
5223
22
3/
V dc
Beam current = 2.0 µA dc
---
3/
Line width "A"
5226
0.26
mm
Width
Beam current = 2.0 µA dc
3/
---
Line width "B"
5226
0.38
mm
Width
t
1,000
---
hours
Life test (2)
---
3/
Group C; beam current
= 2.0 µA dc; Eb2 = 10,000
V dc
Life-test (2) end points:
---
Beam current = 2.0 µA dc
ĆEc1
---
Modulation
44
5223
V dc
3/
Beam current = 2.0 µA dc
---
3/
Line width "A"
0.52
mm
5226
Width
Beam current = 2.0 µA dc
3/
---
Line width "B"
0.76
mm
5226
Width
1/ It is recommended that the deflection electrode circuit resistance be approximately equal.
2/ The P19 screen can be permanently damaged if the current density is permitted to rise too high. To prevent burning, minimum
beam current densities shall be employed.
3/ Beam current is 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 is adjusted so that either D1 or D2 will collect 2 microamperes.
4/ No dead spot of diameter greater than 1 millimeter shall be permitted within the quality area, and in any 2-inch (50.8 mm) circle
within the quality area not more than one of a diameter greater than 0.7 millimeter, and not more than four of a diameter greater than
0.3 millimeter.
5/ The ratio of the line width of a 6-inch (152.4 mm) long trace, adjusted for best center focus, to the line width measured on the
faceplate axis when the trace is deflected perpendicularly ± 3 inches (± 76.2 mm) from the face center by a balanced dc voltage,
shall be not greater than the value specified herein.
6/ With the tube enclosed in a lightproof container, with the potential specified herein applied, and with no deflecting fields applied, the
tubes shall be biased to cutoff. Under these conditions, the entire face of the tube shall be examined for stray emission by an
observer who has accommodated his eyes to viewing the face of the cathode-ray tube for at least 2 minutes through an aperture in
the lightproof container. If stray emission occurs, scanning fields such as would be required to produce a 1 by 1 inch (25.4 by 25.4
mm) raster shall be applied, under which condition, the stray emission shall disappear completely.
7/ Test shall be performed at the conclusion of the holding period.
8/ Inspection shall be 100 percent.
4