INCH-POUND
MIL-PRF-1/422J
2 July 2004
SUPERSEDIING
MIL-PRF-1/422H
12 October 1998
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBE, CATHODE RAY
TYPES 7YP1, 7YP2, AND 7YP7
This specification is approved for use by all Depart-
ments and Agencies of the Department of Defense.
The requirements for acquiring the electron tube described herein
shall consist of this document and the latest issue of MIL-PRF-1.
DESCRIPTION: Electrostatic deflection and focus, square face, five beam.
DIMENSIONS AND PIN CONNECTIONS: See figure 1.
ABSOLUTE RATINGS:
Parameter:
Ef
Ec1
Eb1
Eb2
Eb3
ed
Rg
Zd
Ehk
Eb3/Eb2
Unit:
V
V dc
V dc
V dc
V dc
v
Meg
Meg
V dc
Ratio
±180
Maximum:
6.9
-200
1,650
3,850
7,700
1,250
1.5
1.0
2.0
see note 1
see note 2
Minimum:
5.7
0
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Test conditions:
6.3
Adjust focus
2,000
4,000
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1.0
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2.0
see note 3
___________________________________________________________________________________________
GENERAL:
Qualification - Required.
Prior to shipment, 7YP2 tubes shall be electrically burned-in on a 100 percent basis. These tubes shall be operated at standard operating
conditions with 5 microamperes direct current applied to each gun for a period of 48 hours. During this 48 hour period, the tube shall be
turned off for 30 minutes (allowed to cool) and then turned on to continue burn-in at least 4 times. Following burn-in, each tube shall be
tested in accordance with the following MIL-STD-1311 tests:
Method
Test
Method
Test
5201
Voltage breakdown
5241
Grid-cutoff voltage
5206
Gas "cross"
5251
Grid No. 1 leakage current
5223
Modulation
5251
Anode No. 2 leakage current
5231
Spot displacement (leakage)
5201
Electrode current (Anode No. 1)
Those tubes which fail any of these tests shall not be shipped.
Visual inspections shall be made to ensure that all JAN 7YP2 CRT's are failure free from arcing for continuous and intermittent
operational testing during all manufacturing and acceptance testing.
Pressure test method 1141 shall be performed, except 30 pounds per square inch (PSI) absolute pressure shall be applied in lieu of 45
PSI absolute, on a 100 percent basis prior to shipment for the JAN 7YP2 tube only. Only those tubes meeting the acceptance criteria for
this test shall be shipped.
W hen a P2 CRT screen is specified, the phosphors shall be in compliance with Electronic Industries Alliance TEPAC Publication, TEP
116-B, `Optical Characteristics of Cathode Ray Tubes.'
AMSC N/A
FSC 5960
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