Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
VJ, VJ-a, VJ-b, VJ-1
TECHNICAL DESCRIPTION
INSTALLATION CONSIDERATIONS
Ranges:
Siting: Selector switch, trigger delay unit and driver unit
VJ, VJ-a, VJ-1 - 2, 4, 10, 20, 80,and 200 mi
should be mounted close together.
VJ-b - 2, 4, 10, 25, 60, 100, 160, and 240 mi
Unit locations should be planned for short cabling.
Range Marks: At intervals of 1/4 of full scale
Indicator unit is weatherproof. All other units must be
Range Accuracy: +1%
located in protected areas.
Bearing Indication: True or relative
Mounting: Indicator unit is designed for four point deck
Video Input: +1 to +2.5v
mounting, but two-point top rear mounts are also
Trigger Input: +5 to +50v, 57 to 300/820/1,000 cps
provided for tilted installations.
Delay: 20 and 40 mi
Cabling Requirements: One RG-27/U cable is supplied.
Operating Voltages and Power Requirements:
Standard Navy armored cable is used for all interunit
VJ, VJ-b, VJ-1 - 115v, 60 cps, 1-ph
connections. Bending radius of coaxial cables should
VJ-a - 120v, 400 cps, 1-ph, 70w approx
be at least ten times the cable diameter.
Related Equipment:
All search radars capable of
transmitting PPI information.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
VJ
Driver Unit NT-SOAFU-1
1
37
19-1/2
14-5/8
281
Indicator Unit NT-55AGU
1
32-3/8
21-3/8
20
258
Selector Switch NT-24786
1
17
12-1/2
19
64
Line Voltage Regulator
1
13-3/4
9-3/4
8-1/2
59
NT-302115
VJ-a
Driver Unit NT-50AFU
1
37
19-1/2
14-5/8
281
or NT-50AFU-!
Indicator Unit NT-55AGU
1
32-3/8
21-3/8
20
258
Selector Switch NT-24786
1
17
12-1/2
19
64
VJ-b
Driver Unit NT-50ALB
1
37
19-1/2
14- 5/8
281
Indicator Unit NT-55AKP
2
32-3/8
21-3/8
20
258
Selector Switch NT-24786
1
17
12-1/2
19
64
Line Voltage Regulator
1
13-3/4
9-3/4
8-1/2
59
NT-302115
VJ: 2
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