Volume 1
MIL-HDBK-162A
Section 2
15 December 1965
ITEM NAME: RADAR SET
TYPE: AN/APS-20A, AN/APS-20C
120/208v, 400/800. cps, 3-ph, 3/150 va
Antenna Data
RELATION TO SIMILAR EQUIPMENT
Type: Parabolic reflector
Beam Width
The AN/APS-20A, AN/APS-20C are essentially
Vertical: 8 deg
identical, electrically and physically, differing mainly in
Horizontal: 3.5 deg
that the AN/APS-20C has been changed to
Polarization: Horizontal
accommodate a newer flux-gate compass system.
Scanning Rates: 6 or 10 rpm
Beam Tilt Angle: -2 deg
TECHNICAL DESCRIPTION
INSTALLATION CONSIDERATIONS
Frequency: 2880 mc
Power Output: 1 megw
Related Equipment
Pulse Data
Required but not Supplied: (1) Radar
Width: 2 usec
Set AN/APX-13A, (1) Aircraft Radio
Repetition Rate: 300 pps
Equipment AN/ARW-35, (1) Aircraft
Receiver Sensitivity: 132 db below 1w
Radio Transmitter AN/ART-26 or AN/ART-
IF. Data
28, (1) Alternator, (1) Voltage Regu-
Frequency: 30 mc
Bandwidth: 1.5 mc
and Generator Drive, (1) Gyrostabi-
Range: 200 mi max
lized Flux-Gate Compass System, (1)
Power Requirements: 28v dc, 1008w and
Inverter, (1) Distribution Box.
115v, 380 to 420 cps, 1-ph, 250 va and
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENTS
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
AN/APS-20A
Air Cleaner M(-973/U
1
1-7/8 x 1-7/8 x 5-1/4
0.5
Air Pump HD-27/U or
1
5-3/8 x 5-5/8 x 8-1/2
8.0
HD-58/APS-20A
6 x 6-15/16 x 15-7/8
10.0
Antenna Assy AS-298/APS-20A
1
43-3/8 x 57-5/8 x 94-13/16
210.0
Antenna Control C-219A/APS-20 or
1
3-7/8 x 11 x 16-7/16
8.0
C-219B/APS-20
Antenna Control C-804/APS-20A
1
4-1/4 x 6-3/4 x 7-3/8
7.0
Blower HD-6/APS-20 or
1
6-7/8 x 9-11/16 x 16-1/4
6.0
HD-7/APS-20
3-11/16 x 4-3/4 x 5
2.5
Control Indicator C-294/APS-20A
1
15-1/2 x 24-1/2 x 26
92.0
Control Meter Box C-295/APS-20A
1
7-1/16 x 7-3/8 x 10
7.0
Deck Blower HD-5/APS-20
1
7 x 8 x 8-1/4
3.0
Dehydrator HD-14/U or
1
3-1/4 x 6-3/16 x 6-1/2
10.0
HD-59/APS-20A
4-7/8 x 5-9/16 x 8-3/8
6.0
Duplexer CU-82/APS-20
1
12-3/4 x 15-3/8 x 18-3/8
22.5
Junction Box J-117/APS-20
1
2-11/16 x 3-3/8 x 5-5/8
0.5
Junction Box J-168/APS-20A
1
2-3/16 x 3-1/8 x 4-5/8
2.0
Modulator MD-53A/APS-20 or
1
22 x 26-1/2 x 67-1/2
375.0
MD-53B/APS-20
AN/APS-20A: 2
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