Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
SO, SOa, SO-1, -2, -3, -4, -5, -6, -8, -8a, -9, -10, -13
Pulse Repetition Rate:
FUNCTIONAL DESCRIPTION
SO, SOa, SO-1, -2, -3, -4, -5, -8, -9, -13-
The SO radar equipments are lightweight, medium-
400 pps
power surface search radars for use on patrol, auxiliary
SO-6, -10 - 650 pps
and landing craft. Provision is made for IFF. All these
Pulse Width: SO, SOa, SO-1, -2, -3, -4, -8, -9,
equipments are similar in purpose. However, the SO,
-13 - 1.00 -sec
SOa, SO-1, -2, -3, -4, -8, -9, and 13 are used almost
SO-5, -6, -10 - 0.37 sec
exclusively for surface scanning. The SO-5, -6, and -10
are used for both surface and air scanning.
Range Accuracy: +60 yd on 4 mi range, +300 yd
on 20 mi range
RELATION TO SIMILAR EQUIPMENT
Azimuth Accuracy: 1 deg
None.
IF. Frequency: 30 mc
Receiver Gain: 120 db
TECHNICAL DESCRIPTION
Type of Presentation: 5-in. CRT, provision for
IFF
Operating Voltages and Power Requirements:
Range Marks: 1, 5, and 20 mi on PPI, movable
SO, SO-13 - 24 or 30 vdc, 1.51 kw
range markers
SOa - 24 vdc, 2.7 kw
Antenna Type: Parabolic
SO-1, -8, -8a - 115 vdc, 3.0 kw
Antenna Feed: Waveguide and nozzle
SO-2, -10 - 115 vac, 60 cps, 1-ph, 4.0 kw
Antenna Polarization: Horizontal
SO-3 - 24 vdc, 2.0 kw
SO-4 - 115 vdc, 1.64 kw
INSTALLATION CONSIDERATIONS
SO-5, -6 - 115 vdc, 4.25 kw
Siting: Transmitter-receiver unit is waterproof
SO-9 - 32 vdc, 1.8 kw
and may be installed without shelter. All
other units require shelter. Layouts vary
SO, SOa, SO-1, -2, -8, -8a, -9, -13 - 2900 to
with type of craft. Standard layouts are avail-
3100 mc
able at most Navy installation bases and at
SO-5, -6, -10 - 6275 to 6575 mc
BuShips.
SO-3, -4 - 9000 to 9160 mc
Mounting: Supports along with h o u s i n g s are
Range, Max: 20 mi approx
shown on the Navy Yard plans.
Range, Min: 400 yd
Cabling Requirements: Standard Navy armored
Peak Power Output:
cable is used for all i n t e r u n i t connections
SO, SOa, SO-9, -13 - 60 kw
except the pulse cable. Cables are run ac-
SO-1, -2, -8, -8a - 75 kw
cording to standard Navy wiring practices.
SO-3 - 20 kw
Extra cabling is left at terminal connections
SO-4 - 50 kw
to permit units to be removed without discon-
SO-5, -6, -10 - 91 to 285 kw
necting and to permit repair of cable ends.
Related Equipment:
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
SO
Antenna Assembly 66ADN
1
43
26-1/4
26-1/4
59
Radar Receiver Transmitter 43ABK
1
23-1/2
18-5/16
14-13/16
85
or 43ABY
1
24
19
16
93
Motor Alternator and Modulator
Assembly 21ACB
1
24
14-7/16
14-5/16
93
Rectifier Power Unit CRP-20178
1
20-1/2
10-7/8
9-7/8
30
Plan Position Indicator 55ACD
1
22-5/16
21-3/16
13-1/2
80
SO: 2
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