Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
ITEM NAME: RADIO EQUIPMENT
TYPE: YJ-2
The Model YJ-2 is supplied with a frequency
Maximum Pulse Rate (To Which Equipment
conversion kit to permit nominal operating frequencies of
Will Respond)
176, 515, 535, and 555 megacycles.
A Transpondor: 3000 pps.
B Transpondor: 4000 pps.
RELATION TO SIMILAR EQUIPMENT
Recovery Time (at 400 pps)
A Transpondor: 50 to 120 usec
The Model YJ-2 is similar to Models YJ and YJ-1,
B Transpondor: 100 to 200 usec
differing in that the Model YJ-2 is the shipboard version
Interrogating Pulse Duration: Approx 2
of the Models YJ and YJ-i which are designed for shore
usec or more.
installation.
Reply Data
Transmitted Pulse Duration: 7 to 10 usec
TECHNICAL DESCRIPTION
Pulse Power (at 400 pps)
A Transpondor: 15w min
Frequency Data
B Transpondor: 75w min
Band Designation: 176 and 515 mc
Rate of Time Sharing: 15 to 20 cps
Range (Receiver)
Duration of Coding Cycle: 30 sec
A Transpondor: 171 to 181 mc
Power Requirements: 115v plus or minus 5%
B Transpondor: 505 to 535 mc
or 230v plus or minus 5%, 50 to 60 cps,
Range (Transmitter)
350w
A Transpondor: 172.5 to 182.5 mc
Antenna Data
B Transpondor: 505 to 535 mc
Type: Vertically polarized radiator and
Interrogation Data
horizontally polarized folded dipole.
Normal Pulse Rate: 400 pps
INSTALLATION CONSIDERATIONS
Not available.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
BOXES
OVERALL DIMENSIONS
UNIT WT.
(NR.)
(Inches)
(Pounds)
Radio Equipment Navy Model YJ-2
1
26-3/4 x 31-1/8 x 36-1/2
EQUIPMENT SUPPLIED DATA
COMPONENTS
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
Cabinet
1
17-1/8 x 22-5/8 x 29-3/4
1.25
Rectifier Power Unit NT-20ACH-2
1
10-11/16 x 12-1/2 x 16
57
RF Unit, A Band NT-43ABW-2
1
7-3/16 x 11 x 12-5/8
13.5
RF Unit, B Band NT-43ABX-2
1
7-11/16 x 11 x 12-5/8
17.5
Antenna NT-66AJL
1
20 x 21-1/2 x 42
17.5
REFERENCE DATA AND LITERATURE
Technical Manuals:
SHIPS 299
YJ-2: 2
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