MIL-HDBK-162A
Volume 1
15 December 1965
Section 1
ITEM NAME: RADIO EQUIPMENT
TYPE: YJ
B Transponder: 4000 pps
and since tile location of the YJ equipment is known, its
Recovery Time (At 400 pps)
direction and range can be computed from information
A Transponder: 50 to 120 usec.
appearing on the radar indicator on the Interrogating
B Transponder: 100 to 200 usec
craft. The interrogating craft can thus determine its own
Pulse Duration: Approx 2 usec or more.
position.
In addition, planes can use the signals
Reply Data
transmitted by YJ equipments for "hamming" purposes.
Pulse Duration: 7 to 10 usec
Pulse Power (At 100 pps)
RELATION TO SIMILAR EQUIPMENT
A Transponder: 15w min
B Transponder: 75w min
Similar to Navy Model YF-1 with minor exceptions.
Time Sharing Rate: 15 ot 20 cps
Coding Cycle Duration: 30 sec
Power Requirements: 115v plus or minus 5%
TECHNICAL DESCRIPTION
or 230v plus or minus 5%, 50 to 60 cps,
approx 350w.
Frequency Data
Antenna Data
A Transponder
Type: Half-loops.
Receiver: 176.0 plus or minus 0.5 mc
Polarization: Horizontal.
Transmitter: 177.5 plus or minus 0.5 mc.
Impedance: 50 ohms.
B Transponder
Receiver: 515 mc
INSTALLATION CONSIDERATIONS
Transmitter: 520 mc
Interrogation Data
Not available.
Pulse Rate (Normal): (100 pps.
Pulse Rate (Maximum)
A Transponder: 3000 pps
PRINCIPAL COMPONENTS AND PHYSICAL DATA
SHIPPING DATA
COMPONENT
BOXES
OVERALL DIMENSIONS
UNIT WT.
(NR.)
(Inches)
(Pounds)
Radio Equipment Model YJ consisting of:
1
21-1/2 x 23 x 10-1/4
270
Rectifier Power Unit NT-20AC11
1
RF Unit, A Band NT-43ABW
1
RF Unit, B Band NT-43ABX
1
Housing Cover Assy
1
Antenna Assy NT-66AEY
I
18 x 25 x B4
333
Set of Equipment Spares
I
14 x 18 x 2-1
7(l
EQUIPMENT SUPPLIED DATA
COMPONENTS
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
Radio Equipment Model YJ consisting of:
1
Rectifier Power Unit NT-20ACH
1
10-11/16 x 12-1/2 x 16
57
RF Unit, A Band NT-43ABW
1
7-3/16 x 11 x 12-5/8
13.5
RF Unit, B Band NT-43ABX
1
7-11/16 x 11 x 12-5/8
17.5
Housing Cover Assy
1
19 x 20-1/2 x 35-1/2
Antenna Assy NT-66AEY
I
15 x 18-3/4 x 67-3/4
230
YJ: 2
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