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 Volume 1
MIL-HDBK-162A
Section 2
15 December 1965
ITEM NAME: RADAR IDENTIFICATION SET
TYPE: AN/APX-6
Duty Cycle: .0052
RELATION TO SIMILAR EQUIPMENT
Sensitivity: 100 uv; selectivity at 6 db
below max response, 9.5 mc to 14.5 mc;
The AN/APX-6 is similar to AN/APX-25, and is replaced
responds to pulsed interrogations be-
by AN/APX-6A.
tween 74 and 83 db below iv
Interrogation Signal Paired Pulse Spacing
TECHNICAL DESCRIPTION
Mode 1: 3 usec
Mode 2: 5 usec
Frequency: 950 to 1150 mc
Mode 3: 8 usec
Range, Max: 150 naut mi
Input Impedance: 51 ohms
INSTALLATION CONSIDERATIONS
Antenna: One-half wavelength vertical
diamond-shaped radiator, end feed
Related Equipment: The AN/APX-6 can be
Power Output: 1 kw, peak; 24 and 30 db
used for "Black Maria" operation when
above lw rf power to 51 ohm resistive
responds to pulsed interrogations be-
termination at the antenna
used in conjunction with Radar Receiver
Operating Voltages and Power Requirements
R-269/APX-6. When used in this manner
ac: 105 to 124v, 320 to 1760 cps,
the AN/APX-6 will reply to special in-
220w
terrogations routed through the R-269/
dc: 24 to 29v, 40w
APX-6, giving azimuth to the IFF reply.
Intermediate Frequency: 59.5 mc plus or
Also used with the AN/APX-28.
minus 1.5 mc
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Receiver-Transmitter
1
9-7/8
13-3/16
14-1/8
38.4
RT-82/APX-6 or
RT-279/APX
Control Radar Set
1
3-3/8
6
4-9/16
3.3
C-544/APX-6 or
C-1158/APX
*Antenna Assembly
1
9-7/16
3-3/16
7-1/4
1.1
AS-133/APX or
AT-234/APX
Mounting MT-362/A
1
12.25
9.75
2.31
3.5
or MT-362A/A
NOTE: *Type used dependent upon aircraft installation.
REFERENCE DATA AND LITERATURE
Technical Manuals:
Technical Orders:
AN16-30.2APX6-3
12P4-2APX6-1
12P4-2A PX6-5O6B
12P4-2APX6-2
12P4-2APX6-506C
Specifications:
12P4-2APX6-3
12P4-2APX6-506D
MIL-R-6335B
12P4-2APX6-506
AN/APX-6: 2
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