Radio Navigation Equipment - Signalspaning.se

Homing Adapter AN/ARA-8 is an adapter unit
for use with VHF receivers, such as those used in Radio
Sets SCR- 522 or AN/ARC-3, to provide the pilot with means
of homing on any transmitted carrier wave within the frequency
range of 120 to 140 mc. This adapter gives a dotdot-dash
or dash-dot-dot signal when the aircraft is off the
course to the left or right. While on course, a continuous
tone is heard. When off course, the pilot turns right ifa
dot-dot-dash signal is heard and left if lie hears the dashdot-dot
signal.
Principal application of AN/ARA-8 is in fighter
aircraft equipped with VHF command sets. This equipment
can be used for air-to-air homing for purposes of
rendezvous and the gathering in of scattered combat planes.
Homing can be accomplished on either CW, MCW or audio
pulse signals.
Chief limitingfactor inthe operation of AN/ARA-8
is that the distance range is limited to line of sight. Reliable
frequency range of this adapter is not the full range
of VHF communication equipmentbut is limited to a range
of approximately 20 mc. between 120 and 140 me. While
this 20 mc. range can be shifted up or down slightly in the
frequency band of the communication equipment, the cable
lengths furnished with the adapter required frequencies
between 120 and 140 mc. for proper operation.
Army Supply Program requirements as of 31
January 1945 were 3,500 for the calendar year of 1945.
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AN/ARA-8 Antenna
Airplane
POWER INPUT
FREQUENCY
TYPE OF SIGNAL
AN/ARA-8
Installation, AFT Fuselage of P-51
36 WATTS
z Izz120-140 MC.
CW OR MCW OR AUDIO
PULSE
Homing Adapter AN/ARA-8 is used with VHF receivers to rjov actraft with means of homing on any
transmitted carrier wave within the frequency range of 120 to 140 in .
Nay 1945
.