The UHF Radio Direction Finder AN/ARA-25A uses signals received by any UHF radio set within the range of 225.0 to  399.9 MHz to indicate the bearing of radio signal sources. When a signal is being received, a 100 Hz tone is heard regardless of whether the incoming signal is amplitude modulated or unmodulated.

The equipment is controlled from a UHF radio set  There are up to 18 preset channels available for different ADF beacons. Included is an M or Manual position. In the manual position any frequency can be dialed in with the knobs at the top of the unit.

 

The AN/ARA-25 receiver was installed on the deck behind the pilot's seat.

AN/ARA-25 amplifier/indicator only.

Both photos by Jerry Proc

 
 

AN/ARA-25 system components. (From Historic Naval Ships Association).

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Feb 25/10