[ARC5] Looking for an R23 RF coil (triple coil) block

[Mike Morrow]

>> Hello all - Im working on restoring an R23 receiver and am looking for
>> the RF coil assembly - I understand this has additional inputs for the
>> loop antenna. 
>
> No. That is not true. The loop connections are made externally to that 
> coil-box. The coil-box for the BC-453 will work just as well in that
> receiver.
>
>> Question - I have a RF block from a BC series receiver - outside of the
>> loop antenna, would this work or is there some modifications involved
>> to use (assume regular antenna terminal only)
>
> No modifications necessary. Just plug it in and go.

The ANT/RF/LO coil assemblies used in the 0.19 to 0.55 MHz receivers are:

System  Receiver          A.R.C. Part   Loop Winding
RAV  CBY-46102               6184          YES
ARA  CBY-/CCT-46129          6184 *        NO
SCR-274-N  BC-453-A,B        6184 *        NO
R-23, R-23A, R-148/ARC-5     9630          YES
 * Has same part number as used in RAV CBY-46102,
   but the ANT coil has NO loop winding.

The ARA and SCR-274-N navigation receivers have no loop connections.  Their ANT coils lack the loop winding that is present in RAV and AN/ARC-5 navigation receivers.  The loop winding connects between ANT coil pins 1 and 6 in the latter receivers.

Thus, the proper part 9630 must be used in the R-23, R-23A, or R-148 if a loop is to be connected.  For loopless operation, the later version of part 6184 will work.  It's not very likely you will come across an early part 6184 for the RAV.

Mike / KK5F