[Milsurplus] Collins 18S-4 Squadrons

[Mike Morrow]

>I have a Collins 180K-3 antenna matching network indicating  that the 18S-4 
>was used by SAC on B-47 or possibly on mission support  aircraft stationed 
>at MacDill AFB, Florida.
>
>Does anyone have any documentation on military units that utilized the 18S-4 
>prior to the change over to AM with suppressed carrier(SSB).

I don't have any usage information.  But eventually, the 18S-4 was given the
proper JAN nomenclature of RT-380/AR, part of AN/ARC-59.

Fair Radio years ago sold the RT-380/AR units.

Mike / KK5F