[Milsurplus] Collins 18S-4A interesting observation

[Mike Morrow]

Interesting indeed, Jack.

Bendix RTA-1B to Collins 18S-4A

would be

AN/ARC-9 to AN/ARC-59.

Mike / KK5F

-----Original Message-----
>From: Jack Antonio <scr287 at att.net>
>Sent: Jun 28, 2016 11:23 PM
>
>Well, it may be interesting to some folks.
>
>I acquired one of these sets yesterday, quite
>dirty after who knows how many years of semi-
>outside storage(it was in a shed that had
>collapsed).
>
>After cleaning it up,I noticed that the connectors and their spacing
>were the same as the Bendix RTA-1B, so I compared manuals,
>and it turns out that the pin connections between the
>two are mostly the same. Control functions, audio, grounds
>and some of the primary power connections match up between
>the two sets.
>
>So I'm led to wonder if one of the design criteria for the
>Collins 18S4 radio was to be an almost plug and play replacement for
>the older Bendix RTA-1 set?
>
>The radio cleaned up OK, and getting it running looks promising.
>Biggest question now is how well off the dynamotor is.
>
>Jack Antonio WA7DIA/4