[Milsurplus] USN RBM vs. RBS Questions

[Hue Miller]

----- Original Message ----- 
From: <WA5CAB@cs.com>

> Incidentally, a modified version of the RBS supposedly became R-303/FRR but I 
> don't have any actual info on it.

What could have changed on it but the antenna connector?
There isn't much room for anything else.
Maybe this was just a nomenclature change?

Like that Korean War BC-312, wasn't it renomenclatured
the R-339 or something such? Was that new production
or just overhaul and re-nameplate?
Hue