[Collins] R-388

[Gerald]

On Mon, 2005-08-08 at 19:46 -0700, telegrapher at att.net wrote:
> This is kind of like the chicken or egg concept.  Which came first, the 
> 388 or the 51J-3.  Manuals available for the 388, but if the 51J-3 was 
> first, what happened to make the name change to the R-388?  Was it a mod 
> or just nomenclature change because of a different user.  And why are 
> there no manuals for the 51J-3?  Collins who evidently produced the 
> R-388, so my manual states anyway didn't seem to acknowledge the 51J-3 
> name or at least address it in their manual yet everyone says the R-388 
> is the same as the 51J-3.
> 
> Again the question, which designation came first and what caused the 
> secondary name.  When was the 51J-3 designation applied or was it off 
> the boards that way?  Was the 388 supposed to be more of a SWL/ham 
> receiver upgrade from the 75A series and the military just slapped the 
> 51J designation on it to make it "military" or is it the other way around?
> 
> Just like to know the history of some of my gear and have or see some 
> paper on it.
> 
> Thanks to all who reply in advance.  I know there are more questions and 
> maybe some of mine aren't worded to well but hopefully the message will 
> get across.
> 
> Larry
> W0OGH
> 
51J3 is Collins commercial type number. Just like 75S-3, 32V-3,
821A-1...

R-388 and R-390 are military nomenclature, sometimes applied to slightly
modified commercial equipment or to equipment developed to military
contract.
-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer