[Collins] R-388

[Gerald]

On Thu, 2005-08-11 at 12:28 -0400, David Thompson wrote:
> I thought the 51J series followed closely the 75A series (Gen Coverage VS
> Ham bands).  Having a R-388 made in 1962 sure blows up that theory as by
> then the 75A4 was replaced by the 75S series.
> 
> One further musing...Why is it we see plenty of R-388's and almost no
> 51J3's.  For that matter I have only seen one 51J2 and only a couple of
> 51J4's.  Its been awhile since I saw even an ad for a 51J3 but I see R-388's
> almost every week.
> 
> Dave K4JRB
The 51J probably did follow the 75A but lasted longer because they were
a commercial alternative to the R390(a) not replaced at Collins until
the 51S-1 came along. I don't know but I suspect there was a receiver
design made each year of 51J production to replace it that never got
past the proposal stage. I know that was true of ham gear.

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer