[R-390] R-390A (was Hi)

Sat, 7 Jun 2003 08:51:01 -0400

Go to  http://www.r-390a.net/faq-refs.htm

Read the "Cost Reduction Program for Radio Receivers, R390/391( )/URR Final
Progress Report, Collins Radio Company"

This report may shed some light on the evolution from the R-390 to the R-390
(A model).   It also mentions a "B model".

----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Friday, June 06, 2003 11:00 PM
Subject: Re: [R-390] Hi

> Been enjoying reading all the postings about "A" vs "non-A" nomenclature.
> Thought I would add that as I understand it the military used the "A"
suffix to
> denote the radio has mechanical filters in the IF, if the original version
did
> not contain them? For example the Collins R-388 became the R-388A  (same
as
> the 51J-4). The SRR-11 became the SRR-11A  along with the rest of the
> SRR-11,12,13 series. That is helpful to know if you see a radio up for
sale - I would
> rather have an SRR-11A for the tighter mechanical filter selectivity. This
has
> probably been gone over before.  73 Todd Roberts WD4NGG.
>
>
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