[R-390] Interesting receiver

[John Kolb]

The Navy destroyer I was on was completely rebuilt and received R-1051/URR's
in 1965.

John
KK6IL

At 11:09 AM 10/23/2006, Francesco Ledda wrote:

>I think that it is an amazing reciever, considered that was designed in the
>early sixties.
>
>
>
>-----Original Message-----
>From: r-390-bounces at mailman.qth.net
>[mailto:r-390-bounces at mailman.qth.net]On Behalf Of Cecil Acuff
>Sent: Monday, October 23, 2006 1:02 PM
>To: Transmaster; R-390
>Subject: Re: [R-390] Interesting receiver
>
>
>Originally built by General Dynamics.  Came in the R-1051 with no
>designation, the B, C, D, E, F, G and H designations.  Some G and H models
>I'm told are still in service in subs.  A very complicated receiver of
>modular design but will stay dead on frequency once warmed up for
>weeks..months etc....thanks to a 5 MC TCXO module.   Poor filter selections
>but has a great feature for beating selective fading by using the double
>sidband mode and it's two IF and audio chains zero beat on a SWBC station.
>Really cool!
>
>Not particularly sensitive and with low audio output.  Tuning method not
>popular which I think has hurt it desirability.  When working properly a
>pretty good receiver for SSB and SWBC.  Poor for CW.  When broke a real dog
>to work on.
>
>Will be a classic because of it's unique electro-mechanical design.
>
>I'm surprised to see any listed with Fair Radio as I bought all the
>remaining complete radio's they had probably 5 years ago.  Maybe they got
>some more.  Last time I checked the military was crushing all of them coming
>out of service and selling for scrap.
>
>I gave away the last 6 or 7 I had to get them out of the shop...tired of
>tripping over them.  They were complete but non-functional...
>
>Cecil Acuff
>
>
>----- Original Message -----
>From: "Transmaster" <22hornet at gmail.com>
>To: "R-390" <R-390 at mailman.qth.net>
>Sent: Monday, October 23, 2006 12:05 PM
>Subject: [R-390] Interesting receiver
>
>
> >I was looking through Fair Radio Sales website and I spotted this receiver
> > R-1051B does anyone know who built this unit and when they where in use.
> > Receivers have always fascinated me to see what engineers come up with
> > to do the  essentially the same job over the years.
> >
> > Ken
> >



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