[R-390] R-1247 Stuff ( was: modified R390A, etc )

Tue, 03 Dec 2002 12:06:06 -0600

I have the boxen that goes with Todd's setup. Unfortunately it is packed
in the storage building. I could get dome pics sometime if anyone is
interested. The outboard gear consists of an oscillator for KC, one for
MC, and a two input SSB convertor. The only thing missing is the osc
signal from the matching TX, the freq which I don't remember.

One of the BA members an R-1247 to hook all this together, and I was
going to swap either my minty 54 Collins or 67 EAC. :-)
One of these days I may get a round tuit if his RX is still available.

If anyone has an R-1247 and wants the rest of the setup, drop me an
email. ( preferably at [email protected] )

73

Tom KA4RKT

At 01:55 PM 11/27/2002, you wrote:
>I have three of the R-1981's -- R-390A's with a TMC Mod Kit.  (I forgot the
>number --  there's an adhesive metal tag on the front panel.  These have a
>small metal box mounted to the rear panel containing a solid state PC
>circuit board (including one or more IC's as I recall) with several BNC
>connectors, plus two more BNC's added to the rear panel itself. There are
>also a number of tee-connectors tapping into the MB (mini-BMC) cables here
>and there inside the radio.
>
>They don't look much like Todd's receiver.  As I recall, someone wrote that
>this mod was to use a digital frequency counter with the '390A for added
>accuracy, but seems there are more added connectors than would be needed for
>that purpose.
>
>Barry
>
>
> > Todd,
> >
> > The R-390A with 3 BNC jacks sounds like an R-1981.   It is described at
> > r-390a.net under "variations".
> >
> > Drew
> >
> >> >NASA used R-390A' s modified to use high stability frequency
>oscillators.
> > >Maybe another group member can expand upon this. Jon AB9AH
>
> > >----- Original Message -----
> > >From: <[email protected]>
> > >To: <[email protected]>
> > >Sent: Tuesday, November 26, 2002 9:26 PM
> > >Subject: [R-390] R-390A Modified For Synthesizer Input?
> > >
> > >
> > > > <PRE>I have some pictures of an R-390A receiver modified with a
>special
> > >jack panel
> > > > on the rear panel with 3 BNC input jacks that appear to be inputs for
> > > > external synthesizer control of the receiver. I was wondering if
>anyone
> > >in
> > > > the list has seen an R-390A modified in this manner? I'm not sure if
> > >there
> > > > are any extra switches on the front panel to enable/disable the
>special
> > > > inputs on the back. Looks very unusual. To see the pictures type in
>(or
> > >copy
> > > > and paste) these addresses :
> > >members.aol.com/toddroberts2001/Item7.jpg
> > > >      or             members.aol.com/toddroberts2001/Item8.jpg
> > >Thanks
> > > > for any info on this. 73 Todd Roberts WD4NGG.
>
>
>
>_______________________________________________
>R-390 mailing list
>[email protected]
>http://mailman.qth.net/mailman/listinfo/r-390