[R-390] Old guy needs help identifying some things....

[Steve Toth]

I have an R-1247 I picked up from an SWL'er in Rhode island.
Attached (below) is background info that I gathered over time from previous discussions on modified R-390A's here on the R390 forum.  It is in a Word doc.  I'm no expert on this and other guys here on the board have direct experience with the modified receivers.  In any case, I hope this helps clarify what receiver you are looking at.
Best,

- Steve  W7SJT

"Always look for a positive solution then Improvise, Adapt, and Overcome"

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"Every day is an opportunity to challenge the achievement of your dreams"




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    On Friday, July 24, 2020, 08:39:47 PM MDT, jvendely at cfl.rr.com <jvendely at cfl.rr.com> wrote:  
 
 Yes, the R-1247 was part of the AN/GRC-129, which was a 1 kW SSB
upgrade done by Manson Laboratories to the Air Force's AN/GRC-26D RATT
vans The R-1247/GRC-129 was never used in by NASA in Project Apollo,
despite the widespread folklore. The big Apollo HF systems were
supplied by TMC.

73,

John K9WT

    -----------------------------------------From: "Glenn Little WB4UIV" 
To: r-390 at mailman.qth.net
Cc: 
Sent: Friday July 24 2020 7:45:25PM
Subject: Re: [R-390] Old guy needs help identifying some things....

IIRC the synthesizer was built by Manson Labs.
 Also I think this version of the R390A was used in the Apollo
program.
 The receiver is probably a R-1247/GRC-129.
 The synthesizer is probably a O-1203/GRC-129.

 73
 Glenn
 WB4UIV

 On 7/24/2020 7:27 PM, Phil wrote:
 > Hello,
 >
 > I have been discussing with a friend some things we
 > are hopefully going to purchase from someone who
 > is downsizing.
 >
 > In the course of this discussion, we mentioned the
 > R-725 which if I remember correctly is an R-390A
 > that has been retrofitted with an R-390 IF deck
 > We also talked about a version of the R-390A that
 > had small adapters plugged into the oscillator tube
 > sockets so external oscillator signals could be fed
 > in through bnc connectors on the rear panel. Could
 > someone please tell me what the designation of this
 > receiver is?
 >
 > Also, in regard to that receiver, my friend claims
 > he traded me a synthesizer designed to be used with
 > it. I have no recollection of this trade but know
 > that my friends memory is better than mine. Does anyone
 > know the designation of this synthesizer...I might be
 > able to find a picture on the internet that would jog
 > my memory.
 >
 > Thanks for any and all help from and old guy...I can
 > still move an R-390A around as long as don't have to
 > pick it up off the floor :-)
 >
 > Phil W5BVB
 > ______________________________________________________________
 > R-390 mailing list
 > Home:  Help: 

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