[R-390] 390A test jigs

[Nick England]

I found some (not very good) photos of the R-1247, showing those
multi-colored cables -
http://img0055.psstatic.com/102956442_390a-r-1247-receiver-collins-390a-manson-labs-390a-ebay.jpg
http://img0049.psstatic.com/99152618_390a-r-1247-receiver-collins-390a-manson-labs-390a-ebay.jpg
http://img0068.psstatic.com/102956441_390a-r-1247-receiver-collins-390a-manson-labs-390a-ebay.jpg


Nick England K4NYW
www.navy-radio.com

On Fri, Feb 16, 2018 at 2:05 PM, Steve Toth via R-390 <r-390 at mailman.qth.net
> wrote:

> My understanding about the Manson labs receivers (I'm doing this of the
> top of my head, so help me out group if need be), was that Manson Labs
> produced and converted R390A's for NASA starting with the Apollo space
> program.  They also produced an in-field conversion kit so the conversion
> could be done on-site.  The conversion enabled the R390A to be used with
> external precision oscillators for precise frequency control and stability.
> After the conversion the R390A became an R-1247.  The only physical
> appearance difference was three additional BNC interface jacks for the
> external equipment mounted on a plate mounted on the rear panel below the
> standard IF output jack and above the terminal strip and possibly no
> nameplate designating it as an R390A (I happen to have unintentionally
> acquired one of these receivers).
> So maybe this is one of the in-field conversion kits? - Steve
> W7SJT"Always look for a positive solution then Improvise, Adapt, and
> Overcome"- adaptation of the U.S. Marine Corps motto
> "Every day is an opportunity to challenge the achievement of your dreams"
> "Success is not final, failure is not fatal.  It is the courage to
> continue that counts."- Winston Churchill
>
>
>
>
>       From: Tom Chirhart via R-390 <r-390 at mailman.qth.net>
>  To: W4QG <w4qg at cfl.rr.com>
> Cc: R-390 at mailman.qth.net
>  Sent: Thursday, February 15, 2018 6:36 PM
>  Subject: Re: [R-390] 390A test jigs
>
> These are mods made by Manson Labs to the R-390/A..
> 73
> Tom
> K4NCG
>
> Sent from my iPad
>
> > On Feb 14, 2018, at 5:58 PM, W4QG <w4qg at cfl.rr.com> wrote:
> >
> > All,
> >
> > I acquired a set of 4 devices which appear to be test fixtures/jigs.
> They appear to be commercially made.
> > They have markings similar to what would be found 390(A) modules.
> > Stamped on them is "R390A" "CODE 26916" and the part numbers 150-017274,
> 150-017275, 150-017276, 150-017277
> > I've looked through my meager documentation and can't find any reference
> to these.
> > Can someone give me some info on them?  (pictures available if anyone is
> interested)
> >
> > Thanks,
> > Paul W4QG
> >
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