[R-390] R-390 Digest, Vol 192, Issue 5
Richard (Skip) Green
k7yoo at yahoo.com
Sun Apr 26 10:47:16 EDT 2020
My guess is that this is a “Johnny Cash” R390 (like his Cadillac).
A few years back there was a 75A4 that appeared and it was a similar concoction. At one time the Collins surplus store had a lot of neat stuff show up. Perhaps that was the origin. Not enough to build a complete radio, but enough to start a good project. Military scrap depots were also a good source for a lot of project starts. I acquired an R 391 that was minus the IF and a few other items and homebrewed it into a Frankenradio....it was, after all, free
Sent from my iPad
> On Apr 25, 2020, at 10:29 AM, r-390-request at mailman.qth.net wrote:
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> Today's Topics:
>
> 1. Re: Unfamiliar R-390 variant on ebay overnight (thoyer)
> 2. Re: Unfamiliar R-390 variant on ebay overnight (thoyer)
> 3. RRe: Unfamiliar R-390 variant on eBay overnight (Paul Galpin)
> 4. Re: Unfamiliar R-390 variant on ebay overnight (Jacques Fortin)
> 5. Re: Unfamiliar R-390 variant on ebay overnight (Bob Young)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 24 Apr 2020 20:42:47 -0400
> From: "thoyer" <thoyer1 at verizon.net>
> To: "'Jacques Fortin'" <jacques.f at videotron.ca>, "'Les Locklear'"
> <leslocklear at hotmail.com>
> Cc: r-390 at mailman.qth.net
> Subject: Re: [R-390] Unfamiliar R-390 variant on ebay overnight
> Message-ID: <638ED11E9DE64307A54B27F06E1CBEA5 at TomHP>
> Content-Type: text/plain; charset="us-ascii"
>
> Received notice seller added more pics
>
> Tom
> W3TA
>
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
> On Behalf Of thoyer via R-390
> Sent: Friday, April 24, 2020 7:20 PM
> To: 'Jacques Fortin'; 'Les Locklear'
> Cc: r-390 at mailman.qth.net
> Subject: Re: [R-390] Unfamiliar R-390 variant on ebay overnight
>
> I asked the seller to post more pictures including the rear and underside -
> We'll see if they respond.
>
> Tom
> W3TA
>
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
> On Behalf Of Jacques Fortin
> Sent: Friday, April 24, 2020 4:18 PM
> To: 'Les Locklear'
> Cc: r-390 at mailman.qth.net
> Subject: Re: [R-390] Unfamiliar R-390 variant on ebay overnight
>
> Hi Les,
>
> I do not believe that is an original R-390 front panel, but if ever it is an
> early prototype, this is the first one ever seen.
> I agree that what can be seen in the pictures could be useable.
> The RF deck is an early one (before MOD 2).
> The IF deck can be used to make a R-725, however it does not seems to be an
> early one.
> There are pencil marks on the top of Z501 that came from the alignment
> process.
> Seeing the serial number of the IF deck can provide more clues.
> Just wondering what the underside and back may look like...
>
> 73, Jacques, VE2JFE
>
> ______________________________________________________________
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>
> ------------------------------
>
> Message: 2
> Date: Fri, 24 Apr 2020 20:42:47 -0400
> From: "thoyer" <thoyer1 at verizon.net>
> To: "'Jacques Fortin'" <jacques.f at videotron.ca>, "'Les Locklear'"
> <leslocklear at hotmail.com>
> Cc: r-390 at mailman.qth.net
> Subject: Re: [R-390] Unfamiliar R-390 variant on ebay overnight
> Message-ID: <638ED11E9DE64307A54B27F06E1CBEA5 at TomHP>
> Content-Type: text/plain; charset="us-ascii"
>
> Received notice seller added more pics
>
> Tom
> W3TA
>
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
> On Behalf Of thoyer via R-390
> Sent: Friday, April 24, 2020 7:20 PM
> To: 'Jacques Fortin'; 'Les Locklear'
> Cc: r-390 at mailman.qth.net
> Subject: Re: [R-390] Unfamiliar R-390 variant on ebay overnight
>
> I asked the seller to post more pictures including the rear and underside -
> We'll see if they respond.
>
> Tom
> W3TA
>
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
> On Behalf Of Jacques Fortin
> Sent: Friday, April 24, 2020 4:18 PM
> To: 'Les Locklear'
> Cc: r-390 at mailman.qth.net
> Subject: Re: [R-390] Unfamiliar R-390 variant on ebay overnight
>
> Hi Les,
>
> I do not believe that is an original R-390 front panel, but if ever it is an
> early prototype, this is the first one ever seen.
> I agree that what can be seen in the pictures could be useable.
> The RF deck is an early one (before MOD 2).
> The IF deck can be used to make a R-725, however it does not seems to be an
> early one.
> There are pencil marks on the top of Z501 that came from the alignment
> process.
> Seeing the serial number of the IF deck can provide more clues.
> Just wondering what the underside and back may look like...
>
> 73, Jacques, VE2JFE
>
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 25 Apr 2020 17:08:06 +0200
> From: "Paul Galpin" <galpinp at absamail.co.za>
> To: <r-390 at mailman.qth.net>
> Subject: [R-390] RRe: Unfamiliar R-390 variant on eBay overnight
> Message-ID:
> <!&!AAAAAAAAAAAYAAAAAAAAANUJ8Vu+yetJsiWaq7xnPVjCgAAAEAAAAGfaVbiwlttDqmCxfQQULBcBAAAAAA==@absamail.co.za>
>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi guys,
> Have a good lockdown!
>
> Now that the seller has put up more pictures, it shouts out "early pre-production
> model" to me. If that is so, then surely it has some real value?
> I would bid on it myself, but I would probably have to get a second mortgage to pay
> for the shipping costs to South Africa. And now that I'm 80, it might not get here in
> time!
>
> A nice piece of radio history!
>
> Paul Galpin
> ZS2PG
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sat, 25 Apr 2020 11:11:40 -0400
> From: "Jacques Fortin" <jacques.f at videotron.ca>
> To: <R-390 at mailman.qth.net>
> Subject: Re: [R-390] Unfamiliar R-390 variant on ebay overnight
> Message-ID: <[email protected]>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi all,
>
> The new pictures added by the seller raises more questions than they give
> answers.
> The back panel looks like a homemade job, and not a good one either.
> If this set was originally a normal production R-390, why the two connector
> blocks had not been kept ?
> Why also the signal level meter is on the left side when the related wiring
> have to be at the right ??
> Looking at the only underside picture provided, the PSU seems to be a
> "normal" one, despite that the 26Z5s had been replaced by SS diodes (we can
> even see one in the picture, thru the hole left by the tubes sockets
> removal).
> The filtering cap(s), however, are not the normal production one. Parts
> replacement ??? Seems to show 5 - 1000VDC on the one that can be "read".
> On the opposite corner, the C103 is an electrolytic, instead of the "normal"
> oil-filled 10?F, 300V GE part.
> The AF/regulator deck looks like a "normal" one, despite that one tube is
> missing in the provided picture (have to be one of the two 5651).
> But the three 10K to 600 ohms transformers are there, so what happened to
> the LINE Output controls, meter/range switch and connections ???
> The most puzzling for the end: despite that the "bottom" picture did not
> have a good resolution, the serial number on the 70H-2 PTO can be read.
> Are you seeing the same as I do that this number is only a 5 ???
> So.... A basement hacking job, or a real pre-production item ?
> Whoever will buy this one will have a chance to provide definitive
> answers...
>
> 73, Jacques, VE2JFE
>
>
>
> ------------------------------
>
> Message: 5
> Date: Sat, 25 Apr 2020 15:15:57 +0000
> From: Bob Young <bobyoung53 at hotmail.com>
> To: "r-390 at mailman.qth.net" <r-390 at mailman.qth.net>
> Subject: Re: [R-390] Unfamiliar R-390 variant on ebay overnight
> Message-ID:
> <DM6PR16MB3626D9DE508F40B4B985B287CCD10 at DM6PR16MB3626.namprd16.prod.outlook.com>
>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Yes, serial number 5, that is strange.
>
> Bob
> kb1okl
>
> ________________________________
> From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> on behalf of Jacques Fortin <jacques.f at videotron.ca>
> Sent: Saturday, April 25, 2020 11:11 AM
> To: R-390 at mailman.qth.net <R-390 at mailman.qth.net>
> Subject: Re: [R-390] Unfamiliar R-390 variant on ebay overnight
>
> Hi all,
>
> The new pictures added by the seller raises more questions than they give
> answers.
> The back panel looks like a homemade job, and not a good one either.
> If this set was originally a normal production R-390, why the two connector
> blocks had not been kept ?
> Why also the signal level meter is on the left side when the related wiring
> have to be at the right ??
> Looking at the only underside picture provided, the PSU seems to be a
> "normal" one, despite that the 26Z5s had been replaced by SS diodes (we can
> even see one in the picture, thru the hole left by the tubes sockets
> removal).
> The filtering cap(s), however, are not the normal production one. Parts
> replacement ??? Seems to show 5 - 1000VDC on the one that can be "read".
> On the opposite corner, the C103 is an electrolytic, instead of the "normal"
> oil-filled 10?F, 300V GE part.
> The AF/regulator deck looks like a "normal" one, despite that one tube is
> missing in the provided picture (have to be one of the two 5651).
> But the three 10K to 600 ohms transformers are there, so what happened to
> the LINE Output controls, meter/range switch and connections ???
> The most puzzling for the end: despite that the "bottom" picture did not
> have a good resolution, the serial number on the 70H-2 PTO can be read.
> Are you seeing the same as I do that this number is only a 5 ???
> So.... A basement hacking job, or a real pre-production item ?
> Whoever will buy this one will have a chance to provide definitive
> answers...
>
> 73, Jacques, VE2JFE
>
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
> ------------------------------
>
> _______________________________________________
> R-390 mailing list
> R-390 at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/r-390
>
>
> End of R-390 Digest, Vol 192, Issue 5
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