Page 4 of 4

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Sun Aug 15, 2021 6:41 pm
by electra225
I would be thrilled to share pictures. Both the Stereo Theater and the computer with the pics are in storage. When I get them home, I will share pictures.

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Sun Aug 15, 2021 11:50 pm
by TC Chris
Hi-Fi-Mogul wrote: ↑Fri Aug 13, 2021 3:40 am

I use a 1950's little manual drill all the time that I found
in some gentleman's workshop.

At the end of my general-purpose shop workbench is a Black & Decker 1950s 1/4" electric drill motor that belonged to an old family friend,who also sold me his drill press, radial-arm saw, and scroll saw. My brother later gave me the same man's wood lathe. I think of him every time I grab that little drill or any one of his other tools.

Chris Campbell

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Mon Aug 16, 2021 4:07 pm
by Hi-Fi-Mogul
I know we like photos. Here's a couple of the 9-ES-6J.

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Tue Aug 17, 2021 12:00 pm
by William
Three tubes and two speakers, it should sound pretty good? I have always like the looks of RCA changers.

Bill

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Wed Aug 18, 2021 1:31 am
by TC Chris
Is that RCA changer VM-related? I see that little record-size sensing device next to the turntable. And the over-arm looks VM-like.

Chris Campbell

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Wed Aug 18, 2021 2:50 am
by Hi-Fi-Mogul
Bill,
Someone hacked the original speakers and put in
a 6x9 Utah with a whizzer cone.
I was concerned at first, but when it all went back
into the cabinet it sounds really good.
Even with 0.5 V Pfanstiehl P-226 cartridge,
I can't turn the volume up full.

Chris,
RCA used V-M changers up until I believe around
1954.
I could not find a source, but I distinctly remember
a discussion on ARF about a patent suit that V-M
brought vs RCA.

Until 1960?, RCA kept the 4 speed turret and idler
set up that was in the early V-M 900 series changers.
And yes, the record support arm placement on the
changer base is how the V-M 900s had theirs.
https://thevoiceofmusic.com/popup_pics. ... &TITLE=972

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Wed Aug 18, 2021 11:52 pm
by William
A couple of weeks ago I found that same exact unit in an antique store. I pretty much tripped over it as it was sitting on the floor in the walk way. And, yes, it did follow me home.

Bill

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Thu Aug 19, 2021 2:19 am
by Hi-Fi-Mogul
William wrote: ↑Wed Aug 18, 2021 11:52 pm A couple of weeks ago I found that same exact unit in an antique store. I pretty much tripped over it as it was sitting on the floor in the walk way. And, yes, it did follow me home. Bill
Bill,
I'll be waiting to hear about the restoration of
your RCA twin sister.

Regarding the dual speakers:
I've had several brands of these record players
with 2 x 5 " speakers or similar.
For some acoustic reasons unknown to me,
they performed exceptionally well.
Especially the bass end. Not what would
be expected, but there it is.

My belief is that even lower end products were
actually constructed with at least a minimum
of acoustic engineering behind them.
Maybe due to market competition of the day,
and a desire to have a decent sound.
Columbia kind of started the movement
in 1953, with their "360 Sound" side-firing
dual speaker tabletop hi-fi's.

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Thu Aug 19, 2021 11:53 am
by William
Actually, I found the model you shared in the link. It's a VM model 972. Three tubes, and an oval speaker. It needs total everything, and for now it's just sitting on a shelf looking pretty. Here's a photo from Gary's site, which is probably where your came from.

https://www.thevoiceofmusic.com/popup_p ... &TITLE=972

Bill

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Thu Aug 19, 2021 1:18 pm
by Hi-Fi-Mogul
William wrote: ↑Thu Aug 19, 2021 11:53 am Actually, I found the model you shared in the link. It's a VM model 972. Three tubes, and an oval speaker. It needs total everything, and for now it's just sitting on a shelf looking pretty. Here's a photo from Gary's site, which is probably where your came from.
Bill
Bill,
Let me know when you start restoration, and
I'll send you the changer and amp service files.

Here's a page from radiomuseum:
www.radiomuseum.org/r/vm_972.html

Re: 1957 RCA 9-ES-6J Schematic Epiphany

Posted: Thu Aug 19, 2021 3:29 pm
by William
Yup, that's it. I like the power rating, 1.5 watts of undistorted power. Thank you for the offer, I will take you up on it when I get that far.

Bill