If it is a zinc die casting they were cast. The retaining rings were
probably machined.
On 08/18/2013 08:36 PM, Ron L'Herault wrote:
I don't know if there are taps that size. My guess is that a large rod was
threaded by cutting the threads in a lathe and then the rod was sliced to
make the rings. The interior threads may have been lathe cut as well.
Ron
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Steven Medved
Sent: Sunday, August 18, 2013 5:48 PM
To: Antique Phonograph List
Subject: Re: [Phono-L] Curious Diamond B problem
Ron L,
Excellent idea, I would lack the skill and equipment to do it, no wonder
that would never have entered my mind.
I have thought about a giant tap for the ones that have shrunk, do you know
the size?
Steve
From: [email protected]
To: [email protected]
Date: Sun, 18 Aug 2013 15:13:56 -0400
Subject: Re: [Phono-L] Curious Diamond B problem
It's a brass ring, right? I wonder if you could slit the ring and
soft solder in a spacer that is either just shy of the threads or
filed to match the threads?
Ron L
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of john robles
Sent: Sunday, August 18, 2013 9:50 AM
To: Antique Phonograph List
Subject: Re: [Phono-L] Curious Diamond B problem
Steve, the diameter of both the Diamond B and Diamond C compressions
rings is 1.66. The inside diameter of the Diamond C body is 1.66. The
inner diameter of the Diamond B body ranges up to1.6730, and is
slightly inconsistent in circumference. So there is obvious enlargement
there.
John
________________________________
From: Steven Medved <[email protected]>
To: Antique Phonograph List <[email protected]>
Sent: Sunday, August 18, 2013 5:26 AM
Subject: Re: [Phono-L] Curious Diamond B problem
Normally the Diamond B does not expand that much unless it was stored
where temperatures varied over the years like an unheated attic where
it got very cold in the winter and very hot in the summer. Pot metal
reproducer on Vancouver Island in the Victoria area remain pristine
due to the relative small variance in temperature.
Edison compression rings vary in diameter from 1.59 to 1.69. If the
largest ring you have will not thread I use Teflon tape because it
will allow easy removal.
With the Model R and S you have the opposite problem and need a
smaller ring. That's Pot Metal Folks.
Steve
Date: Sun, 18 Aug 2013 04:39:49 -0700
From: [email protected]
To: [email protected]
Subject: [Phono-L] Curious Diamond B problem
Hello all
I have a Diamond B reproducer with a curious problem. I went to
rebuild
it, and when I tried to unscrew the diaphragm retaining ring, it
turned but did not want to come out. Finally I eased it out by
unscrewing while working a small screwdriver blade under it to help
push it outward. When it came out, I noticed that it had Scotch tape
wrapped around it. When I removed the tape and went to screw it back
into the reproducer, it fell to the bottom of the reproducer body. The
threads did not engage with the body. I had another ring from a
Diamond C and it did the same thing, but both rings worked in the
Diamond C. I thought they were two different sized reproducer bodies, but
apparently they are supposed to be the same diameter.
A knowledgeable collector friend suggested that the pot metal body
of the
Diamond B might have expanded. Has anyone else had this happen? What
would be a solution, other than shimming the ring again? Or is that THE
solution?
Thanks
John Robles
_______________________________________________
Phono-L mailing list
http://phono-l.org
_______________________________________________
Phono-L mailing list
http://phono-l.org
_______________________________________________
Phono-L mailing list
http://phono-l.org
_______________________________________________
Phono-L mailing list
http://phono-l.org
_______________________________________________
Phono-L mailing list
http://phono-l.org
_______________________________________________
Phono-L mailing list
http://phono-l.org
_______________________________________________
Phono-L mailing list
http://phono-l.org
