John,
Measure them in different places.
Steve
> Date: Sun, 18 Aug 2013 06:49:58 -0700
> From: [email protected]
> To: [email protected]
> 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
>
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