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 <steve_nor...@msn.com> To: Antique Phonograph List <phono-l@oldcrank.org> 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: john9...@pacbell.net > To: phono-l@oldcrank.org > 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
