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
