The Edisonic reproducer was a later refinement of the Dance reproducer. You can read the patent disclosure for the Dance in US patent #1,711,265 which details the claims for the additional weight and the springs that were added. Much of this description is technological baloney, but it served to get Edison yet another patent. The claim made for wrapping the link between the stylus bar and the diaphragm was that this damped the spurious vibrations and resonances in the link. It probably did that, but it also added more moving mass to the system which served to lower the overall resonance. I have found that none of the additional dampers and springs serve any real, useful purpose. When I change the diaphragm in a Dance or Edisonic, I use one of my standard DD diaphragms with the same link and remove the additional springs. The performance is better than what you get in a standard DD reproducer because of the additional tracking force created by the bigger weight. The additional weight adds more mass to the stylus bar fulcrum so that bass performance is also improved by lowering the weight/fulcrum resonant frequency. That's all there really is to it.
Greg Bogantz ----- Original Message ----- From: "Ron L'Herault" <[email protected]> To: "'Antique Phonograph List'" <[email protected]>; <[email protected]> Sent: Saturday, April 04, 2009 8:43 PM Subject: [Phono-L] wire wound link cord -DD reproducers > The Edisonic reproducers that I have seen have fine wire wound along the > length of the cord linking diaphragm to needle bar. Why? Was it to make > the cord stronger? Was it for some sonic reason or for another reason I > have not though of? > > Ron L > > _______________________________________________ > Phono-L mailing list > http://phono-l.oldcrank.org
