[Phono-L] wire wound link cord -DD reproducers

[Ron L'Herault]

I wonder if slipping a bit of silicone rubber tubing on the link would
accomplish the same thing.

Ron L

-----Original Message-----
From: phono-l-bounces at oldcrank.org [mailto:phono-l-bounces at oldcrank.org] On
Behalf Of Greg Bogantz
Sent: Saturday, April 04, 2009 9:14 PM
To: Antique Phonograph List
Subject: Re: [Phono-L] wire wound link cord -DD reproducers

    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" <lherault at bu.edu>
To: "'Antique Phonograph List'" <phono-l at oldcrank.org>; 
<phonolist at yahoogroups.com>
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 

_______________________________________________
Phono-L mailing list
http://phono-l.oldcrank.org