torque tube to coil links?

Post: # 10644Unread post **emidisc** Mon Sep 20, 2010 3:42 pm

I am looking for some assistance on my DIY stereo cutter head project,
specificially the links attaching the coils to the torque tube,
the current method of attachment i am using appears to restrict the movement of the coils, so do any of you kind people have any details you could provide ie. material, type of connection ideally detailed piccis
thanks in advance.....
emidisc

Post: # 10650Unread post **piaptk** Mon Sep 20, 2010 7:36 pm

You should PM Markrob I believe he has built a homemade stereo head, and also Flozki... He's making one for production.

Post: # 10659Unread post **aaron** Tue Sep 21, 2010 8:59 am

Maybe someone could chime in here, I'm interested to hear this as well.

Post: # 10661Unread post **markrob** Tue Sep 21, 2010 10:44 am

Hi,

I used piano wire (atually guitar strings).

http://home.comcast.net/~markrob1066/pwpimages/Cutter%20Bottom.JPG

They are stiff on axis so they can push against the stylus holder, but have flex from side to side. They are solderable, so it was easy to attach to my copper cones that were glued to the speaker voice coils. Areas of concern are secondary resonsances that kill high freq response. When I get back to work on this design, its an area to work on. I based my design on US patent 3053943 by Bachman of CBS ca. 1962. He has a different approach to coupling that is interesting. If you don't have access, PM me with you email and I'll be glad to send you a copy. Do you have any photo's of your attempts?

Mark

Post: # 10662Unread post d Tue Sep 21, 2010 11:00 am

Hey,

My appraoch was different. As a holder I used a aluminum rod. Then made little tracks where the links from the cones touches the holder edge. Made a 1.6mm screw-in and fixed them with a little peace of aluminum cutted from the same diameter rod. Very similar to Westrex 3d head.

Before I did it other way just using a bigger screw. I found only this picture http://picasaweb.google.com/dovilis/20100715#5494155773839650850
You cannot see the rodds, but they are pressed to holder with the screw.

Sorry don't have latest pictures but maybe You understood what I wanted to say.

good luck

Post: # 10669Unread post **emidisc** Tue Sep 21, 2010 5:39 pm

thanks for the input
where is Flo when you need him.......
Carusso! I think I will name mine Fred Dibnah
Emidisc

Post: # 10677Unread post **Dub Studio** Wed Sep 22, 2010 4:06 am

Here is a nice little explanation. I guess you have come across it already but just in case, here you go:

http://www.aardvarkmastering.com/westrex.htm