Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Restoring old suspension
Restoring old suspension
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 22nd June 2008, 04:58 AM   #1
rjb is offline rjb  New Zealand
diyAudio Member
 
Join Date: Jun 2004
Location: Piha
Default Restoring old suspension

I have been playing with a number of old woofers from the seventies, and it is clear from T&S testing of a number of pairs of units that the treated cloth front and rear suspensions have stiffened a little with age. The measured differences between identical units are quite significant in some cases, and the original manufacturers information also indicates changes in the suspension.

In the case of Richard Allan units, (cloth front and rear),the front suspension is still mildly tacky to touch, but for these and for Philips, rubber front still good, cloth rear), Coral (very stiff cloth front now replaced by rubber, cloth rear) and others, the rear suspension is not at all sticky.

Any suggestions for treatment to restore flexibility?Thanks.
  Reply With Quote
Old 23rd June 2008, 03:54 AM   #2
rjb is offline rjb  New Zealand
diyAudio Member
 
Join Date: Jun 2004
Location: Piha
No suggestions?

Ah well, does anybody know what was used of stiffening the material?

Some form of Varnish? Resin? Gum Arabic?
  Reply With Quote

Reply


Restoring old suspensionHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Restoring B&W 2200 cliffforrest Multi-Way 23 9th June 2010 09:35 PM
Restoring Veneer richie00boy Everything Else 30 26th March 2007 02:38 PM
HPM-60's Worth Restoring? FORMD Multi-Way 1 2nd August 2005 10:06 PM
help with restoring amp skyraider Tubes / Valves 10 8th May 2004 03:35 AM


New To Site? Need Help?

All times are GMT. The time now is 04:59 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki