Whizzer cone repair - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 24th July 2006, 12:57 PM   #1
diyAudio Member
 
Join Date: Jul 2006
Send a message via AIM to ConExp Send a message via MSN to ConExp Send a message via Yahoo to ConExp
Default Whizzer cone repair

Hello al,

I have a pair of Fostex 168sigma (old style with whizzer cone). One of the whizzers was damaged, crushed, deformed but not ruptured.

Please recommend on how to repair it.

I have tried to impregnate a piece of paper with cyanoacrylate adhesive. It is easy to apply and it stiffens the paper quite a lot, what do you think about this option?

Any input help?
  Reply With Quote
Old 24th July 2006, 04:19 PM   #2
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Sounds like a good move. Alternatively, something like an artist's varnish should do well. Also, think about getting hold of some of Dave's phase plugs whilst you're at it. They make quite a difference.
__________________
Community sites www.frugal-horn.com http://frugal-phile.com/
  Reply With Quote
Old 24th July 2006, 05:04 PM   #3
dnsey is offline dnsey  United Kingdom
diyAudio Member
 
Join Date: Mar 2004
Location: Shropshire, England
I recently used a light spray coat of acrylic varnish to stiffen a damaged whizzer cone on a Decca FR driver (another thread soon if my project is sucessful).
The result was to smooth the HF response considerably, but to curtail the maximum HF.
YMMV of course.
  Reply With Quote
Old 24th July 2006, 05:14 PM   #4
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

another option is to remove both whizzers and add supertweeters.
Adding phase plugs also if you want.

/sreten.
  Reply With Quote
Old 24th July 2006, 09:41 PM   #5
diyAudio Member
 
Join Date: Jan 2006
Location: Cz Rep.
Cheers,
I have been succesful with two pack epoxi glue. The standard Araldit from Casco works good. The tricky thing is that you have to dilute it with alcohol to get down the viscosity in order to apply it with a brush.
It takes some 24 hours to dry but you are revarded with a strong yet flexible film that have made wonders with some woofers of mine.
Good luck/Peter
  Reply With Quote
Old 24th July 2006, 11:27 PM   #6
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Good tip -will have to try that. What sort of alcohol did you use BTW? Isopropyl, Surgical Spirit, or a decent vodka or similar?
__________________
Community sites www.frugal-horn.com http://frugal-phile.com/
  Reply With Quote
Old 26th July 2006, 10:27 AM   #7
diyAudio Member
 
Join Date: Jan 2006
Location: Cz Rep.
Hi again!
It proved to be difficult to find info about dilutant for Araldit. I have used a Swedish brand that are available in gas stations. However I have found out, by practical experiment, that 1-METHOXIPROPAN-2-OL(ouch) work better than ethanol.
You could also ask for the CAS number (chemical number) 107-98-2, since there excist lot of different suppliers. Dowanol PM is one that I know of.
It seems that a ratio of 1:2 epoxi:thinner is ok.

This thinner is slower than ethanol and therefore easier to apply.
For precaution I have applied it on a paper this morning, and will leave it over night so to see if it dries properly.

BTW Scott, Decent Vodka is better internally, but maybe not at the same time when dealing with precious speakers.
Regards Peter
  Reply With Quote
Old 27th July 2006, 07:45 AM   #8
diyAudio Member
 
Join Date: Jan 2006
Location: Cz Rep.
Hi again!
The mixture above is ok. It has dried properly. I have used this solution when dealing with peaks in midrange. It reduces for sure the highs. I'm not sure what it will do with a whizzer. Maybe a harder glue/lacquer would be better.

Peter
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Solution for Whizzer Cone Rattle? tripathdude Full Range 5 6th January 2009 04:41 PM
full range without whizzer cone NED 209 Full Range 31 13th January 2008 01:04 AM
Re-attacheing whizzer cone Nuuk Full Range 3 24th August 2006 05:28 PM
Has anyone removed the whizzer cone from a Fostex full range driver?? zygibajt Full Range 7 2nd June 2006 02:29 PM
Seas 11F-lGWD full range with whizzer cone capslock Full Range 1 7th October 2005 07:26 AM


New To Site? Need Help?

All times are GMT. The time now is 02:32 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2