How thick for MYLAR??? - Page 5 - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

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 13th December 2005, 10:05 PM   #41
diyAudio Member
 
Join Date: Nov 2005
Location: Southern Germany
Hi Bazukaz,

i guess that you have a problem with your coating. What you explain sounds typical. It is not easy to achieve a homogeneous coating by graphite rubbing. It is very important that you rub very strong. You did right if you need a shower after rubbing e.g. one square meter.

Capaciti
  Reply With Quote
Old 13th December 2005, 10:42 PM   #42
Bazukaz is offline Bazukaz  Lithuania
diyAudio Member
 
Bazukaz's Avatar
 
Join Date: Nov 2005
Location: Vilnius
Send a message via Skype™ to Bazukaz
Thanks for help.

I have read about the following method of coating :

Max. of fish line Nylon is dissolved in a boiling vinegar acid.
One drop of liquid soap is added to around 50 ml of solution.
It is then sprayed on mylar film.

However , i could not archieve uniform surface , even when spraying with a compressor.

Maybe it is because only 70% acid has been used.

Has anybody else used this method ?

Lukas
  Reply With Quote
Old 13th December 2005, 10:43 PM   #43
diyAudio Member
 
Join Date: Jul 2005
Location: Georgia
you have a schematic of your hv supply.
  Reply With Quote
Old 13th December 2005, 10:57 PM   #44
Bazukaz is offline Bazukaz  Lithuania
diyAudio Member
 
Bazukaz's Avatar
 
Join Date: Nov 2005
Location: Vilnius
Send a message via Skype™ to Bazukaz
Currently i am using the following :
Attached Images
File Type: gif myhv.gif (4.0 KB, 155 views)
  Reply With Quote
Old 14th December 2005, 12:16 PM   #45
Calvin is offline Calvin  Germany
diyAudio Member
 
Calvin's Avatar
 
Join Date: Nov 2004
Location: close to Basel
Hi,

we have a ESL-forum here in Germany. One of the members had very great difficulties with the nylon-coating. Under no circumstances did he get any good results, even though he tried several versions (doped/undoped etc.). His coating didnt stick well to the diaphragm either (he used Mylar or Hostaphan so the material of the foil wasnt the point). He eventually changed to a coating I suggested him and since then his ESL worked as supposed to. Id regard to change the coating. There are several recipes to be found that seem to work flawlessly, even highly transparent ones (if thats a decision criterium).
The only reason Id use Nylon would be to rebuild a Quad with the original sound. In any other case...no!

jauu
Calvin
  Reply With Quote
Old 14th December 2005, 12:49 PM   #46
diyAudio Member
 
Join Date: Apr 2005
Location: Utrecht
Hi,

There are many kinds of nylons (polyamids). Some will dissolve in formic acid, others need phenol to dissolve. Both are toxic, especially phenol. Phenol has very low LD50 and can be absorbed through the skin. (one gram phenol can be lethal!)
You should be aware of the properties of the chemicals you're using. If not, don't do it!
The use of soap is to lower the resistance. Pure nylon has a too high resistance for many esls. Unfortunately, the soap molecules tend to migrate to the surface and leave the coating.
There will be some more problems with the recipe you've mentioned, conclusion: not recommended.
Please check the audiocircuit (www.audiocircuit.com), go to electrostatic loudspeakers/materials/coatings.
Here you will find my EC-coating too!
__________________
drs M.J. Dijkstra
  Reply With Quote
Old 14th December 2005, 03:06 PM   #47
Lucius is offline Lucius  United States
diyAudio Member
 
Join Date: Sep 2005
Quote:
Post #37

there is no need for "C" quality. C is just a calibrated type with lower tolerance on thickness, but standard is not worse.

You can either use "Mylar" or the german brand "Hostaphan". its the same material.

Take a look at

www.shackman.de.
Capaciti,

Thanks for the site. A little difficult to get on and move
about but nice place to visit plus the foils they had.
In the meantime I can get a roll of 46 gauge (11.7)m
400mm x 300m PVDC (saran) for a good price.

I'm thinking maybe my older ears won't value the thinner
films. Although I seem to be the only one looking like a
madman cupping my ears when an ambulance whizzes by.

Lucius
  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
Thick carpet finish for loudspeakers rhapsodee Multi-Way 4 28th July 2009 05:28 PM
Cutting Thick! Phenolic Laminate wrenchone Construction Tips 4 16th July 2009 07:51 AM
FS: Cardas female RCA (GRFA S Thick) Monkey King Swap Meet 5 27th January 2009 10:13 AM
2" baffle to thick? basham Subwoofers 1 11th December 2005 07:52 PM
heavy and thick electricity wire moonshow Parts 4 10th August 2003 01:56 AM


New To Site? Need Help?

All times are GMT. The time now is 12:58 AM.


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