ESL Diaphragm coating - Page 14 - 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 17th July 2009, 11:31 AM   #131
diyAudio Member
 
Join Date: May 2006
Location: Netherlands
Hi Martin-Jan

for your convenience, here is the plot of the distortion vs SR. The panel is an electrostatic headphone made of circuit board.


Click the image to open in full size.

I quote from a previous post:

"I redid the experiment with the low S/R (1E7) coating and a series resistor of 1E9. With and without the series resistor was only a very small difference in distortion level, absolutely not comparable to what we have seen with the 4E11 coating.

Then I constructed a 5E10 Ohm series resistor but could not get the same level of charge on the diaphragm, and as a consequence the output was about -10dB compared to before. Distortion levels were still up high as with the 1E9 series resistor. "
  Reply With Quote
Old 17th July 2009, 03:42 PM   #132
Few is offline Few  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Maine, USA
Arend-Jan,
Is there a problem with using the nylon coating that you used to create a high resistance coating for your tests?
Few
  Reply With Quote
Old 17th July 2009, 03:50 PM   #133
diyAudio Member
 
Join Date: May 2006
Location: Netherlands
Hi Few,

It's not as easy to apply as modern coatings, and not as super lightweight and thin as conductive polymer coating for example. In reality it works quite well once you get the hang of it, but I suppose we're always looking for 'new and improved', right?
  Reply With Quote
Old 17th July 2009, 04:18 PM   #134
diyAudio Member
 
chinsettawong's Avatar
 
Join Date: Jun 2006
Hi Arend-Jan,

Can I send you a small sample of my recipe for you to take the measurement? I really wonder how mine is.

Wachara C.
  Reply With Quote
Old 17th July 2009, 04:29 PM   #135
diyAudio Member
 
Join Date: May 2006
Location: Netherlands
Hi Wachara,

sure, no problem. Are you having troubles with the measurement?
  Reply With Quote
Old 17th July 2009, 05:07 PM   #136
diyAudio Member
 
chinsettawong's Avatar
 
Join Date: Jun 2006
I have access to the measuring device but I'm not sure how to make an accurate measurement. Maybe I'll take a few photos of the high resistance meter and you can help me.

Wachara C.
  Reply With Quote
Old 17th July 2009, 05:19 PM   #137
diyAudio Member
 
Join Date: May 2006
Location: Netherlands
Hi Wachara,

sure, send me an e-mail.
  Reply With Quote
Old 19th July 2009, 09:12 AM   #138
diyAudio Member
 
Join Date: May 2006
Location: Netherlands
Default Call me a dreamer if you like...


What would this forum be like if we start sharing everything we know?

I get the impression that we like to talk about stuff in here, but when it comes to providing actual information it often gets rather quiet. Or is it just me?
In other words: I don't think we have made any progress in this thread except for the corona treatment device posted by SY.

I understand that for those involved in making a buck from this, that there are some things that won't be shared. There are some things I won't share either, so I leave those subjects at home. There is not much point in bringing them up without the intend to give full disclosure.

Wouldn't you agree that we could all make much more progress if we work together? You may think you're the smartest kid on the block, but believe me we could all learn from each other! Look for example at the open source community. Do you think Linux could have gotten where it is today if those developers were all keeping secrets from each other? Think about it.

Now like I said I'm no saint, I have my "secrets". But I sometimes wish I didn't.
  Reply With Quote
Old 19th July 2009, 11:46 AM   #139
WrineX is offline WrineX  Netherlands
diyAudio Member
 
WrineX's Avatar
 
Join Date: Mar 2004
Location: Den Haag
hmm one thing , does anybody know what coating SOLOSOUND used , because they are still playing 38 years later, it whas low resistance under 1 Meg. i believe twistatic stil uses the same sort, look a little bit dark.
  Reply With Quote
Old 19th July 2009, 01:20 PM   #140
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Low resistance, dark coating- it's probably a carbon-black filled vinyl, not much different than Acoustat's (I think they used polystyrene as a base). Getting low resistance is easy, but as several posters have pointed out, high resistance coatings correlate with lower distortion.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  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
PCB coating rs1026 Parts 10 2nd December 2011 11:08 PM
ESL Diaphragm Coating - HELP GlidingDutchman Planars & Exotics 9 14th March 2008 10:53 AM
Help with diaphragm coating furly Planars & Exotics 6 17th January 2006 08:23 PM
Diaphragm coating Bazukaz Planars & Exotics 9 15th January 2006 07:27 PM
ESL diaphragm coating I_Forgot Planars & Exotics 58 4th April 2005 05:54 AM


New To Site? Need Help?

All times are GMT. The time now is 08:57 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