ESL Diaphragm coating - Page 49 - 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 December 2011, 02:26 PM   #481
diyAudio Member
 
Join Date: Aug 2010
Someone from the forums PM'd me. I'll have the licron crystal soon
  Reply With Quote
Old 17th December 2011, 02:34 PM   #482
tyu is offline tyu  United States
diyAudio Member
 
Join Date: Jul 2009
Well thanks for all the info on the cotings......but i gess i give it some time you guys are nailing it down...6300...this is diff than the Licron Crystal..are thay made by ....techspray.
thanks
  Reply With Quote
Old 17th December 2011, 02:51 PM   #483
diyAudio Member
 
Audiofanatic's Avatar
 
Join Date: Oct 2002
Location: The Netherlands, Utrecht
Default Ordering 6300

Hi Zweetvoetje,

I'll try to order a sample or buy a gallon (or less) of the 6300 and will send you a sample if you want


Best,

Audiofanatic
__________________
Be nice to animals.
  Reply With Quote
Old 23rd December 2011, 05:02 AM   #484
SM7UYJ is offline SM7UYJ  Sweden
diyAudio Member
 
SM7UYJ's Avatar
 
Join Date: Dec 2004
Location: Staffanstorp
I have just got a sample of Staticide 6300 and a similar product from a local supplier.

I have some questions for you guys who use this coating:

1. How do you apply it to the diaphragm? (spray, brush, sponge...)

2. Do you dilute it ? (if so, with what)

3. What surface resistance did you get?

In my initial tests I got different resistance readings (5x10^6 and 400x10^6) when coating undiluted with a sponge.

/R
__________________
The probability of someone watching you is proportional to the stupidity of your action.
- A. Kindsvater
  Reply With Quote
Old 23rd December 2011, 06:53 AM   #485
diyAudio Member
 
chinsettawong's Avatar
 
Join Date: Jun 2006
I put just a few tiny drops of 6300 on the diaphragm surface and wipe the surface with a damp sponge. I never try to measure its resistance though.

Since it's water base, you can dilute it with water if you want to.

Wachara C.
  Reply With Quote
Old 23rd December 2011, 07:08 AM   #486
SM7UYJ is offline SM7UYJ  Sweden
diyAudio Member
 
SM7UYJ's Avatar
 
Join Date: Dec 2004
Location: Staffanstorp
Wachara:
When you say damp sponge, it is water or S 6300 you have "in" the sponge?

If it is water, then you dilute the soultion when whiping it on the Mylar right?

/R
__________________
The probability of someone watching you is proportional to the stupidity of your action.
- A. Kindsvater
  Reply With Quote
Old 23rd December 2011, 07:16 AM   #487
diyAudio Member
 
chinsettawong's Avatar
 
Join Date: Jun 2006
I actually damp the spong with water. I guess I did dilute the solution a bit when wiping with this damp sponge.

Wachara C.
  Reply With Quote
Old 23rd December 2011, 04:08 PM   #488
diyAudio Member
 
alexberg's Avatar
 
Join Date: Oct 2009
Quote:
Originally Posted by SM7UYJ View Post
I have just got a sample of Staticide 6300 and a similar product from a local supplier.

I have some questions for you guys who use this coating:

/R
That might not be my "know-how" but rather collective wisdom (Star Trek, sorry cant help it) I've used. And it's probably posted elsewhere around And forgive me if it's your recipe I am prescribing
That's what I did

I've applied it with the polyurethane foam wedge shaped brush.
Further steps are not that simple.
First of all you need to decide what resistance you need
Second - make samples as many of fellow DIYers have done: paint a strip across mylar strip (decreased and activated - the latter was described as well). After an hour or so (you may use hot air to speedup the process, remember?) using simple stencil made of paper, paint two stripes by graphite 33 over the coated area. Now you've got "Zebra": two highly conductive strips reliably connected to the coating. Let's say 10 cm(4") wide stripe of Mylar, 5 cm wide painted 6300 stripe across, two graphite stripes 1 cm wide and 1 cm wide coated stripe (graphite free) in between. Using DVM as ampere! meter! (usually DVM has fixed input resistance 1Meg Ohm (read specs)) apply around 1kV (using as many precautions as one possibly can) and calculate the resistance using Ohm's law. Readings for Ohm per square can be easily be derived as R(U/I)*Width(10cm)/Length(1cm)
Do not try to use high voltage - edges of graphite stripes are really sharp, so corona discharge develops pretty easily (ozone smell and hissing if you are really reckless) thus screwing your measurements.
That's it - make few test stripes as described with the different dilution factor.
Choose the solution you consider to be the appropriate one.
Undiluted 6300 yields too thick of a coating...
One of the ways to check thickness is to cut coated film preferably at 45 deg angle and use microscope. Knowing the film thickness you can easily estimate the one of the coating.
"Practice makes it perfect" together with the Lord of Darkness who resides in the details
Happy trying!
Alex
Edit: As soon as you can produce reproducible (resistance wise) coating you are ready to go...

Last edited by alexberg; 23rd December 2011 at 04:30 PM.
  Reply With Quote
Old 24th December 2011, 09:16 AM   #489
SM7UYJ is offline SM7UYJ  Sweden
diyAudio Member
 
SM7UYJ's Avatar
 
Join Date: Dec 2004
Location: Staffanstorp
When my coating samples had dried for two days, the results were a lot better!

My test setup is:

- PSU 1200V DC
- 10MOhm voltmeter
- Multimeter with 10kV high voltage probe
- DIY surface probe (17x80mm copper rods spaced 5mm for 1:16)

Click the image to open in full size.

When I measure the Staticide coated Mylar I get ~1 GOhm square - perfect for my needs!

I'm expecting a delivery on tuesday of a ESD procuct I can mix with Elvamide. As heat treated Elvamide sticks like tar to Mylar I would like to use this on panels that are hard to split and recoat.

/R
__________________
The probability of someone watching you is proportional to the stupidity of your action.
- A. Kindsvater
  Reply With Quote
Old 24th December 2011, 03:02 PM   #490
diyAudio Member
 
alexberg's Avatar
 
Join Date: Oct 2009
SM7UYJ
Sounds great. Have you done adhesion test?
With the probe you are using it's near impossible to have reliable contact along the edge. So the painted electrode is better.
Use force drying - it's allowed by TDS: chinsettawong mentioned that naturally dried coating is kinda tacky. I have not observed that though.
The nice thing about 6300 is the very fast resistance recovery after moisture exposure: try to breathe on the coating and measure the resistance change over time...
I tried 2 varieties of soluble polyamide - none had good adhesion whatsoever.
Try moisture test on Elvamide...
  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 07:30 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