Diy AMT - Page 30 - 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 31st May 2013, 05:01 PM   #291
diyAudio Member
 
Join Date: Feb 2013
Hello, took months reading and trying to understand, I'm so not knowing english, I hope the google translator reflect what I will describe;? Graphene ò if made would improve the molybdenite is invention? I say that already manufacturing capacitors reference purposes and new batteries with graphene and apparently dramatic improvement is apparently graphene is diamagnetic and my meager apparently can increase the speed of the membranes reducing mass and weight, what are you thoughts about this idea ?

Greetings to all.

Last edited by Manubx; 31st May 2013 at 05:17 PM.
  Reply With Quote
Old 31st May 2013, 05:15 PM   #292
Account disabled at member's request
 
Join Date: Sep 2007
Location: Multiple...
I use only copper and not aluminum in my diaphragms...
Aluminum are too much affected by the magnetic field...
  Reply With Quote
Old 1st June 2013, 06:41 PM   #293
ondesx is offline ondesx  France
diyAudio Member
 
Join Date: Apr 2008
Hi RayCtech

I hope you will soon let us see some of your babies !...

What are the frequency range of some of them ?

My Best,
  Reply With Quote
Old 1st June 2013, 09:48 PM   #294
diyAudio Member
 
Join Date: Dec 2008
Quote:
Originally Posted by ondesx View Post
Hello Bernt,

Perhaps this is another easier and probably lighter way to design an AMT diaphragm... These guys are using Graphene as conductors. This will be the thinner way to trace conductors whatever the design !

Here you have a few links to this method...

http://arxiv.org/pdf/1303.2391v1.pdf

Robert Murray-Smith - YouTube

https://www.smashwords.com/books/view/304668

My Best,
I have seen some of theese videoes ,but how do we handle the graphene after fabrication .Is it liquid or powder?

Bernt
  Reply With Quote
Old 4th June 2013, 09:23 AM   #295
ondesx is offline ondesx  France
diyAudio Member
 
Join Date: Apr 2008
It seems it's a sheet of material made of a simple layer (this is why it's so light...). Here you have more info and perhaps... a sample available !

Graphene Industries -> What is graphene?
  Reply With Quote
Old 4th June 2013, 12:33 PM   #296
diyAudio Member
 
Join Date: Dec 2011
It will be some time before we will be able to get graphene sheets of significant size, I'm afraid.

I was reading one of the Beyma research papers about the TPL-150, once again. It seems that they use 12 um Kapton with side-by-side 6 um copper traces. Experimenting with my 24 um Kapton + adhesive, I've found that it does thermoset fairly well, but the silicone glue is tough to cleanly dissolve (with white spirits) without disturbing the Al traces. I have to mechanically pick at it too much. It looks like the 3m 74 tape glue is dissolved more easily.

I think that Beyma's laminate is adhesiveless. I've seen 12 um + Cu Kapton laminate advertised by several producers but can't see where it can be bought in small enough quantities for our purposes.
  Reply With Quote
Old 4th June 2013, 01:30 PM   #297
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
You should use white benzene.
  Reply With Quote
Old 4th June 2013, 04:07 PM   #298
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
Heptane adhesive remover
  Reply With Quote
Old 5th June 2013, 06:39 PM   #299
diyAudio Member
 
Join Date: Dec 2011
Thanks for the link solhaga. The spirits that I tried definitely dissolved the glue but not as quickly as I would like. Can you try the white benzene on your kapton and let me know how quickly the glue comes off vs the rubber adhesive on the polyester tape?

I won't buy anything extra until I've moved back to Australia in 3 weeks time. The waiting is annoying, but at least I get to play around here and there and watch your progress.

As far as etching goes, I'm curious to try a sort of stamp for shielding the traces. Cable ties have the right dimensions. With something slightly soft under the tape+Al I think that you could etch fairly sharp lines.
  Reply With Quote
Old 6th June 2013, 06:29 PM   #300
diyAudio Member
 
Join Date: Dec 2008
I have just recived a sample of 12my alu on 12my mylar. athe alu is not coated on one side
and can be etched.
I have tried to print with a laserprinter:
[IMG]Click the image to open in full size.[/IMG]
alu/paper is taped to a sheat of foto paper.I did not clean the alu before printing.The "ink" pattern can easy be damaged.

Bernt
  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
AMT diaphragm DIY basics. graeme uk Planars & Exotics 2 9th December 2010 10:17 PM
DIY AMT: which of the three replacement diaphragms to use? capslock Planars & Exotics 3 4th July 2010 06:26 PM
big AMT Diy Charcoal Planars & Exotics 27 13th October 2008 07:41 AM
Diy Amt ? woody Planars & Exotics 0 24th September 2005 12:17 PM
Diy Amt JohnL Planars & Exotics 4 29th April 2005 04:16 PM


New To Site? Need Help?

All times are GMT. The time now is 04:26 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