AMT diaphragm DIY basics. - 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 9th December 2010, 08:26 PM   #1
diyAudio Member
 
Join Date: Dec 2005
Location: essex
Default AMT diaphragm DIY basics.

Just recently got interested in AMT's, i think i might try a few things out to try and learn about them.

I know nothing about them yet though so ive got a few basic questions regarding the diaphragms.

Ive seen the link to the multi page DIY PDF but it doesnt answer my questions.

Its not a nice way to write this, but i think numbered questions may be the easiest way for me to ask these questions. Seems a little rude though, sorry.

1. Pleats, i assume these dont want to touch (not due to shorting as the conductors are insulated, but just from a movement point of view)

2. Mounting, do the complete diaphragms just mount from the sides? Seem too, but in my mind that doesnt seem very stable. Are they left free at the top and bottom?

3. Could they be mounted from the top and bottom of the pleats and the sides left free?

4. The conductor, is the up and down layout important? Or, could all the pleat conductors be in series, but electricaly conducting in the same direction (i.e. each conductor conducts top to bottom, but all in series, not parallel)

5. If the pleated diaphragm is as dimensionaly weak as my mind thinks, when supported just from the sides, what stops it falling into contact with the front/back plates?

Ive probably got more questions, and the answers may spark new questions too.

I have a few 'unusual' ideas that may or may not work, if the answers give hope to my ideas ill try and draw/post my ideas, see what you guys think.


Thanks
  Reply With Quote
Old 9th December 2010, 09:59 PM   #2
diyAudio Member
 
Join Date: Dec 2005
Location: essex
6. Traditional DIY diaphragms have the conductor going up-down-up-down etc.
If the diaphragm was just aluminium, the current would flow through the pleats forward/back/forward etc.
Any reason not to do this?
I assume you'd need the magnet field in a different direction to compensate?


P.S., sorry if my questions are showing up my lack of knowledge on this
  Reply With Quote
Old 9th December 2010, 10:17 PM   #3
49 - for the 18th time - again!
diyAudio Member
 
c2cthomas's Avatar
 
Join Date: Oct 2006
Location: Near "Music City" (Nashville Tennessee)
Start here - Air Motion Transformer - Wikipedia, the free encyclopedia
Several patents are listed so take a look at them - of course only the basic ideas for the patent are presented and not the actual "magic" of how to really make them or any trade secrets. You will find some foil patterns in the Heil patent tho.

There are some photo's of the replacement diaphragms over at Parts Express that will give you some points -
__________________
DIY audio can be expensive but getting to see things go up in smoke - that's priceless!!!! ..... "whatever - call it brainfart of Mighty ZM"
  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
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 weighted diaphragm stretcher (pic) arend-jan Planars & Exotics 25 3rd April 2008 12:37 PM
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 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