Planar speaker - first try - Page 3 - 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 September 2010, 01:07 PM   #21
WrineX is offline WrineX  Netherlands
diyAudio Member
 
WrineX's Avatar
 
Join Date: Mar 2004
Location: Den Haag
waht is you distance between magnet and menbrane if you go to 15 hetz, there's allot of air moved, do you have any pictures by the way >?
  Reply With Quote
Old 9th September 2010, 01:13 PM   #22
diyAudio Member
 
Join Date: Jan 2007
Location: wigston leics england
Default Also-

When I put the 4.5 mm alu foil on the membrane, I overlap the width of the cut out and turn the foil thro' 90 degrees then another 90 degrees until you travel in the opposite direction across your membrane. I mark the membrane between the magnets with indelible pen, and cover this with the tape, which is easier to turn than the 9 mm size.
__________________
HENRY
  Reply With Quote
Old 9th September 2010, 01:27 PM   #23
diyAudio Member
 
Join Date: Jan 2007
Location: wigston leics england
The distance is 3 mm. I will be putting more pictures on the imgur sight later. Keeping the membrane nice and tight helps with the bass and cuts down on flapping etc. I won't be building any bigger neos than this size. the bigger size 1000 x 550 mm will be for my ferrite ones as I have many magnets available from downsizing. The gap on the ferrite ones will be 2 mm as these need help when compared with the neo magnets. When you put the magnets on slide them over the perforated steel sheet as they break too easily when dropping them on the sheet, also too dangerous on the fingers as I found out. (2 blood blisters and 2 gashes). A tight membrane all the way round is very important to get rid of funny noises when playing loud music with lots of bass!
__________________
HENRY
  Reply With Quote
Old 9th September 2010, 01:44 PM   #24
diyAudio Member
 
Join Date: Jan 2007
Location: wigston leics england
Default Also-

With my planars you only need 3 resistors for the impedance, no capacitors,. inductors or transformers, and only 4 connectors to the 2 membranes
__________________
HENRY
  Reply With Quote
Old 9th September 2010, 01:53 PM   #25
diyAudio Member
 
Join Date: Jan 2007
Location: wigston leics england
Default Also-

The size of the membrane is about 209 square inches which is quite large for any speaker, with p/p this is doubled!
__________________
HENRY
  Reply With Quote
Old 9th September 2010, 07:00 PM   #26
WrineX is offline WrineX  Netherlands
diyAudio Member
 
WrineX's Avatar
 
Join Date: Mar 2004
Location: Den Haag
When looking at your specs i wonder hoe maggie can even work with such low strength magnets.
  Reply With Quote
Old 9th September 2010, 07:34 PM   #27
a.wayne is offline a.wayne  United States
Sin Bin
 
Join Date: May 2008
Location: Front Row Center
Quote:
Originally Posted by WrineX View Post
When looking at your specs i wonder hoe maggie can even work with such low strength magnets.
Pretty small gap.....
  Reply With Quote
Old 9th September 2010, 08:30 PM   #28
bentl is offline bentl  Norway
diyAudio Member
 
Join Date: Apr 2009
Location: Norway
Hi Henry!

Any advice on how you thigthen the diaphragm?
  Reply With Quote
Old 10th September 2010, 12:24 AM   #29
diyAudio Member
 
Join Date: Jan 2007
Location: wigston leics england
Default diaphragm tightening.

I place the diaphragm in position under the 4 pieces of wood holding it in place. Mark the holes in the diaphragm with an awl , remove the wood then mark round the holes with a square and cut this out the diaphragm, so you can move it in any direction.Place the diaphragm roughly in position and hold with drawing pins at the corners. Place the wooden clamps in position and put a few screws in position. Pull diaphragm tight and tighten the screws in position. Then work your way around pulling the diaphragm tight until you have all the screws in position keep doing this until it is tight all round. Once you have a few screws in position you can remove the drawing pins. So you can complete the gradual tightening. you can see the diaphragm loosing its ripples as you go round loosening and tightening screws. You tap it with your fingers testing the tautness.
__________________
HENRY
  Reply With Quote
Old 10th September 2010, 12:33 AM   #30
diyAudio Member
 
Join Date: Jan 2007
Location: wigston leics england
Default Remaining planar.

Have just finished the last planar of the second pair. The one with the 6 mm at the front and 3 mm at the back.This weighs in at 16 kilos. The one with 3 mm back and front weghs in at 12 kilos. Will hang this in place tomorrow.
__________________
HENRY
  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
Full range planar speaker using neo magnets JAMESBOS Planars & Exotics 335 5th April 2014 02:28 PM
Anybody seen this type of planar speaker? WrineX Planars & Exotics 18 20th August 2012 03:36 AM
My DIY planar speaker! Matt MacBeth Planars & Exotics 5 1st July 2010 10:29 AM
need help picking a planar speaker lochness Multi-Way 5 30th May 2007 09:42 AM
planar 25 vs planar 3 GAK Analogue Source 2 30th January 2004 04:38 PM


New To Site? Need Help?

All times are GMT. The time now is 12:54 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