Planar speaker - first try - Page 8 - 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 23rd October 2010, 08:06 PM   #71
bentl is offline bentl  Norway
diyAudio Member
 
Join Date: Apr 2009
Location: Norway
Default Finally!!

Ah! Finally some progress!

I actually completed one of my planars tonight and listen to it just now!
I used the CPC tape, 5 lengths of 800mm length. The resistance is 4,3 ohm in total.

I designed the speaker to use 2mm diaphragm-magnet distance, but during the built the distance was increased to 4mm (doubled the layer of VHB tape)

The frame is a mock-up at the moment, it will be precision made and "self bearing" and used as the frame for the grille cloth.

Planar1.jpgPA230076.jpg

The speaker sounds quite OK, high/middle range is fine but it lacks a bit in the bottom.



I used 6 times 15 neo-magnets 10X10X40 mm

If I am ever to to build a different speaker, I will use magnets that are "flat" so they won´t try to turn when fixing them to the perforated steel plate.

50 mm long, 10mm wide and 3mm thick would be a better solution for building I think

I will try to measure frequency response tomorrow and post on the forum.

Regards

Bent
  Reply With Quote
Old 23rd October 2010, 11:39 PM   #72
diyAudio Member
 
Join Date: Oct 2010
I have one old magneplanar 1.6 whose membranes have ben ruined.
Can somebody teel me where i can find foil for membranes?
  Reply With Quote
Old 24th October 2010, 09:41 AM   #73
diyAudio Member
 
Join Date: Dec 2008
Here is a way of turning the alufoil. Put tape that is adhedsive on both sides,like tape for fastening carpets,where the turns are.This will help ,that the alufoil do not stik to your fingers to much.The alutape on the pics. is 3 mm.
[IMG]Click the image to open in full size.[/IMG]
[IMG]Click the image to open in full size.[/IMG]
  Reply With Quote
Old 24th October 2010, 09:46 AM   #74
Baldin is offline Baldin  Denmark
diyAudio Member
 
Baldin's Avatar
 
Join Date: Jan 2005
Location: Copenhagen
Send a message via MSN to Baldin
Hi bonsai
Thanks for the link.


Hi bentl
Looks really good. Congratulations.
Two comments.

1. I think you can get more out of your magnets, and have a more uniform drive on the entire diaphragm. Let the alu foil go over to the middle of the magnets. Either run two alu strips between each pair of magnets, or use more magnets and more strips. This will give higher sensitivity, higher resistance and better drive.

2. To get more and better bass, block the airflow between the outer frame and the diaphragm. You might as well get the most out of the overall size you are using
Attached Images
File Type: jpg 001.jpg (48.1 KB, 532 views)
__________________
Visit www.sensibleaudio.dk or read latest news on Baldin's Blog
  Reply With Quote
Old 24th October 2010, 09:55 AM   #75
Baldin is offline Baldin  Denmark
diyAudio Member
 
Baldin's Avatar
 
Join Date: Jan 2005
Location: Copenhagen
Send a message via MSN to Baldin
Quote:
Originally Posted by båndsei View Post
Here is a way of turning the alufoil. Put tape that is adhedsive on both sides,like tape for fastening carpets,where the turns are.This will help ,that the alufoil do not stik to your fingers to much.The alutape on the pics. is 3 mm.
Did you use the same process as before for splitting the 9mm alu into 3mm (by use of a drill machine, where the roll of alu is mounted and then just cutting into it as it turns)?

How good does the adhesive seems to work. Do you think it is something that will last for years after years?

Kind regards Baldin
__________________
Visit www.sensibleaudio.dk or read latest news on Baldin's Blog
  Reply With Quote
Old 24th October 2010, 10:51 AM   #76
diyAudio Member
 
Join Date: Dec 2008
It seems to be a very strong adhesive and as it is intended to be used for windows sequrity and beeing washed regulary alongwith the windows,i belive it can last for many years.
I am cutting it as it turns,but i have to use another machine than a regular drillmachine.
I will post some pictures later.
  Reply With Quote
Old 24th October 2010, 11:32 AM   #77
diyAudio Member
 
Join Date: Oct 2010
On my old magneplanar 1.6 i have wires,i don't have alufoil.
I asked where i can find foil for membranes?
  Reply With Quote
Old 30th October 2010, 08:33 AM   #78
Baldin is offline Baldin  Denmark
diyAudio Member
 
Baldin's Avatar
 
Join Date: Jan 2005
Location: Copenhagen
Send a message via MSN to Baldin
CPC UK don´t seem to ship outside UK .......
Does anyone have a secont supplyer .... seems that with todays IR alarm systems, this kind of tape is just not som common anymore .....
__________________
Visit www.sensibleaudio.dk or read latest news on Baldin's Blog

Last edited by Baldin; 30th October 2010 at 08:35 AM.
  Reply With Quote
Old 30th October 2010, 08:35 AM   #79
Baldin is offline Baldin  Denmark
diyAudio Member
 
Baldin's Avatar
 
Join Date: Jan 2005
Location: Copenhagen
Send a message via MSN to Baldin
Quote:
Originally Posted by båndsei View Post
It seems to be a very strong adhesive and as it is intended to be used for windows sequrity and beeing washed regulary alongwith the windows,i belive it can last for many years.
I am cutting it as it turns,but i have to use another machine than a regular drillmachine.
I will post some pictures later.
Stille dying to see some pictures of the cutting jig.
Would like to get started again with my planars .... it's beeen way too long ...
If it can be cut in sat 2 mm, I think it could also be used in some smalle AMT/Heil unit ....

But I need somewhere to buy the tape first
__________________
Visit www.sensibleaudio.dk or read latest news on Baldin's Blog
  Reply With Quote
Old 30th October 2010, 10:52 AM   #80
bentl is offline bentl  Norway
diyAudio Member
 
Join Date: Apr 2009
Location: Norway
Try contacting InternationalSales(at)cpc.co.uk replace (AT) with @

If no success send me a PM and I will see if I can get hold of some more

Bent
  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 01:28 PM
Anybody seen this type of planar speaker? WrineX Planars & Exotics 18 20th August 2012 02:36 AM
My DIY planar speaker! Matt MacBeth Planars & Exotics 5 1st July 2010 09:29 AM
need help picking a planar speaker lochness Multi-Way 5 30th May 2007 08:42 AM
planar 25 vs planar 3 GAK Analogue Source 2 30th January 2004 03:38 PM


New To Site? Need Help?

All times are GMT. The time now is 12:26 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