Waveguides and horns - Page 78 - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 26th September 2011, 06:34 PM   #771
jzagaja is offline jzagaja  Poland
diyAudio Member
 
Join Date: Jun 2004
Location: Szczecin
Send a message via Skype™ to jzagaja
Quote:
Originally Posted by gedlee View Post
There should be at least ten elements along this line. The flux should fall almost to zero at each end of the plot. can you post the model?
That's true. Set mesh size manually and now difference is small. Of course flux in gap is not homogeneous. BC DE250 cross section shows more elegant design. Do you know how large are real looses with non armco iron? FEMM seems to overestimate carbon steel.
Attached Images
File Type: gif D800_FEMM.gif (14.0 KB, 533 views)
File Type: jpg DE250.jpg (46.0 KB, 533 views)
__________________
Visit us at http://www.horns.pl/
The SEOS™ Project http://www.avsforum.com/t/1291022/he...-rallying-here
  Reply With Quote
Old 26th September 2011, 07:45 PM   #772
gedlee is offline gedlee  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Novi, Michigan
Only the manufacturer is going to know that, if even they know it. Its not easy to get and very few companies would supply it. And if they are Chinese you can bet that its what they "hope" it will be not what it actually is.

Are you sure that all the longer the coil is, plus its excursion? That looks very small and a huge waste of the flux field. Terrible design if thats true.
  Reply With Quote
Old 26th September 2011, 07:56 PM   #773
diyAudio Member
 
Join Date: Jan 2004
Location: Toronto, ON, Canada
Wait a sec... jzagaja, are you:

1) Designing your own compression driver
2) Designing a retrofit-able phase plug
3) Doing this for fun?
  Reply With Quote
Old 26th September 2011, 08:24 PM   #774
jzagaja is offline jzagaja  Poland
diyAudio Member
 
Join Date: Jun 2004
Location: Szczecin
Send a message via Skype™ to jzagaja
At this stage it is for fun meaning making my own diaphragms, phase plugs. I took D800Ti driver as parts (it is available for everyone) prior magnetizing. STX is now making it's own coils using Tokoku CCAW.
__________________
Visit us at http://www.horns.pl/
The SEOS™ Project http://www.avsforum.com/t/1291022/he...-rallying-here
  Reply With Quote
Old 27th September 2011, 08:47 AM   #775
Jmmlc is offline Jmmlc  France
R.I.P.
 
Join Date: Oct 2005
Hello Jack,

I think you have a lot of work to do in order to improve the linearity of the flux inside the gap.

For comparison here is a project I used to study several years ago.

Best regards

Jean-Michel Le Cléac'h


Quote:
Originally Posted by jzagaja View Post
That's true. Set mesh size manually and now difference is small. Of course flux in gap is not homogeneous. BC DE250 cross section shows more elegant design. Do you know how large are real looses with non armco iron? FEMM seems to overestimate carbon steel.
Attached Images
File Type: gif Excitation_1_entrefer.gif (22.0 KB, 525 views)
File Type: gif Excitation_1_profile.gif (4.0 KB, 492 views)
  Reply With Quote
Old 27th September 2011, 09:14 AM   #776
jzagaja is offline jzagaja  Poland
diyAudio Member
 
Join Date: Jun 2004
Location: Szczecin
Send a message via Skype™ to jzagaja
Do you know real driver with such a smooth magnetic circuit? It seems for fast flare phase plug better use (now expensive) neodymium magnets (example JBL 476Be). Magnetizer is limited to outer diameter 250mm so for bass driver pole pieces must be mounted outside.
__________________
Visit us at http://www.horns.pl/
The SEOS™ Project http://www.avsforum.com/t/1291022/he...-rallying-here
  Reply With Quote
Old 27th September 2011, 06:15 PM   #777
diyAudio Member
 
Join Date: Feb 2008
Sorry to change the subject but does Erich or anyone know anything about the group buy shipment? Last I heard, we were hoping for a productive September. Thanks. Fingers crossed.
  Reply With Quote
Old 27th September 2011, 06:36 PM   #778
jzagaja is offline jzagaja  Poland
diyAudio Member
 
Join Date: Jun 2004
Location: Szczecin
Send a message via Skype™ to jzagaja
One pellet is ready for shipping as far as I know.
__________________
Visit us at http://www.horns.pl/
The SEOS™ Project http://www.avsforum.com/t/1291022/he...-rallying-here
  Reply With Quote
Old 2nd October 2011, 08:17 PM   #779
...truth seeker...
diyAudio Member
 
Ed LaFontaine's Avatar
 
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
How does the SEOS-RAAL fit up with the RAAL 140-15D?
.
Does the INOX front plate get covered in any way? Particularly any of the the sawtooth edge?
.
What benefits or changes to the response are there from using the waveguide?
  Reply With Quote
Old 4th October 2011, 05:25 PM   #780
jzagaja is offline jzagaja  Poland
diyAudio Member
 
Join Date: Jun 2004
Location: Szczecin
Send a message via Skype™ to jzagaja
SEOS-RAAL mounting copies RAAL 140-15D frontplate. Throat covers sawtooth (design width 27mm). We don't have this driver so I can't show any measurements.
__________________
Visit us at http://www.horns.pl/
The SEOS™ Project http://www.avsforum.com/t/1291022/he...-rallying-here
  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
smith horns and using compression horns for a Karlson party speaker project bikehorn Multi-Way 14 30th January 2013 05:20 PM
Horns inside of horns open foe discussion oilcanracer Multi-Way 3 15th February 2010 03:42 AM
Compression drivers in horns or waveguides 454Casull Multi-Way 6 1st December 2008 12:41 PM
Phase plug necessity in horns/waveguides 454Casull Multi-Way 3 18th September 2005 07:36 PM
Horns: Vibrations and resonances in metal horns Rocky Multi-Way 10 28th July 2004 01:38 AM


New To Site? Need Help?

All times are GMT. The time now is 10:27 AM.


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