Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Planars & Exotics ESL's, planars, and alternative technologies

Summer Project - Replication of MBL loudspeaker 101mkII
Summer Project - Replication of MBL loudspeaker 101mkII
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 2012, 10:30 PM   #11
Magnasanti is offline Magnasanti  United States
diyAudio Member
 
Magnasanti's Avatar
 
Join Date: May 2012
Location: Georgia
Summer Project - Replication of MBL loudspeaker 101mkII
Default Model of metal machining

This illustration shows the specifications for the top plate and steel rods which need to be machined.
Attached Images
File Type: jpg MBl mid construction.jpg (31.7 KB, 1333 views)
  Reply With Quote
Old 7th October 2012, 01:57 PM   #12
Magnasanti is offline Magnasanti  United States
diyAudio Member
 
Magnasanti's Avatar
 
Join Date: May 2012
Location: Georgia
Summer Project - Replication of MBL loudspeaker 101mkII
Default Updated Illustration showing Rods, Top-plate and casing

This is an illustration showing the specifications of the Rods, Top-Plate, and Casing.
Attached Images
File Type: jpg MBl mid construction 2.jpg (44.3 KB, 1281 views)
  Reply With Quote
Old 8th October 2012, 04:21 AM   #13
Magnasanti is offline Magnasanti  United States
diyAudio Member
 
Magnasanti's Avatar
 
Join Date: May 2012
Location: Georgia
Summer Project - Replication of MBL loudspeaker 101mkII
Default 3D Cad Models

3D Cad models ready for machining.
Attached Images
File Type: png Top plate.png (21.9 KB, 1220 views)
File Type: png Rods.png (23.8 KB, 1175 views)
File Type: png casing.png (32.7 KB, 1168 views)
  Reply With Quote
Old 8th October 2012, 11:30 PM   #14
AVWERK is offline AVWERK  United States
diyAudio Member
 
AVWERK's Avatar
 
Join Date: Jan 2004
Location: So Calif.
I,m amazed by the use of copper for the melons. You would think something lighter would work out better and add some sensitivity along the way.
But then again, when you have house amps this size who cares!

Regards
David
  Reply With Quote
Old 9th November 2012, 06:34 PM   #15
Magnasanti is offline Magnasanti  United States
diyAudio Member
 
Magnasanti's Avatar
 
Join Date: May 2012
Location: Georgia
Summer Project - Replication of MBL loudspeaker 101mkII
Default Machined Top-Plate

Here is a picture of the machined Top-Plate. Which has been machined to exacting specifications.
Attached Images
File Type: jpg photo.jpg (226.6 KB, 186 views)
  Reply With Quote
Old 13th November 2012, 02:31 PM   #16
Magnasanti is offline Magnasanti  United States
diyAudio Member
 
Magnasanti's Avatar
 
Join Date: May 2012
Location: Georgia
Summer Project - Replication of MBL loudspeaker 101mkII
Default Rods have been machined

Here is a picture of the rods that have been machined, to exacting specifications.
Attached Images
File Type: jpg rod.jpg (326.5 KB, 165 views)
  Reply With Quote
Old 21st November 2012, 08:09 AM   #17
Magnasanti is offline Magnasanti  United States
diyAudio Member
 
Magnasanti's Avatar
 
Join Date: May 2012
Location: Georgia
Summer Project - Replication of MBL loudspeaker 101mkII
Default Casing

Here is a picture of the Machined Casing that has been pressed fit against the Top-Plate.
Attached Images
File Type: jpeg image.jpeg (280.4 KB, 133 views)
  Reply With Quote
Old 21st November 2012, 11:30 AM   #18
Jay is offline Jay  Indonesia
Banned
 
Join Date: Feb 2003
Location: Jakarta
Why not build a space shuttle instead
  Reply With Quote
Old 21st November 2012, 12:05 PM   #19
Magnasanti is offline Magnasanti  United States
diyAudio Member
 
Magnasanti's Avatar
 
Join Date: May 2012
Location: Georgia
Summer Project - Replication of MBL loudspeaker 101mkII
When I said no uneducated comments, I didn't mean no praise
Thanks for the kind words.
  Reply With Quote
Old 21st November 2012, 08:45 PM   #20
akmark is offline akmark
diyAudio Member
 
Join Date: Sep 2012
Magnasanti,

Thanks for answering my questions on the other thread. It sounds like you have a good approach - make the metallic base parts that the lamellas attach to before making the lamellas, otherwise you won't be able to test the lamellas. That's great you have made the mold for the lamellas though. The mold is the hard part, as the fun part is actually making the parts from the mold.

Once you said 'samurai' carbon fiber, I immediately though pressurized/heat setting, but you already have a plan to vacuum bag and cure it in the oven. Do you have the compresser and bag equipment? What type of oven are you using to heat set these parts? I have some equipment at work I can use (compresser, bags, all types of ovens, mill, lathe), otherwise most of this work is done in my garage haha. I do not plan on using fiberglass for my cones, but it's cheap and I wanted to see what I was working with before spending more on aerospace grade carbon fiber or pre-pregs (many types of fiber materials her: www.hexcel.com). The only other fiberglass work I've done before this was repairing surfboards.

So you had to purchase a driver specifically for it's voice coil and magnet? Is it the Dayton Audio RS52AN listed in another one of your posts? I'm still on the look for voice coil sources, but it may be cheaper to buy cheap speakers from parts-express.com or wherever.
  Reply With Quote

Reply


Summer Project - Replication of MBL loudspeaker 101mkIIHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Summer Project - Replication of MBL loudspeaker 101mkII Magnasanti Planars & Exotics 77 21st November 2012 08:31 AM
Possible Summer Project bose301s Multi-Way 8 17th June 2009 11:25 PM
Possible Summer Project bose301s Multi-Way 8 29th May 2009 07:49 PM
Opinions on a Summer Project athos56 Multi-Way 19 13th May 2007 10:40 PM
Summer Project edjosh23 Multi-Way 19 9th June 2005 01:37 AM


New To Site? Need Help?

All times are GMT. The time now is 11:48 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki