Ribbon tweeter Matching Transformer That really Works - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 5th May 2012, 08:19 PM   #1
diyAudio Member
fooeywuffle's Avatar
Join Date: Nov 2009
Location: Southern California
Default Ribbon tweeter Matching Transformer That really Works

I tried regular iron cores, and they are more than 50 percent lossy, so tried Ferrite. The size of the core is 2 3/16 inches square and no gap. It is wound based on RF tech used for transistor linear power amps, so not an easy job. For ribbon resistance of .03 ohm, which is what the ones I made are, the ratio is 17 to 1. just for 36 watts, that is 36 amps on secondary! I used 5 mil copper sheet that is wound so it is a tube when done. layer of foil, wind 16 turns of 2 ea #21, then another foil. Side ends are pinched together and soldered making it a flatened tube. 4 of these in series to complete it. The connection ends of both of the foils has a piece doubled over and soldered. This is because of the high current. I tested it for the amount of voltage it would take with little loss. For 3 Kc lowest frequency, it would take 35 volts RMS, which at 8 ohms is over 150 watts! The ribbon won't even handle that! This has almost 100 percent coupling, and very little loss.
Attached Images
File Type: jpg TR-C.jpg (147.4 KB, 204 views)
  Reply With Quote


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
How to make a good transformer for ribbon tweeter? pecamuzicar Planars & Exotics 212 23rd April 2017 09:51 AM
STRATHEARN ribbon matching transformers bikelectro Swap Meet 0 8th March 2010 12:09 PM
Fountek ribbon tweeter 3cm2 ribbon black square alumunum faceplate lduarte1973 Multi-Way 3 16th June 2009 08:50 AM
Matching dispersion between ribbon and woofer Defo Multi-Way 8 12th June 2009 12:29 AM
Matching Ribbon ( planars ) with cone woofers?? JinMTVT Multi-Way 3 15th October 2004 09:23 PM

New To Site? Need Help?

All times are GMT. The time now is 10:06 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2