Shielded transformer - DIY - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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 11th February 2003, 05:29 AM   #1
2Bak is offline 2Bak  Denmark
diyAudio Member
Join Date: Apr 2002
Default Shielded transformer - DIY

I want to shield a toroid in a Gainclone cabinet. The toroid will be very close to the LM3875T's.
Found these solutions with cobber:

Tell me some more on DIY transformer shielding...
Materials, do's and don'ts etc...

  Reply With Quote
Old 12th February 2003, 05:10 AM   #2
2Bak is offline 2Bak  Denmark
diyAudio Member
Join Date: Apr 2002
...I was lucky to find transformer copper band. Will try it and then post my results afterwards...

  Reply With Quote
Old 12th February 2003, 03:27 PM   #3
Eric is offline Eric  United States
diyAudio Member
Eric's Avatar
Join Date: Nov 2000
Location: Central PA, USA
I, too, had some problems when I placed my supposedly shielded toroid transformer into my chassis. The magnetic fields it generated bled into my signal wires and induced a significant hum in my speakers. After removing the transformer from the chassis, the hum was gone.

So, I got some copper flashing from my local hardware store and cut a strip a little longer than the circumference of the toroid and about 1.5 times the height of the transformer. I left small tabs on the bottom so that I could attach it to the chassis and put the toroid and bridges in the center of it. Upon powering up my amp, it was now nice and quiet. The hum and buzzes are gone!

I think it cost me about $5 for 12" by 24" of copper flashing...
  Reply With Quote
Old 12th February 2003, 04:13 PM   #4
diyAudio Member
jackinnj's Avatar
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Default another application for copper foil

copper foil is not only useful in running groundplanes, but also in application such as this.
  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
Shielded wire fsjonsey Tubes / Valves 7 21st March 2008 03:33 PM
shielded vs. non-shielded mytool4u Instruments and Amps 12 7th July 2005 10:12 PM
Design for SF W14 Shielded MTM Danse Multi-Way 0 15th October 2004 12:37 AM
Shielded woofers jswen Multi-Way 1 5th May 2004 09:02 PM
Shielded cables? Dxvideo Chip Amps 6 22nd January 2004 06:54 AM

New To Site? Need Help?

All times are GMT. The time now is 10:51 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