Transformer Cases - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 25th September 2012, 09:48 PM   #1
TP143 is offline TP143  United States
diyAudio Member
 
Join Date: Jan 2012
Default Transformer Cases

Are transformer cases necessary? They claim to isolate the transformer from interference but they cost half the price of the transformer itself. Just curious if this money is better spent elsewhere.

Thanks
  Reply With Quote
Old 25th September 2012, 11:13 PM   #2
Minion is offline Minion  Canada
diyAudio Member
 
Join Date: May 2006
Location: Cowican Bay , vancouver island
A transformer emitts a magnetic field that can cause noise in audio curcuits but you can generally mitigate this with carefull positioning of the transformer .......
  Reply With Quote
Old 25th September 2012, 11:28 PM   #3
AJT is offline AJT  Philippines
diyAudio Moderator
 
AJT's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
end-bells are used mainly for mechanical protection of the transformer windings.....a box type traffo cover is better imho.....i assume you mean EI's, for torroids, it is not even necessary...
__________________
the best advertisement for a good audio design is the number of diy'ers wanting to build it after all the years....never the say so of so called gurus....
  Reply With Quote
Old 26th September 2012, 01:29 AM   #4
TP143 is offline TP143  United States
diyAudio Member
 
Join Date: Jan 2012
I was referring to the metal box that houses the torroid, such as part CA-400 on the Antek site.

Thanks
  Reply With Quote
Old 26th September 2012, 01:38 AM   #5
Minion is offline Minion  Canada
diyAudio Member
 
Join Date: May 2006
Location: Cowican Bay , vancouver island
Generally a torroid isn"t going to emmit a magnetic field into your audio curcuit unless your transformer is really close to your audio curcuit and is oriented in a way that points the EMI into your curcuit in which case you just change the orientation of the torroid ... a torroid has up to 8:1 reduction in magnetic field compared to an EI Transformer ....
  Reply With Quote
Old 5th October 2012, 10:06 PM   #6
Einric is offline Einric  United States
diyAudio Member
 
Einric's Avatar
 
Join Date: Feb 2011
Location: Bozeman, MT
I have thought about using a cover of some sort for my toroids just for aesthetic reasons.
Painted end bells look nice and having an open toroid might look funny next to nice EI cores.
  Reply With Quote
Old 7th October 2012, 12:15 PM   #7
frank1 is offline frank1  United Kingdom
diyAudio Member
 
Join Date: Apr 2006
Location: Devon UK
Quote:
Originally Posted by TP143 View Post
Are transformer cases necessary? They claim to isolate the transformer from interference but they cost half the price of the transformer itself. Just curious if this money is better spent elsewhere.

Thanks
I would say that in VERY critical, high gain, low level applications a mu-metal (magnetic) screening can would be useful.
In a power amp, no.
Don't forget, transformers do need cooling.
Frank
  Reply With Quote
Old 7th October 2012, 12:23 PM   #8
diyAudio Member
 
Join Date: Jun 2010
Location: St. Petersburg
Morgan Jones writes about the subject in his book.
  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
cases for our amps bull041161 Class D 7 2nd April 2009 09:54 PM
Amplifier Cases... damianl Solid State 8 13th September 2007 11:06 PM
where to look for cases roofingboom Solid State 6 31st May 2004 03:57 PM


New To Site? Need Help?

All times are GMT. The time now is 01:59 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