Demagnetizing OPT? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 21st April 2012, 02:32 PM   #1
diyAudio Member
Join Date: Jan 2012
Default Demagnetizing OPT?

I was reading in this paper That silicon steel is susceptible to polarization if subjected to a low frequency signal approaching saturation. I was wondering, can an PP OPT be polarized by a continual inequality from the power tubes being unbalanced? The author mentions methods of core this something any of you bother with in old OPT's before re-use?

Last edited by rntlee; 21st April 2012 at 02:37 PM.
  Reply With Quote
Old 21st April 2012, 03:37 PM   #2
M Gregg is offline M Gregg  England
diyAudio Member
Join Date: Jun 2010
Location: UK
Originally Posted by rntlee View Post
is this something any of you bother with in old OPT's before re-use?

As soon as you put an alternating current through you are demaging it anyway..The other thing is this idea can be cumulative so are you going to demag every so many hours of use? If you have to do this there is something wrong..

One thing I would add is that this idea is similar to tape heads..and yes sometimes you can get improved high freq response with a demag of the head..However if the core fixed magnetizes its not going to be much good anyway is it..

M. Gregg

Last edited by M Gregg; 21st April 2012 at 03:49 PM.
  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
Getting OPT in Japan? lhgin Tubes / Valves 17 27th May 2017 01:37 PM
Demagnetizing tape heads DragonMaster Analogue Source 40 14th June 2011 01:04 PM
OPT identification jazz Tubes / Valves 0 23rd April 2010 03:48 PM
Proof that demagnetizing tubes works georgehifi Tubes / Valves 23 6th March 2005 04:55 PM
demagnetizing (mr. feedback question) Fred Dieckmann Everything Else 44 4th November 2002 11:34 PM

New To Site? Need Help?

All times are GMT. The time now is 01:03 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