Newbie transformer question - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 9th March 2004, 03:56 AM   #1
Lugoman is offline Lugoman  Kyrgyzstan
diyAudio Member
Join Date: Mar 2004
Location: Alabama
Default Newbie transformer question

I have a transformer from an old amplifier that I would like to use in a gainclone. It has two sets of secondary outputs. One set consist of two green wires with a 20.25 volts ac between them and another set of two red wires and a yellow. The voltage between the two reds is 71.2 and the voltage between the yellow and each red is 35.5.

Is the center tap yellow wire the 0 volt line refered to in the gainclone faq? What is the difference between ground and the 0 volt line?

Is there anyway to use the 20.25 volt side that doesnt have the center tap in a gc amp? Is the 71.2 volt side to big?

  Reply With Quote
Old 9th March 2004, 10:20 PM   #2
ir is offline ir  New Zealand
diyAudio Member
Join Date: Aug 2003
Location: WGTN, NZ
Send a message via ICQ to ir
Default Re: Newbie transformer question

yes the yellow is the centre tap. thing is tho, that gives you 35-0-35. after recifying it's going to be approximately +/-49Volts which is way too high. you should try to get hold of something between an 18-0-18 and 25-0-25 transformer

you can use the 20.25 supply if you built your amp as per the "single supply" schematic inthe datasheet. however this needs a lot more parts and makes it a tad more complex - i'm spretty sure it will affect sound quality too (not that much, but still, the amp won't be as pure as it could)
  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
stupid newbie: what is this transformer??? engels Tubes / Valves 8 18th December 2007 04:11 PM
newbie with input tran. question and wiring question imo Solid State 0 18th January 2006 10:10 PM
Newbie Transformer question sachi Chip Amps 5 11th July 2005 06:59 AM
Newbie transformer question Wingfeather Parts 3 28th April 2003 10:10 AM
newbie post, but hopefully not a newbie question wiredcur Solid State 3 24th August 2002 10:49 PM

New To Site? Need Help?

All times are GMT. The time now is 11:56 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