can I use this transformer to power the opamp based preamp? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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 16th June 2009, 05:30 PM   #1
zome is offline zome  Thailand
diyAudio Member
 
Join Date: Jan 2006
Location: Bkk
Default can I use this transformer to power the opamp based preamp?

I'm not sure what the label means. It says 22V----0----22V. (please see picture)

Does it mean already it has 22V and -22V?

If it's not (I'm a newbie, as you can see), is it possible to make it + and - rails? (More precisely I want +15 and -15, I guess I can use 7815 and 7915 voltage regulator?)


Click the image to open in full size.

thank you!
  Reply With Quote
Old 16th June 2009, 06:22 PM   #2
diyAudio Member
 
Join Date: Jan 2004
Location: Toronto, ON, Canada
The 22-0-22 is too much for +/- 15V, while the 12-0-12 is too little. You can use the 12-0-12 winding with 7812/7912.
  Reply With Quote
Old 16th June 2009, 06:40 PM   #3
cbdb is offline cbdb  Canada
diyAudio Member
 
Join Date: Oct 2008
Location: Vancouver
Not to mention its a 300 watt transformer when 30 would probably be overkill.
  Reply With Quote
Old 17th June 2009, 12:27 AM   #4
Minion is offline Minion  Canada
diyAudio Member
 
Join Date: May 2006
Location: Cowican Bay , vancouver island
You can use the 12v-0v-12v to get +/- 15v Unregulated , it will probably be closer to +/-17v but many Opamps can handle +/-18v , but 12v regulators would be better .....

The transformer would be good for a Dual chip Gainclone with a Preamp and/or active EQ section ......
  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
Considerations about opamp based preamp Tolu Solid State 10 12th September 2008 02:10 PM
Opamp based power amp lumanauw Solid State 14 8th October 2007 06:46 PM
opamp input based power amps sparkle Solid State 38 11th May 2007 09:04 AM
Ultra-High performance OpAmp-based MOSFET Power Amp tlf9999 Solid State 20 7th September 2005 10:41 PM
Opamp based preamp, for a gainclone Bricolo Solid State 5 9th March 2003 06:36 PM


New To Site? Need Help?

All times are GMT. The time now is 11:13 AM.


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