120v 60hz 2.5a Transformer - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 23rd August 2012, 01:23 AM   #1
diyAudio Member
Join Date: Jul 2012
Default 120v 60hz 2.5a Transformer

Hi, this is my first post on here.

I recently sourced a transformer from a Sherwood RX-4109 that is rated at 120v 60hz 2.5a, and I'm wondering if this would be suitable for my LM3886 build. It's a simple stereo setup with 1 PSB and 2 amp boards. Thanks in advance guys.
  Reply With Quote
Old 23rd August 2012, 09:36 AM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
2.5Aac & 120Vac gives ~300VA.
That would indicate a much bigger amplifier than 60W+60W into 8ohms.

The 3886 has a +-42Vdc maximum supply voltage.

Your transformer must not give out more than 28Vac -0- 28Vac when open circuit secondary and the mains voltage is at your nominal supply voltage.

If it is >28Vac you are likely to blow up your 3886 chips.
regards Andrew T.
Sent from my desktop computer using a keyboard
  Reply With Quote
Old 25th August 2012, 02:24 PM   #3
diyAudio Member
Join Date: Jul 2012
Thanks for the reply. That's what I suspected. I'm going to stick with a 22-0-22 300va toroidal for this project.
  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
230 50hz-120v 60hz flatheadmurre Power Supplies 0 15th September 2011 08:22 AM
Using a large 60hz toroid transformer as an SMPS transformer EWorkshop1708 Power Supplies 20 22nd June 2011 08:05 PM
Cyrus II 120v Transformer Tazzer9999 Solid State 4 11th April 2011 12:57 PM
I need a 120v ct transformer... Where to look? ThSpeakerDude88 Tubes / Valves 15 24th March 2007 02:19 AM
big audio amp as an inverter 120v/60Hz mikepecchio Everything Else 9 29th September 2005 09:00 AM

New To Site? Need Help?

All times are GMT. The time now is 07:14 PM.

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