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 9th September 2004, 04:25 AM   #1
dvdwmth is offline dvdwmth  Canada
diyAudio Member
 
Join Date: Apr 2004
Location: Toronto
Default Can someone explain this tranformer?

I am reposting this from another thread because its important I get this question answered before I carry on with my project.

I had mistakenly been using an over powered transformer in my last project and I'm now building an lm3876 Amp that I need a new power supply for.

I went to the surplus store and spotted a couple of 24V 75VA transformers and figured they'd do the trick.

I've just unpacked them and now I see there are three primary wires . They are labelled:

120 V 1-------------)
95 V 2-------------)
0 V 3-------------)

the label says

PRI 95/120, 60Hz
SEC 24V, 75VA

So why are there three primaries. Im hoping that this is a supply for EITHER 95V or 120V and that I can just connect the appropriate wire, but I'm not going to assume that.

Can I use this thing or do I have to go buy yet another pair or transformers.
  Reply With Quote
Old 9th September 2004, 05:19 AM   #2
diyAudio Member
 
Join Date: May 2002
Location: Switzerland
It is exactly how you assumed: You'll have to connect 3 and 2 for 95 Volts or 3 and 1 vor 120 Valts and you'll be happy !

Regards

Charles

BTW: Where, for heaven's sake, is 95 Volts used ?
  Reply With Quote
Old 9th September 2004, 06:04 AM   #3
diyAudio Member
 
runebivrin's Avatar
 
Join Date: Jul 2003
Location: Huddinge, Sweden
Send a message via MSN to runebivrin
Quote:
Originally posted by phase_accurate
BTW: Where, for heaven's sake, is 95 Volts used ?
On the far end of a really bad power distribution line?

Rune
__________________
Do wizards use spell checkers?
  Reply With Quote
Old 9th September 2004, 06:09 AM   #4
diyAudio Moderator
 
JojoD818's Avatar
 
Join Date: Mar 2003
Location: searching...
Your replies make me laugh literally.
  Reply With Quote
Old 9th September 2004, 07:33 AM   #5
dvdwmth is offline dvdwmth  Canada
diyAudio Member
 
Join Date: Apr 2004
Location: Toronto
Thats a relief.

Im started to collect a bit of a pile of transformers that didn't work out for some reason or another.

I wondered exactly the same thing about the 95V.
  Reply With Quote
Old 9th September 2004, 08:03 AM   #6
diyAudio Member
 
Join Date: May 2002
Location: Switzerland
The answer from our friend from the Philipines leads to the assumption that mains voltages below 100 volts are (unintentionally ?) used there.

Regards

Charles
  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
Toasted PW tranformer? whitelabrat Tubes / Valves 16 2nd January 2008 01:42 PM
need power tranformer ideas luthierwnc Tubes / Valves 8 18th December 2007 08:38 AM
Step down tranformer jkeny Everything Else 2 18th October 2005 12:14 AM
Tranformer question CPX Parts 3 7th February 2005 07:44 PM
Torodial Tranformer Calculation JanDH Parts 34 28th December 2003 02:34 PM


New To Site? Need Help?

All times are GMT. The time now is 11:02 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