How to characterise unknown transformer - diyAudio
Go Back   Home > Forums > Design & Build > Parts
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 31st January 2005, 06:42 AM   #1
pixpop is offline pixpop  United States
diyAudio Member
pixpop's Avatar
Join Date: Jan 2005
Location: Los Angeles
Send a message via Skype™ to pixpop
Default How to characterise unknown transformer

I have some old equipment to pull apart for parts, which includes a power transformer. How do I measure the transformer to determine it's characteristics so I can decide what to use it for? In circuit, it generates 45-0-45 VDC, but how do I figure out how much current it can supply? Do I apply an increasing load until it gets hot, or look for a certain amount of ripple.. what's the best method?
  Reply With Quote
Old 31st January 2005, 08:40 AM   #2
diyAudio Moderator
pinkmouse's Avatar
Join Date: Apr 2002
Location: Rotherham, England
An easy way to estimate is to look at the enclosure it came in. It should have a required wattage label somewhere on it, usually near the power inlet. Other than that, look at the on board fuses, they are usually 25% to 50% over rated for the normal running load.
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  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
Unknown Transformer 6f6 Tubes / Valves 4 5th April 2007 06:14 PM
Unknown mA on Gardners mains transformer Layberinthius Tubes / Valves 6 19th January 2006 12:04 PM
Unknown Toroid Transformer VA mrlots2do Power Supplies 25 28th April 2005 07:13 PM
Unknown transformer rating?? bigparsnip Parts 4 4th June 2003 09:26 AM
unknown transformer capabilities Jared Solid State 7 19th September 2002 02:41 AM

New To Site? Need Help?

All times are GMT. The time now is 12:09 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