toroids - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 5th January 2007, 03:45 AM   #1
diyAudio Member
 
Join Date: Mar 2003
Location: Ohio
Default toroids

anybody know of a good source for toroids here in the us? i know parts express has avel-lindbergs, but that seems to be the only place i can find that sells them not in quantity.
  Reply With Quote
Old 5th January 2007, 04:04 AM   #2
diyAudio Member
 
Join Date: Oct 2004
Location: The high-five state
http://stores.ebay.com/Antek-inc_W0Q...Q3amesstQQtZkm
  Reply With Quote
Old 5th January 2007, 03:04 PM   #3
diyAudio Member
 
XEAGLEKEEPER's Avatar
 
Join Date: Jan 2006
Location: central Iowa
Antech/Par-metal has a real good selection . Allied Electronics , newark and I believe mouser handle the Hammond toroidals and the Avel's at partsexpress
__________________
Ret. USAF... AKA- Avionic *** Solder slinger for hire...***
  Reply With Quote
Old 5th January 2007, 03:58 PM   #4
CBS240 is offline CBS240  United States
diyAudio Member
 
CBS240's Avatar
 
Join Date: Aug 2005
Location: K-town
http://www.toroid.com

Here you can also get prewound/insulated primaries and wind your own secondary(s) for a particular application
__________________
All the trouble I've ever been in started out as fun......
  Reply With Quote
Old 5th January 2007, 05:02 PM   #5
Chartal is offline Chartal  Canada
diyAudio Member
 
Join Date: Nov 2004
Location: Montreal
Anyone try to wind there own toroid with Alpha-Core
They have core with pre-winding primary from 46VA (12$) to 2600VA (85$)
  Reply With Quote
Old 5th January 2007, 05:40 PM   #6
diyAudio Member
 
bikehorn's Avatar
 
Join Date: Aug 2004
Location: toronto
alright, i'm interested in the DIY winding aspect...but i have to wonder, just how do i wind a secondary? do you just wrap the magnet wire around the core by hand? that seems a little tedious and sounds like it could compromise the end result.
  Reply With Quote
Old 5th January 2007, 06:48 PM   #7
taj is offline taj
diyAudio Member
 
taj's Avatar
 
Join Date: Feb 2005
Also,

http://www.victoriamagnetics.com/

They stock 80 VCT toroidals intended for Leach Amp projects (120v Prim.), but offer anything else you need.

..Todd
  Reply With Quote
Old 5th January 2007, 07:44 PM   #8
diyAudio Member
 
HipoFutura's Avatar
 
Join Date: Jun 2006
Bought mine directly from Avel: http://www.avellindberg.com/contact.htm

Don
  Reply With Quote
Old 6th January 2007, 06:04 AM   #9
diyAudio Member
 
unclejed613's Avatar
 
Join Date: Dec 2006
actually, toroids are pretty forgiving for handwinding technique. the only place you run into trouble for sloppy windings is at higher frequencies, where you have to contend with inter-turn capacitances. you might want to dip your finished transformer in lacquer or rubber tool handle coating to reduce magnetically induced wire "buzz". all you really need to do for calculation is figure out the required turns ratio, and figure out your correct secondary wire size. you can use just about any type of wire you want for the secondary. i prefer teflon insulated when i can afford it, the insulation is thinner than PVC insulation, so you can get higher turn densities (not as high as enameled wire though), and will not cause shorted windings if A> run too hot, or B> the equipment takes a lightning hit (common here in Colorado).

i've hand wound many toroids for many different uses, and they are much easier to wind than EI core transformers (unless you have an EI core that comes apart so you can take the bobbin out). if somebody wants to build a toroid from scratch, i recommend using the toroid from a computer monitor or TV deflection yoke. they're not as compact as a commercial power toroid (they're kind of funnel shaped, instead of flat), but if you get an old dead TV or monitor, they're free...... and yes they CAN be used for 50/60hz, after all most TVs and computer monitors use 50 or 60hz vertical sweep. make sure to cover the core with some type of insulation, such as tape if you use varnished magnet wire. ferrite is a ceramic, and magnet wire enamel scrapes off easily. also isolate your primary and secondary with at least 2000V worth of insulation, if you use something like black tape, the package should tell you what the voltage rating of the tape is per layer (i don't recommend black tape because it dries out and gets brittle eventually, but i am using it as an example).
__________________
Vintage Audio and Pro-Audio repair ampz(removethis)@sohonet.net
spammer trap: spammers must die
  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
Two toroids BeerCan Swap Meet 3 9th July 2008 08:51 PM
Where to buy HT toroids ? Jan Dupont Tubes / Valves 15 23rd March 2008 01:56 PM
Toroids FS sandstorm33 Swap Meet 4 5th February 2008 04:57 PM
WTB: 43-0-43 or 46-0-46 Toroids K-amps Swap Meet 3 17th November 2006 08:03 PM
toroids MC Chip Amps 1 24th December 2003 08:31 AM


New To Site? Need Help?

All times are GMT. The time now is 01:25 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