Sources for custom wound toroids

[luvdunhill]

I was wondering if you guys might have a good recommendation for a company that does custom-wound toroids for power supply use. I have gotten a quote from Plitron, and it was out of my price range. The only other place that has come recommended to me is Victoria Magnetics... any other places I should check?

[radtech]

Quite a few years back I got a catalog from Toroid Corporation of Maryland that did custom transformers.. their website is www.toroid.com (imagine that). The copyright at the bottom of the site says 2004, hopefully they're still around, worth checking out anyway.

[Brett]

Yellow Pages. Lots of places will make non standard power transformers provided you don't want something too 'odd' to them and usually not at too much additional cost. Make some calls.

[star882]

DIY? Just buy the core and some wire. So easy that even a 2-year-old can do it.
http://www.hanssummers.com/radio/toroid/index.htm

[Brett]

Originally posted by star882
DIY? Just buy the core and some wire. So easy that even a 2-year-old can do it.
http://www.hanssummers.com/radio/toroid/index.htm

LOL. I think there's a few more turns on most power trans.

[luvdunhill]

thanks everyone! I'm going to look around locally first and see what I can find.

[BWRX]

Originally posted by luvdunhill
I was wondering if you guys might have a good recommendation for a company that does custom-wound toroids for power supply use. I have gotten a quote from Plitron, and it was out of my price range. The only other place that has come recommended to me is Victoria Magnetics... any other places I should check?

What sort of custom specs are you talking about? After getting in on the Plitron group buy you know full well that it would be cheaper to use a standard offering!

Other manufacturers in the US include:
Avel Lindberg http://www.avellindberg.com
Bicron Electronics http://www.bicronusa.com/toroidal.html
Torelco http://www.torelco.com/products.html
Tranex http://www.tranexinc.com/transformers.htm
Beverly Manufacturing http://www.beverlymfginc.com/products.htm
etc.

Originally posted by star882
So easy that even a 2-year-old can do it.

She even used a secret winding technique to minimize interwinding capacitances. Amazing!

[Cloth Ears]

Originally posted by star882
DIY? Just buy the core and some wire. So easy that even a 2-year-old can do it.
http://www.hanssummers.com/radio/toroid/index.htm

If you don't include a thermal fuse in your power transformer, then you might find your lovely house burnt to the ground (if you're in the habit of leaving your amplifiers on). Not having one is illegal in this country. See Rod Elliot's Transformer Article. For the little chokes, no problem...

Originally posted by BWRX
What sort of custom specs are you talking about? After getting in on the Plitron group buy you know full well that it would be cheaper to use a standard offering!

luvdunhill, most of the standard Antrim range over here would cover anything that I'm looking for, and I'm assuming Plitron would be the same where you are. What, specifically, are you looking for that doesn't come in the standard range?

[dangus]

If you're in a larger city, there's probably some local outfit that makes transformers. In Vancouver BC, that would have been Best Coil (who are now out in the wilds of Surrey). It's slightly possible they may have some seconds or unclaimed transformers you could get cheap and modify or use as cores.

[luvdunhill]

hi, sorry for the slow reply.. thanks for all the help! My requirements are 2 x 330VAC/150mA at a minimum and possibly some extra filament supplies, i.e. 2 x 6.3V/5A.