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Old 30th August 2007, 08:58 PM   #1
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Default Sources for custom wound toroids

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?
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Old 31st August 2007, 11:32 PM   #2
radtech is offline radtech  United States
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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.
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Old 31st August 2007, 11:45 PM   #3
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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.
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Old 1st September 2007, 01:24 AM   #4
star882 is offline star882  United States
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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
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Old 1st September 2007, 02:49 AM   #5
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Quote:
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.
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Old 4th September 2007, 12:19 AM   #6
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thanks everyone! I'm going to look around locally first and see what I can find.
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Old 4th September 2007, 12:34 AM   #7
BWRX is offline BWRX  United States
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Default Re: Sources for custom wound toroids

Quote:
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.

Quote:
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!
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Old 4th September 2007, 01:13 AM   #8
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Default Re: Re: Sources for custom wound toroids

Quote:
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...

Quote:
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?
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Old 6th September 2007, 05:15 AM   #9
dangus is offline dangus  Canada
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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.
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Old 11th September 2007, 02:39 PM   #10
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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.
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