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Old 9th December 2012, 07:03 AM   #1
jlind54 is offline jlind54  United States
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Default DIY Toroidal Core

Was wondering if anyone had adventured into winding their own toroidal power transformer for an amp project. Looking around it appears that cores can be picked up relatively cheap compared to the cost of a manufactured transformer.
Silicon Steel Toroidal Cores - In Stock
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Old 9th December 2012, 10:33 AM   #2
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I'd like to look into this, though I understand it is very laborious to wind them. I don't mind repetitive laborious work though. Making them safe would perhaps be the paramount challenge.
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Old 9th December 2012, 10:46 AM   #3
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A bit of a learning cure ahead just to get a transformer you think on the cheap.. I mean how many of these things are you ever going to need it really dosnt seem worth the effort. would be easier safer and quicker to modifiy existing secondry windings to your needs. Good luck
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Old 9th December 2012, 12:02 PM   #4
tinitus is offline tinitus  Europe
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how about winding it like c-core or r-core instead
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Old 9th December 2012, 12:13 PM   #5
AndrewT is offline AndrewT  Scotland
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A core with a ready wound primary would save a lot of work in a step down transformer.
It would also be made in the same safe manner that a completed toroid is made.

I would not wind my own Mains Primary !

I have found a very few primary only toroids and they were all expensive !!!!
regards Andrew T.
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Old 9th December 2012, 12:36 PM   #6
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It does look like a lot of work to wind the primary on one of those - about 550 turns for 110V on the 233VA.
The heart ... first dictates the conclusion, then commands the head to provide the reasoning that will defend it. Anthony de Mello
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Old 11th December 2012, 09:13 AM   #7
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i guess andrew beat me to it i have just had a look at primary only toroids. approx twice the price as a transformer supplied with seondry windings... It would be much more cost effective to buy a ready made torroid and remove the secondry windings so you can wind your own.. have sent an email to airlink transformers i am still waiting for a reply..

Regards Mark
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Old 11th December 2012, 10:53 AM   #8
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Winding toroidals is a mess.Why not to buy second hand for cheap? I did that many times, never got any problem.
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Old 11th December 2012, 11:22 AM   #9
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Here in the forum there are some comments I did about my toroidal transformers, some of them for power supply are working pretty fine, other for audio, are wrong and I will rewind some later.
Osvaldo F. Zappacosta. Electronic Engineer UTN FRA from 2001.
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Old 11th December 2012, 11:25 AM   #10
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I agree let the people who know exactly what they are doing and are set up already do the job.. If you want to wind your own fair play .. Would it be a way to improve sound . If not i miss the point
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