Toroid Trafo adding windings/voltage...

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Hey freaks...

I've recently moved from Korea to Canada(home) and brought a few 220v items with me...

Specifically my pc speakers which upon opening have a small E core trafo that puts out +12 and -12 from a 220v primary...

I also brought a 200 VA toriod that gives +12 and -12 from a 220v primary...
Obviously at 110 primary I'll have +/-6v ...
It's also way overkill as the original E core is prolly around 50 VA max...
The toriod will easy fit into the back of the acoustical chamber, so size isnt a concern...

Not wanting to buy a proper replacement I figured I add some turns to the secondary on the toroid..

Now, unwinding for a lower voltage is pretty easy stuff, just wondering if there is anything I should consider for adding windings....
Perhaps I should unwrap the entire secondary and rewind so that I have the same gauge throught the secondary (I have some magnet wire, not sure if the gauge is teh same)...

Any guidance, suggestions?

Thanks,
Michael

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Add a few turns on the toroid and measure what the voltage is; calculate mV per turn, and from there the number of turns for the extra 6V.

Problem with a lot of turns to add is that the wire gets hardened by the many bends.
But worth a try

Nard

A GIF is worth a thousend words   They are called Rosa, Sylvia, Tessa and Tina, You can find them https://www.linuxmint.com/

Dragon broken ? http://aplomb.nl/TechStuff/Dragon/Dragon.html for how-to-fix tips

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Thanks!...

Turned out easier than thought...
After peeling off (and saving) the wrap, I found the primary was separate and wired in series...

It's now wired parallel and the secondary is giving the required +/- 12 volts or there about...
The pc speakers are working great...

On a side note, sound quality wise, they are the best sounding speakers I've ever owned...
They sound much better than the logitech 2.1s I jsut bought for my wife's computer (cosidering taking them back)...
They were also considerbly cheaper at 35$ than the Logitech's at 45$ ...
The brand is Ashton, I bought them in Korea, made in China...

Thanks!
Michael

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You lucky man :)

A GIF is worth a thousend words   They are called Rosa, Sylvia, Tessa and Tina, You can find them https://www.linuxmint.com/

Dragon broken ? http://aplomb.nl/TechStuff/Dragon/Dragon.html for how-to-fix tips