Simple SE with toroid OPTs ? - diyAudio
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Old 24th June 2010, 06:44 PM   #1
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Default Simple SE with toroid OPTs ?

Just curious, is anyone using (or has looked at) toroid OPTs for a Simple SE (probably running EL34s)?

I see a few out there, the best (and therefore most expensive) seem to be the VanDerVeens...

Anyone know of other manufacturers?

Thanks,

Dave
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Old 25th June 2010, 12:58 AM   #2
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Plitron makes some.
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Old 25th June 2010, 01:12 AM   #3
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Originally Posted by whitelabrat View Post
Plitron makes some.
Those appear to be the Menno Van Der Veen design. Very nice, from what I understand, but not cheap.
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Old 25th June 2010, 01:39 PM   #4
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I would have thought conventional structured torroids would be a bad idea. SE transformers generally have an air gap to mitigate the effect of the unbalanced primary DC. Putting an air-gap in a steel strip toroid is not possible, so other special arrangements would have to be incorporated.
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Old 25th June 2010, 02:24 PM   #5
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Quote:
Originally Posted by Steerpike View Post
SE transformers generally have an air gap to mitigate the effect of the unbalanced primary DC. Putting an air-gap in a steel strip toroid is not possible...
It is possible to put an air gap in a toroid core.

diytube.com :: View topic - Antek's new trannys?
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Old 25th June 2010, 03:48 PM   #6
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Quote:
Originally Posted by Ty_Bower View Post
It is possible to put an air gap in a toroid core.

diytube.com :: View topic - Antek's new trannys?
Interesting thread....

Antek only has push-pull toroids on their web site.
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Old 25th June 2010, 09:53 PM   #7
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Quote:
Originally Posted by Ty_Bower View Post
It is possible to put an air gap in a toroid core.
diytube.com :: View topic - Antek's new trannys?
A matter of dialects maybe, but I would not be calling that a toroidal transformer: to me that is a "C-core".
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