Simple SE with toroid OPTs ?

hartze11 · 24th June 2010, 06:44 PM

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

whitelabrat · 25th June 2010, 12:58 AM

Plitron makes some.

hartze11 · 25th June 2010, 01:12 AM

Quote:

Originally Posted by whitelabrat

Plitron makes some.

Those appear to be the Menno Van Der Veen design. Very nice, from what I understand, but not cheap.

Steerpike · 25th June 2010, 01:39 PM

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.

Ty_Bower · 25th June 2010, 02:24 PM

Quote:

Originally Posted by Steerpike

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?

hartze11 · 25th June 2010, 03:48 PM

Quote:

Originally Posted by Ty_Bower

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.

Steerpike · 25th June 2010, 09:53 PM

Quote:

Originally Posted by Ty_Bower

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".

24th June 2010, 06:44 PM	#1
hartze11 diyAudio Member Join Date: Nov 2008 Location: Boulder, CO	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

25th June 2010, 01:39 PM	#4
Steerpike diyAudio Member Join Date: Jan 2006 Location: Johannesburg, South Africa	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. __________________ Steerpike's Toybox

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25th June 2010, 12:58 AM	#2
whitelabrat diyAudio Member Join Date: Dec 2006 Location: Maryland	Plitron makes some.

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