If I were a DIY'er...

216.158.7.57

Posted by Victor Khomenko on February 22, 2000 at 04:36:48

In Reply to: Re:may we pick your brain Victor K posted by Joseph on February 21, 2000 at 18:52:48:

***You are right ! torodial is good on Power transformers but no good for Output transformers.

I don't think that is true. There ARE some incredibly good toroidal outputs.

***Is is difficult to insert a thin paper on each layer.

I presume you are talking about air gap. The core is cut in two and the gap introduced, much like in the case of the C-core part.

***It have low leakage but high capacitance. So It high frequency still not good enought for output. It also don't have a air gap. It become not good for Single end output transformers. It will saturated due to DC current.

I believe all those issues are addressable in the toridal outputs. For example, Plitron makes toroidal outputs with high frequency going into 350kHz - so it can be done. Also, the air gap CAN be introduced if required, it is not too hard. I have not seen anyone make toroidals for the SE amps, but suspect it can be done too.

I am not a believer in the SET's in general, otherwise, based on my positive experience with other toroidal parts, I would be quite tempted to try a toroid there too. I suspect one would have to experiment with the best way to arrange the windings - there are many ways of reducing the capacitance, if that is your requirement. Look at the way high frequency coils are wound.

I hear the very same statement every day: toroidal output transformers are problem. We have been using them with great results for about six years now and they work as advertised. During the initial tests, a prototype toroidal part worked better in every respect compared to a very fine E-I model.

I realy wish more people took the plunge and seriously investigated the toroidal output transformers. Plitron makes a very nice line of the general purpose parts suitable for a DIY'er.

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Follow Ups Full Thread

Topic - Transforming buzzing:is it gonna blow!? - Scott Woebcke 20:02:31 02/19/00 (14)

Re: Transforming buzzing:is it gonna blow!? - Joejabs 04:48:05 02/20/00 (1)

Re: Transforming buzzing:is it gonna blow!? - Joseph 21:16:59 02/20/00 (0)

Re: Transforming buzzing:is it gonna blow!? - Joe Rosen 00:44:18 02/20/00 (7)

With a twist... - Victor Khomenko 06:49:26 02/20/00 (6)

Re:may we pick your brain Victor K - ben 10:40:05 02/21/00 (4)

Re:may we pick your brain Victor K - Victor Khomenko 11:52:54 02/21/00 (3)

Re:may we pick your brain Victor K - Joseph 18:52:48 02/21/00 (2)

If I were a DIY'er... - Victor Khomenko 04:36:48 02/22/00 (1)

Re: If I were a DIY'er... - Joseph 16:57:23 02/22/00 (0)

Re: With a twist... - Joseph 21:20:11 02/20/00 (0)

Probably no - perhaps the screws are loose. - Dave VH 20:26:09 02/19/00 (3)

Re: Probably no - perhaps the screws are loose. - Joseph 21:23:02 02/20/00 (0)

Dave, can you please e-mail me? Thnx (nt) - JoeII-K 23:24:38 02/19/00 (0)

Thanks BTW How's your triode search going? - Scott Woebcke 21:00:43 02/19/00 (0)

Follow Ups

If I were a DIY'er... - Victor Khomenko 04:36:48 02/22/00 (1)

Re: If I were a DIY'er... - Joseph 16:57:23 02/22/00 (0)

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