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The excellent post, morricab! There is secondary point in your post - the core saturation is not the fundamental problem of SETs but it is become an issue when we go for power.  If you do not need to drive 92dB sensitive bass drivers with a 6W SET and the core saturation might not become the subject.

What is important in this thread is that Devid Berning promotes his topology as something that offsets the imperfection of the transformers and particularly the core saturation problems. However, as we clearly see the core saturations are a problem only if the designer is Morons. Yes the truly HF capable transformer for high current as with high inductance to keep the saturations of the back is very difficult and costly to make and here is where the DSET topology save everything and has virtually no limitations.  So, I frankly speaking do not take Devid Berning’s pitching about the harm of transforms seriously, in fact I feel he fools himself in it. The Berning’s solution is a perfectly reasonable stand-alone solution – it is good or bad solution - it still does not illustrate anything about the subject of SETs and output transformers.

So, what is better: Berning’s DC transformers circuits or the classic gaped AC transformers? Who knows! It would be interesting to put together a properly made SET against the Berning amps use the same diver and the same output tubes. Still, it would likely portray the specific implementation then the advantage of disadvantage of a given topology…. Listening the stand along Berning would do as well….

If to place bids then I would bid on the classic SETs as I feel that it would have way less convoluted and less intricate conversios. Still, my bid worth as much my Daw predation for a new day…

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