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Yes, Peter, thanks, good reading.

I research the DC offset and toroids subject as well. I think it is not as bad as it is portrayed. First of all it is not complicated to make toroids with gap, sure slightly more expensive. Also if do not save money and wind toroids with a large space current then DC offset will not necessary through the cores in saturation with moderate DC offset. In the super Milq I decided to stay with IE transformer for plated and toroids for filaments. The Milq filament transformer is kind of much larger then it needs to be but also Milq uses indirect heated tubes. I wonder if the IDHT heater do have a transformer with a few millisecond pre-saturated core… then so what?

BTW,  the company the you point out in your test has an interesting products:

http://www.kempelektroniks.com/PowerStation75.aspx

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