> The primary (230V) has a very high DC resistance, 24k

so it isn't very optimal for your purpose. find (or make!) a ferrite
trafo that is approximately 1:1.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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