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Foil wound pancake secondaries.



Original poster: Finn Hammer <f-h-at-c.dk> 

all,


At the scrap yard, I came across a nice roll of 2 thou. thick 1 inch
wide copper strip,(0.05mm*25mm) and so a nice foil wound pancake
secondary would be possible to make.
I imagine that oil impregnated paper from cash registers would do as
insulation. Even with 2thou thick insulation it is possible to make a
1000 turns coil that is only 8 inches (200mm)in diametre.
Drive it from the H.bridge and get some interesting results.

I`m not sure I understand this right, but I imagine that the turn to
turn capacitance will be much greater in a coil like this, if so, how
will it affect the performance of the coil.

Cheers, Finn Hammer