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Several questions about transformer



Hi!

1. What is the best material to make isolation between layers in 
   secondary coil ?

2. What should be the wire diameter to make 150 mA secondary ?

3. What is "mil"? I found that foil thickness is measured in this
   individuals of measure. (What is dependence : mil to millimetre ?) 

4. What's the best way to connect copper wire to aluminium foil
   in rolled capacitor?

5. How can I count the best toroid capacitance for 1800W coil.


Thanks for all answers .


Kamil Kompa
czlonek-at-polbox-dot-com