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RE: Small coil questions?



Original poster: "Lau, Gary" <gary.lau-at-hp-dot-com> 

Litz wire may be (at least in theory) very good for a primary, but it's
important that the individual strands be sufficiently thin for the
operating frequency.  See
http://www.coonerwire-dot-com/Products/Litz/DesignD_2.html.

The down-side of a Litz primary is that it's very difficult to tap,
although one could wind the inner 70% of a coil with Litz, and use
copper tubing for the outermost turns where it would be tapped.

Also, be certain that the wire you are talking about is indeed Litz
wire.  True Litz wire has individually insulated strands, so each strand
is insulated from the other strands.  Ordinary stranded wire is a very
poor choice for a primary and performs very differently than Litz wire.
See my testing of this at
http://www.laushaus-dot-com/tesla/primary_resistance.htm.

Regards, Gary Lau
MA, USA


Original poster: "Kreso" <kreso.bukvic-at-kc.htnet.hr>

can i use for primary wire that is made from many tiny wires? Litzn wire
or
similiar?