[Lowfer] Re: Litz wire

[Bill Ashlock]

Jim,

I didn't realize April Fools Day was scheduled earlier this year! <G>

Bill

>For lengths of 10m or so, it is quite easy to make your own litz using
>enameled wire and a reversible hand drill - cut three lengths of wire, lay
>together in a straight line where they won't get tangled, attach one end to
>something solid and spin the other end round in the drill until you have
>several twists per inch. Repeat twice more, and then twist the 3 bundles of
>three together in the opposite direction - you now have 9 strand litz wire.
>Repeat the process with 3 x 9 strand bundles and so on, reversing the
>twisting direction each time, for 27, 81, 243, 729 strands, by which time
>you might have got bored! Try a short length first to get the idea. The
>result works just like the real thing. The first stage is a tedious process
>for very fine wire sizes as used in proper litz, but is much easier if you
>use about 0.2mm wire. This is not as good for reducing RF resistance, but I
>found it still doubled the Q of some filter coils I made for 136kHz.
>
>Cheers, Jim Moritz
>73 de M0BMU
>
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