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Re: [jlnlabs] TESLA COIL REVISED (Litz wire)
Original poster: "RIAA/MPAA's Worst Nightmare" <mike.marcum-at-zoomtown-dot-com>
Oops I overlooked that. That's actually what I was thinking (higher
Freq=shallow skin depth, less cross-section being used). I was mainly
looking at the comparative graph near the bottom.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
Sent: Friday, January 02, 2004 10:57 PM
Subject: RE: [jlnlabs] TESLA COIL REVISED (Litz wire)
> Original poster: "Lau, Gary" <gary.lau-at-hp-dot-com>
> Re. Litz wire, NO, that's not at all what I
> measured/suggested/concluded. What I measured was that the particular
> wire that I tested had a higher AC resistance than several other
> conductor types at higher frequencies. At frequencies below 120 KHz,
> the Litz was actually the best conductor that I tested. And I concluded
> that the higher resistances at higher frequencies was due to the
> relatively coarse (#30 AWG) stranding of the particular wire that I had
> on hand. I indicated a link to a Litz wire manufacturer's site where
> strand size vs. operating frequencies are recommended. Had I had access
> to a thinner stranded wire, I have no doubt that the Litz inductor would
> have had the lowest AC resistance of all.
> Litz wire is GOOD for use in Tesla coil primaries, although the
> difficulties of tapping it are obvious. The take-home lesson from my
> experiment is that the proper strand size for the operating frequency
> must be observed.
> Gary Lau
> MA, USA
> Original poster: "RIAA/MPAA's Worst Nightmare"
> Here's a link http://users.rcn-dot-com/laushaus/tesla/primary_resistance.htm
> where several different primary inductor topologies and material
> combinations were tested for gain/dc resistance/ac resistance, but at
> TC frequencies copper litz wire is actually one of the worst things to
> for a conductor and only gets worse as the frequency rises. I have yet
> reason why since it's meant for RF apps. I wouldn't have believed it if
> didn't see it.