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PC board primaries

To: tesla-at-pupman-dot-com
Subject: PC board primaries
From: "Tesla list" <tesla-at-pupman-dot-com>
Date: Fri, 07 Dec 2001 20:32:46 -0700
Resent-Date: Fri, 7 Dec 2001 20:43:31 -0700
Resent-From: tesla-at-pupman-dot-com
Resent-Message-ID: <YK_qq.A.cnC.hxYE8-at-poodle>
Resent-Sender: tesla-request-at-pupman-dot-com

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

Has anyone ever tried making a flat primary by etching a piece of copper
clad board?  With suitable copper thickness, the AC resistance might not be
all that bad (skin effect, and all).  Say you etched  a 1/2" wide spiral
trace... 2 oz copper is 0.007112 cm  Skin depth at 300 kHz in copper is
around 0.01 cm..  Double sided board, with the spiral on both sides, might
have a decent cross sectional area.

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