Re: PC board primaries

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jason Petrou by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jasonp-at-btinternet-dot-com>

Jim,

If you immersed it in oil to keep it cool and to stop surface tracing it
might make a really good primary for a small coil!!!

Best R,
Jason
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, December 08, 2001 3:32 AM
Subject: PC board primaries


> 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.
>
>
>