Re: PC board primaries

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

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

I shouldn't think that heating will be all that big a deal.. After all, how
much does the copper tubing (or AWG 14 wire) primary heat up...not at all.

Oil is a mess.. Conformal coating is the way to go..
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, December 08, 2001 10:12 AM
Subject: Re: PC board primaries


> 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.
> >
> >
> >
>
>
>