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>

Of course, for PC boards using photolithographic techniques (the usual
approach), arbitrary complexity isn't a problem.

If cutting with an xacto knive and Dremel, though...

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, December 10, 2001 7:09 AM
Subject: Re: PC board primaries


> Original poster: "Barton B. Anderson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>
>
> Hi All -
>
> An idea (not sure if it's been thought of - I haven't paid close
attention).
>
> For a double-sided pc board, the top and bottom trace can be slightly
> overlapped. This would make it possible to simply etch/cut simple
circlular
> traces (a gap must be cut between each circle to prevent a shorted turn).
A
> feed through between upper and lower circle traces can link each turn.
>
> Something like this: You have to use your imagination a little.
>
> 1     3     5     7     9
> ----  ----  ----  ----  ----
>    |  |  |  |  |  |  |  |
>    ----  ----  ----  ----
>    2     4     6     8
>
> Space saving as well considering this approach:
> 1     2     3     4     5     6     7     8     9
> ----  ----  ----  ----  ----  ----  ----  ----  ----
>
> Anyway, I was just thinking about the ease of simple circles instead of a
> continuously growing traces.
> --
> Barton B. Anderson
> <http://www.classictesla-dot-com>http://www.classictesla-dot-com
>
> Tesla list wrote:
> >
> > Original poster: "Pete Komen by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <pkomen-at-zianet-dot-com>
> >
> > What I see as a problem is that the flat trace on a flat board makes for
a
> > physically large primary and a lower inductance than other arrangements.
A
> > flat strip of copper on edge and coiled in the normal fashion for a flat
> > spiral primary would have greater inductance and smaller size (and a
would
> > likely have corona on the small radius edges).  Several layers stacked
could
> > fix low inductance and size problems.
> >
> > On the other hand, for a small coil at low power it could make a nice
> > looking primary.
> >
> > I would like to hear results if you try it.
> >
> > Regards,
> >
> > Pete Komen
>
>
>
>