RE: Two layer primary

["Lau, Gary" <Gary.Lau-at-compaq-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

That's a fine idea on paper, but making a neat flat spiral out of 1/4"
tubing is enough of a challenge.  Winding two turns per layer sounds like an
invitation for frustration!!  I think I'm leaning towards gluing lexan
spacer blocks to both sides of the insulating sheet of lexan.  I agree with
the tuning inductor.

Regards, Gary Lau
Waltham, MA USA

>Original poster: "Jim Lux" <jimlux-at-jpl.nasa.gov> 
>
>why not wind it as a multi layer coil with 2 turns on each layer..   Here
is
>a sideways view of the primary with turn numbers.
>
>I'd seriously consider using an "off axis" inductor for fine tuning too.
>since the scheme below is going to make tapping a bit of a challenge
>
>
>10 9
>8 7
>5 6
>4 3
>1 2
>center of coil
>1 2
>4 3
>5 6
>8 7
>10 9