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Re: 3/4 wavelength secondaries



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> An obvious 
>answer is to use a flat spiral secondary, as I believe Tesla envisioned, 
>to raise the Lp to the highest value, but I can't figure out how to build 
>it.

>Oh well, tomorrow is another day

The only way that I could see to build this is to make a bobbin that is just
over
the wire diameter high - 2 large flat steel plates lined with plastic sheet,
with a
suitable spacer in the middle, fix wire 
in centre and wind. Remove top, (it might go ping) slide off the top varnish
as you go, remove bottom. 

Just an idea

Alan