Maybe you'll find some useful information in this article:
"design a toroidal tank circuit for your vacuum tube amplifier"
It's in Ham Radio Magazine August 1985.
Perhaps the information is old and outdated - I'm no expert. But I found it
useful when I built my 160 meter coil.
73'
SM0NOR / Ulf
Sent from my new iPad
On 28 mar 2012, at 15:28, David Feldman <wb0gaz@yahoo.com> wrote:
>
> Thanks for the many replies to the thread.
>
> Here's my take-away -
>
> 1. Single toroid per band.
> 2. 160 and 80M are OK, 40M is iffy, 20M and above is not a good idea.
> 3. Insulating procedure necessary
> 4. Core size and mix are important considerations.
>
> Thanks all, this gives me exactly what I was looking for.
>
> Stay tuned for my next question...
>
> 73 Dave WB0GAZ wb0gaz@yahoo.com
>
>
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