I was doing some searches on Polyvaricons and ran into this article.

http://www.nt7s.com/index.php5?page=efhw

I thought that his schematic was interesting.

Something like this might be interesting for camping trips of Field Day. I will have
to model some wire antennas to see what the possibilities are.

Here is a link to a photo that shows the inside of his tuner:

http://www.flickr.com/photos/nt7s/2455973702/sizes/m/