From what I have read your Ant. is one of the best reduced length Ant. out there. I would not want to take anything away from your design. I (we) were just looking for options. The last ant. i bought ($10) came apart when I was striping a plane (Not Your Ant.) so I got to thinking about what it would take to make a reduced length Ant. that could be disposable.

I used to have a few books on Ant. design way back when (CB DAYS) but have long since misplaced them. So I started looking on the net for info (found almost none) So the next best thing being a hobbist is to experiment and see what we could do.

Tuneing a reciving Ant. is not as critical as a xmiter antena because you do not have reflected power so nothing to burn up. But getting the inductance correct and getting a electrical 1/4 or 1/2 wave is much harder than it looks.

You can not just take a 1/2 wave length of wire and wrap it around a arbitrary sized core. (Soda Straw) inductance will change the electical length of your wire and it may need to be longer or shorter than the wave length that you are building for.

So the idea was to stir some intrest to see if we could maybe come up with a working reduced size Ant. but more importantly a formula or two to aid in the design.