> My ground plane is entirely on the bottom of the board, not the top

David, AIUI a ground plane under a PCB trace will short it out at
RF frequencies (what a purposely-used ground plane is meant to do)
=20
> A PCB antenna or something like this would be great, but if it gets
> too confusing I might resort to a piece of wire!

I'd be very surpised if you can't get a reliable link to 20m with just
about anything - depending on transmission power of course - even
an 1/8 wave wire (85mm)

Joe
--=20
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