A few months ago I did some experiments with variable dielectric loading
on a 100 MHz dipole, but I just recently got around to putting the
results in a YouTube video. The idea was to be able to tune an antenna
without having to physically trim the elements. It's a bit long and
clumsy, but I think parts of it might be of interest to some folks.
https://youtu.be/YJTJcWPkVdA
Dave AB7E
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