G3XJP published his 'Pic-a-Switch' a few years ago in
Radcom. This sensed the rf frequency and used relay(s)
to select the operating band(s). Unfortunately I have
mislaid the copy in which it was published and I can't
find it on the web. The circuit was pretty simple,
with all the hard work being done in the pic.
Peter later refined the idea into the the 'Pic-a-Tune'
automatic ATU.
73 Roger
VE3ZI
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