How do you keep the varicap from causing all manner
of IMD, some of it pretty exotic? Don't forget that the tuning
voltage is "modulated" by the signal voltages in the tuned
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On 20201206 02:19:50, Allan Isaacs
Try a varicap and
a ferrite rod.
A lot easier to
handle and you do not need
a ladder to adjust it when on top of a pole.
I made a video for folks who want to build a n air
core loop but are not sure
about the dimensions needed for a particular
frequencies of interest.
This video show how build a reusable form air core
loop and answers a lot of
question folks have been asking.