To get the best power transfer into an antenna ... calculate the SWR. The RF signal is also divided and sampled to measure frequency. To automate tuning, an Arduino switches a bank of capacitors ...
That box has a switch, two knobs, and a pigtail with another 1/8″ jack. If your radio takes a 1/8″ plug for an antenna, that’s where you connect it. If it doesn’t, you have a few options.
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