It looks like a useful thing, and I understand that it's supposed to link the IC-7300 to the ATU-100 so that you can use the "tuner" button on the transceiver.
But the schematics for that expansion board are kind of confusing to me. Does anyone know how to wire it correctly?
73, Mat¨§j OK2MTB
Expansion Board Adapter Board For ICOM IC-7300? ATU-100? Automatic Antenna Tuner by N7DDC 7x7 https://a.aliexpress.com/_mq68kly
