Notes about the Yaesu FC-30 tuner connected to the FT-891 radio. I have not been able to find any information online at all about the propriatry protocol used, so I’m compiling this from my observations.
The ultimate goal of this project is to connect an Icom AH-4 tuner to Yaesu radios.
Data shown is hex. Data in [brackets] are from tuner. Data without brackets are from radio.
Seems tuning is done in three steps: