There was a time when one of the perks of having a ham radio in your car (or on your belt ... So he offered the “PocketCom CB” which was billed as the “world’s smallest citizens band ...

(Citizen's Band radio) The frequency band of 40 channels for public radio transmission in the 27 MHz band. Introduced in 1945, primarily for farmers and the Coast Guard, CB radio initially ...

Somehow [hvde] wound up with a CB radio that does AM and SSB on the 11 ... which acts as a fine tuning control. With the new setup, the Arduino has to read this, also, and make small adjustments ...