Comment Comment by dghlsakjg Handheld radios (walkie talkie) predate that by at least a decade.They probably were mostly operating around 30 mhz in the CB band or 120-150 in the Ham or aircraft bands in that era, but harmonics are a thing parent dghlsakjg 1 year ago
They probably were mostly operating around 30 mhz in the CB band or 120-150 in the Ham or aircraft bands in that era, but harmonics are a thing