that radio r1155/t1154 what would be the max range of that set ?
I can’t give a precise figure, but long, depending on transmission power, antenna gain, and atmospherics. Remember that in the mid-30s an Imperial Airways flight maintained radio contact with base all the way across the Atlantic. People who recall old-fashioned radio dials may recall markings such as “Luxemburg” and “Hilversum”. MF sets in the UK could receive transmissions from terrestrial (admittedly powerful) transmitters in those locations, with no special skill required by the operator. Some people my age may recall, when the Cold War was still on, staying up late and switching their radios to long wave to tune in to such jolly entertainment as Radio Tirana, or the Radio Kiev English Service.
All the best,