hi Used to transmit music myself back in the 70’s used a local oscillator 6BE6 stuck an antenna on the plate pin 5 (through a .05 uf capacitor ) modulated it through pin 7 .back then used a crystal mike and phono cartridge .it was a hot chassis so had to be carefull about inputs . got a half a block with it . . quality is better than commercial a.m. broadcasting (5 khz bandwidth -typical ) not that mine was 20-20 khz but sounded better then.
that brought back back memories.