AUTOMATIC RADIO CLOCK TUNES IN STATIONS (Dec, 1930)
Wow that looks simple…
AUTOMATIC RADIO CLOCK TUNES IN STATIONS
A radio set that operates itself has recently been perfected in New York. The control board is fitted with a clock that can be set to start or stop the instrument automatically at any hour of the day or night. The same device may be set to bring in any chosen stations by means of metal tabs inserted in the proper slots.