Seventy five years ago this month, the April 1944 issue of Popular Mechanics showed how to make this portable phonograph, to easily bring recorded music to a friend’s house.  Since the friend presumably already owned a radio, then it was a simple matter of plugging this set into the phono input of the friend’s radio.

And if there was no phono input, then you would screw in two 60 watt light bulbs (which served as the dropping resistor for the filaments) which would bring to life the two-tube oscillator contained in the phono.  The music would be heard near the top of the radio dial.