The Radio Receiver Card is a voltage controlled radio expansion card designed to fit into the slot of the Stored Program Sound Source Model 208, inspired by the anecdote of Don Buchla and John Cage playing the radio on a keyboard.

It can receive FM, AM, and SW radio transmissions and scan through them with voltage control. An internal ferrite antenna is used provides the AM bands, while a BNC connector is used to attach a whip antenna for the FM and shortwave bands.

The 208’s sequencer or random 1 output can be easily added to the CV signal with a three-position switch, allowing for complex control patterns.

Note: while the FM band is usually filled with stations, the AM band is much sparser and you should not expect to pick up much more than static noise from the SW bands.