Vintage style cards for the Stored Program Sound Source Model 208.
To quote the original manual: “Any patch or instrument definition available through the front panel connections and level settings may be replicated on the Model 208 Program Card. In this way the performer may instantly and accurately change entire patches in the time it takes to remove and insert a new card in the Program Card slot. Resistors of 10 different values, ranging from 120kΩ o 4.7MΩ, are used to replicate the front panel switch positions, control voltage connections, and pot settings.”
I assume no liability for personal injury or damage to equipment caused directly or indirectly by the use of these circuit boards.