Please read this whole blog post describing this project before purchasing....

https://bsgelectronics.com/williams-stereo-adapter


This is a listing for a blank PCB that can be used for adding a second sound card to Sinistar Upright, Stargate, or Joust and enable stereo.   

This sale is for the blank PCB only and additional parts will need to be purchased on Digikey, ebay, or others.  

Requires a 2532 EPROM programmed with the appropriate stereo bin file for your game. Assembly requires soldering.

Please feel free to message me with any questions about this PCB or project.