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  1. J

    Schematic of the older EXPO KIT Expander boards

    I remember back in the 90s i copied a couple of the Expo Expander kits with a couple Xtals and variable caps and transistors on a perf board with a DPDT toggle switch, Does anyone have a solder side view or maybe a schematic for these? im coming up with nothing in my attempts, Thank you 73