< > supply. It runs the computer, but keeps blowing a capacitor. It als < > needs an external P/S and battery. The battery is 10 sub-cells (with < > resistor - I have a schematic). A Tyco 20VDC racing transformer (the < > for the little car/track sets) will run it. < This is just a guess, but I think that the 'blown capacitor' problem is < directly related to the 'TYCO' power supply. It's output IS going to be < _very_ noisy, when compared to computer grade supplies. The peak voltag < is probably what's killing things. I would look for an 18v supply. < < Chuck Good point. the answer is simple... What is te voltage rating of the failed cap? Likely the tyco power far exceeds the required voltage. Allison