ADDING A C64 POWER CONNECTOR TO A C128 POWER SUPPLY 3-9-2013.
ADDING A C64 POWER CONNECTOR TO A C128 POWER SUPPLY latest updates and/or corrections 3-9-2013 A C128 power supply puts out the same two voltages as a C64 supply. However, the 128 supply is more reliable and doesn't suffer the same bad reputation as the C64 "brick". It can handle higher current on the 5V line and will allow the 64 to run heavier loads such as a RAM Expansion Cart which normally comes with its own beefier power supply. Of course the C128 PS has a different type of connector which doesn't fit a C64, but with the addition of a "pigtail" cable and connector, that supply can work with a C64. You can either cut the cable off a defective C64 PS or buy a four wire cable and DIN connector to do this modification. The color coding of the wires inside each cable will be different, so the correct ones need to be identified and connected together. Below is a common color code used an both supplies. Wires must be insulated from each other to prevent shorts between wires. It's best to "stagger" the four wires so if the insulation breaks down, they still can't touch each other. View the photos to see how it's done. Note: as an alternative to "pigtailing", you can drill a hole in the PS case and wire a long cord directly to the inside of the C128 supply. You will want to add some kind of strain relief so tugging on the added cable doesn't cause eventual wire breakage and/or short circuits. C64 POWER CABLE C128 POWER CABLE BROWN +5VDC RED +5VDC BLUE - (GROUND) BLACK - (GROUND) BLACK 9VAC BROWN 9VAC BLACK 9VAC WHITE 9VAC SHIELD (GROUND BRAID) Note: If your power supply cables use different colors for their wires, make sure you make the proper connections with them! One way to identify the 9VAC source is that an ohm meter will read low resistance when measuring across that source (power off, of course). Ray Carlsen Carlsen Electronics If you spot a mistake here, please let me know. Questions and comments are always welcome. Thanks!