Commodore 64 Power Supply

On Sunday 29 June 2008 20:08, Ray Arachelian wrote: No. The 9VAC has to be a separate transformer winding from the one that provides the +5VDC eventually, because of how it's used... One thought that came to me after my previous response was posted is that if one happens to have a really trashed 1541, that transformer could be used, as well. In fact, I built a bench supply that worked that way, though my attempts to try and run two 64s off it at the same time never worked, even though I had separate regulators for the two outputs. Too much interfence between the two. Any time I'd hook two computers up and turn 'em both on the output voltage on both would drop way down, and my scope showed me some seriously bad oscillations going on. I suppose these days I know a bit more about how to treat those 3-terminal regulators, but I've never bothered to modify the thing... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin