Commodore 64 Power Supply

Jim Brain brain at
Tue Jul 1 13:00:37 CDT 2008

Jules Richardson wrote:
> gordonjcp at wrote:
>> On Mon, Jun 30, 2008 at 02:24:16AM +0100, Tony Duell wrote:
>>> Making a switching supply to give a 50Hz or 60Hz AC output would be 
>>> decidedly non-trivial (and IMHO not senisble here). The obvious way to 
>> And yet I've got a couple of C64 power supplies that are most definitely
>> switchers.  *Someone* did it, but since they're currently 220 miles away
>> it's a bit hard to read the label.
> Were those custom jobs, or off-the-shelf supplies (that someone 
> stuffed into a box)? I don't think I've seen an off-the-shelf switcher 
> with a 9VAC output* before, but Farnell, Plessey, Astec and Weir crop 
> up all over the place in UK equipment...
> * I don't think, anyway. Some of them do seem to have an 'aux'-type 
> output that the user can tweak to their own spec, though.
Late in the game, CBM switched (no pun intended) to switchers.  I have a 
C128 PSU that is a switcher.  They were mounted in the same case, but 
you can tell by the weight.


Jim Brain, Brain Innovations                                      (X)
brain at 
Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times! 

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