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Outrun_uk · 6th May 2020, 8:18 am

Hi all,

I’ve been busy playing about with some of my old computers and was chasing my tail a bit with a C64 which turned out to be a marginal 5v from the PSU. I’ve since replaced all the bits but was thinking about building a power supply using new components.

Just a quick question - for the mains transformer I have a choice of PCB or toroidal, is there any advantage or disadvantage using one type over the other? I need 2 x 9v at 35vA or more. One tap straight to the computer and the other via bridge rectifier/smoothing and a modern switching regulator is my plan.

Also if anyone can help out with a MOS6526 CIA chip for a reasonable price (seem to be £20+ now!) please let me know.

I’ll also be building some C64 PLA replacements when the bits arrive (from China so may be a while) so if anyone is in need of one drop me a message!

Cheers,

Kev

6th May 2020, 8:18 am	#1
Outrun_uk Heptode Join Date: Aug 2009 Location: Liverpool, Merseyside, UK. Posts: 705	Commodore 64 Power Hi all, I’ve been busy playing about with some of my old computers and was chasing my tail a bit with a C64 which turned out to be a marginal 5v from the PSU. I’ve since replaced all the bits but was thinking about building a power supply using new components. Just a quick question - for the mains transformer I have a choice of PCB or toroidal, is there any advantage or disadvantage using one type over the other? I need 2 x 9v at 35vA or more. One tap straight to the computer and the other via bridge rectifier/smoothing and a modern switching regulator is my plan. Also if anyone can help out with a MOS6526 CIA chip for a reasonable price (seem to be £20+ now!) please let me know. I’ll also be building some C64 PLA replacements when the bits arrive (from China so may be a while) so if anyone is in need of one drop me a message! Cheers, Kev