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  • C64 power supply

    Hi All,
    I have a couple of old c64's that I am keen to fire up.
    I have been told to be careful of the old power supplies as they may over voltage in their old age and cause the c64's to become smoke machines...

    Anyone know of the best solution, is it a new supply or an over voltage device. Where can I get one from?

    Cheers,
    Nick

  • #2
    I'm interested in this too..

    Comment


    • #3
      Depending on which power supply type you have, sometimes they can be repaired and sometimes not. The first thing you want to do is check if your power supply can be opened up easily. Some are glued together and the components potted in potting compound making them damn near impossibly to do anything with. If you are lucky enough to have a unit which can be opened and repaired, replacing the electrolytic caps will be the minimum you would want to do.

      Check the c64 wiki which shows the pinouts and voltages you should expect to see on the pins of the connector. If the 5v is reading around 5.2v or higher, the unit is failing and should not be connected to the c64 or you risk damaging the c64.

      Most people I know that collect these things tend to just build their own power supply to replace the original ones. The only need +5v at around 1.5A and 9v AC at around 1A. There are plenty of circuits around online for building a replacement.

      https://www.c64-wiki.com/wiki/Power_Supply_Connector

      Reproduction modules available on ebay
      Konami 054544, Konami 054986A, 64Kb NVRam Battery Eliminator , 256Kb NVRam Battery Eliminator

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      • #4
        http://dannygalaga.com/c64.html
        Danny Galaga- the man with no signature...

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        • #5
          Click image for larger version

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          Apologies to nmercury for this hijack
          any one know what this is a power supply for?

          Comment


          • #6
            Amiga 500, 600 or 1200. It looks like an original A500 powersupply.

            Comment


            • #7
              Hi, Gamedude Computers https://www.gamedude.com.au/products/c-64 have C64 accessories including over voltage protectors to use with original supplies.

              I have seen a sealed original supply with both 9VAC and 5VDC well over - voltage though so it's not always as simple as just replacing capacitors, that transformer would have to have had shorted windings to achieve that and would fail completely before too long anyway if that was the case.

              Nobody here seems to stock complete replacement supplies for the C64 which isn't surprising - although they are fairly easy to make, such items cannot be sold in Australia without undergoing an expensive approval process.

              One solution which is simple and not too expensive for diy is to use a 9V AC 1A (transformer) Plug-pack and a 5V DC 2A or 3A (switchmode) Plug-pack and connect each to the respective pins of a 7 pin Din plug. These are all available new from Jaycar or other local suppliers and already have the relevant approvals. Regards, John

              Click image for larger version  Name:	IMG_1527.JPG Views:	16 Size:	300.2 KB ID:	2219067
              Last edited by jbtech; 9 July 2021, 08:47 PM.
              more from John's Retro Workshop - www.jbtech.linkpc.net

              Comment


              • #8
                Originally posted by jbtech View Post
                Hi, Gamedude Computers https://www.gamedude.com.au/products/c-64 have C64 accessories including over voltage protectors to use with original supplies.

                I have seen a sealed original supply with both 9VAC and 5VDC well over - voltage though so it's not always as simple as just replacing capacitors, that transformer would have to have had shorted windings to achieve that and would fail completely before too long anyway if that was the case.

                Nobody here seems to stock complete replacement supplies for the C64 which isn't surprising - although they are fairly easy to make, such items cannot be sold in Australia without undergoing an expensive approval process.

                One solution which is simple and not too expensive for diy is to use a 9V AC 1A (transformer) Plug-pack and a 5V DC 2A or 3A (switchmode) Plug-pack and connect each to the respective pins of a 7 pin Din plug. These are all available new from Jaycar or other local suppliers and already have the relevant approvals. Regards, John

                Click image for larger version Name:	IMG_1527.JPG Views:	16 Size:	300.2 KB ID:	2219067
                I describe how you do that in the link above
                Danny Galaga- the man with no signature...

                Comment


                • #9
                  Originally posted by nmercury View Post
                  Hi All,
                  I have a couple of old c64's that I am keen to fire up.
                  I have been told to be careful of the old power supplies as they may over voltage in their old age and cause the c64's to become smoke machines...

                  Anyone know of the best solution, is it a new supply or an over voltage device. Where can I get one from?

                  Cheers,
                  Nick
                  Didn't BIG Trev make a special doodad to prevent old c64 PSUs letting the magic smoke out?

                  [Edit: This thread: https://www.aussiearcade.com/forum/t...4-system-saver ]
                  Live on Twitch, when I can at random times | | You can vote for what machine I play, , follow my channel and type '!vote' in chat for details | Movember:

                  Comment


                  • #10
                    I'll have to check and see what parts I've got left.
                    if I don't contact you by the weekend give me a reminder.

                    Comment

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