Re: plus4 power supply

From: Gerrit Heitsch <>
Date: Thu, 20 Sep 2012 17:37:26 +0200
Message-ID: <>
On 09/20/2012 02:31 PM, Julian Perry wrote:
> Hello Hegedūs,
> Thursday, September 20, 2012, 9:39:20 PM, you wrote:
> When replacing my C64 power supply innards with a regulated switchmode
> version, I noted a voltage drop of 0.2V across the power lead into the
> C64 under load - so the PSU needed to output 5.2V, to have 5V
> available at the C64. (I adjusted it by measuring the voltage of the
> 5V rail on the PCB, with the C64 operating).

Which one did you use? has a perfect fit for the old C64 
and Plus/4 supplies for less than 5 Euros: Astrodyne OFM-0101 (5V,2A). 
Order nr. is 350 765. If you clean out the empty space in the PSU 
completly, the PCB fits perfectly.

It's also adjustable, so you can have the 5.2V if you need them.

Can be done with most PSUs, but some have too much resin in them and you 
can't reach the 230V contact on the transformer. For those your only 
choice is the little regulator from ebay.

Again: You need to work on 230V for this, don't, unless you know what 
you're doing.


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Received on 2012-09-20 16:00:38

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