RE: C64 power supply replacement

From: Baltissen, GJPAA (Ruud) (
Date: 2004-01-16 08:26:40

Hallo Mario, Dave,

> The primary reason for separate windings, as far as I know,
> is to get isolation between the +5 ground and the 9vac. 

That's what I thought as well 15 years ago. Then I blow up the diodebridge
and the fuse. I noticed that this 9V AC is rectified as well, inside the
C64. This means there is no galvanic isolation and thus no free use of the
9V AC.

FYI: I wanted to generate a simple +9V and -9V by connecting one pin to GND
and using two diodes connected to the other pin for generating these
voltages. This simply meant that at one phase the diode shortcircuited the

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