On Fri, 2009-05-29 at 10:44 -0400, Bill Degnan wrote:
Schematic for Donner 3500 Portable Analog Computer
http://vintagecomputer.net/donner/donner_3500_schematic.pdf
This was pieced together from three scans due to paper size.
One thing that strikes me as odd is that they have a whacking great
series resistor for running the fan on 240V, instead of using the mains
transformer as an autotransformer...
Gordon