PS-28S Rev-1
The PS-28S Rev-1is a switch-mode power supply designed to be a replacement for the PS-28U and its predecessors.
The PS-28S comes with the necessary hardware to mount to a universal IMSAI 8080 base plate (most systems produced),
or the original mounting hardware may be used.
The wiring connections to the output voltages are in the same place as the PS-28.
The board length is slightly shorter than the PS-28 to accommodate the newer cabinet back frame with power entry modules.
The PS-28S can be supplied with any AC mains voltage from 100 to 240 volts, 50Hz or 60Hz, single phase.
The PS-28S can deliver more power with less voltage variation than the PS-28U. It runs cooler.
It is lighter and poses less of a structural risk to the system should it suffer a kinetic event.
Since most modern cabinet configurations include a DC fan, a dedicated +12VDC fan connector is provided.
Complete Kit
Order one from the list below. The kits are complete with everything you need except solder and tools unless otherwise stated.
They even come with a nice printed user manual. Be sure to hover over any
icons for more information.
Most builders won’t need anything else besides one of the above complete kits.
To skip over the options go to More Information to get links to useful resources.
If you're an advanced builder and want to see all the options, read on.
Bare Board
You may order a bare printed circuit board for you to use your own parts.
Be advised that individual parts are not available to bare board customers unless they are explicitly in the parts list below.
IMSAI Parts
Links
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