imsai 2

From: Eric Smith <eric_at_brouhaha.com>
Date: Tue Aug 17 17:42:59 1999

Tim wrote:
> According to what I read from the web page, there's a PC-clone switching
> power supply followed by a "boost" switching circuit to get back to
> +8 and +/- 16. That's not completely unreasonable, but it sounds a
> little bit fishy to me in the sketchiness of the details.

It sounds a *lot* fishy. For the required current, it would be more
expensive to try to use a standard PC supply with custom step-up converters
on the outputs than to simply:

1) Hack a stanard switcher

2) Build a custom switcher

3) Have one of the switcher manufacturers build a slightly customized model

I've been thinking about replacing the power supply in my IMSAI because
the transformer has shorted turns and is delaminating. I've been looking
at stuff from Vicor. Not cheap, but high quality and reliable.
Received on Tue Aug 17 1999 - 17:42:59 BST