S-100 power supply voltage ranges

[Allison]

>
>Subject: S-100 power supply voltage ranges
>   From: "Andrew Lynch" <lynchaj at yahoo.com>
>   Date: Sat, 28 Feb 2009 10:03:10 -0500
>     To: <cctalk at classiccmp.org>
>
>Hi!  What are acceptable voltage supply ranges for an S-100 power supply?  I
>am assuming 115VAC input.  My intended application is a small home brew
>S-100 backplane.
>
>I have seen the S-100 voltage rails vary but I believe +15VDC, -15VDC, and
>+9VDC would be sufficient.  Herb's S-100 page lists the voltages as +18VDC,
>-16VDC, and +8VDC but I have seen other voltages used.
>
>Thanks and have a nice day!
>
>Andrew Lynch

The minimim voltages are +8, +15 and -15 or otherwise said at least 3V greater 
than the on card regulator.

The maximum is generally +10, +18, -18v the caveat here is while most of the 
regulators used will accept up to 25-30V excessive voltages leads to overheating
especially on the +8 buss where the highest current users are.

Ideally well filterd voltages at the minimum on the +8V, +15V busses are desired
and there were a few S100 boxes that did exactly that.

Allison