S-100 power supply voltage ranges

[Dave McGuire]

On Feb 28, 2009, at 10:03 AM, Andrew Lynch wrote:
> 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.

   Every S-100 chassis I've seen has +/- 16VDC and +8VDC power  
supplies, and most of them are unregulated due to distributed  
regulation (7805s, 7812/7912 if needed) on each board.

            -Dave

-- 
Dave McGuire
Port Charlotte, FL