[net.micro.mac] mac+ and voltage

phil@sivax.UUCP (07/30/86)

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What is the real story on power supplies and the MAC+.  We all know Apple
says the power usage on the Mac and Mac+ is the same because of some
CMOS chips used in the Mac+, but does anyone know the real story???

Also, when setting the +5 volts on the Mac, should it be set to 4.85 or 4.9?

I was having problems with the external drive being plugged in with a Micah
AT-20 internal drive connected, check the +5, found it at 4.6, so I set it to
4.9, now my system will not work UNLESS the external drive is connected.  It
is weird that adding power comsumption to a powere supply would change voltages
so much.

Any ideas?

Phil Hunt
..ucbvax!calma!sivax

briand@tekig4.UUCP (Brian Diehm) (08/01/86)

>It is weird that adding power comsumption to a power supply would change
>voltages so much.

Not so weird.  Just shabby engineering and poor regulation.  Just proves that
computers have now become "consumer electronics!"

-Brian Diehm
Tektronix, Inc.