Re: Power Supply Voltages
Michael A. Covington wrote:
>> 5v 4.78
>> 12v 12.48
>> Are these close enough to run on, or am I looking for trouble. Should I
>> send it back?
> The latter two look almost out of specification, but before drawing a
> conclusion, read them with a real voltmeter (red-to-black and
> yellow-to-black respectively on a disk drive connector while the machine is
> As I recall, the tolerance is 5%, meaning 4.75 is the minimum for the 5-volt
> supply and 12.60 is the max. for the 12-volt supply.
In the 70s we had some disk drives that required lower voltages to have
much tighter tolerances, so I was more concerned with that 3.25 for the
I'll get my voltmeter on the 5 & 12, as you suggested