24 Aug
2012
24 Aug
'12
10:38 p.m.
On 24 Aug 2012 at 17:55, allison wrote:
The power supply was crap. With the 5 boards I
had it was barely
able to power them (8V line was actually
7.8V with excess ripple). the fix for that was NOT free from MITS
Yup, you could see the ripple in the front panel LEDs if you looked
carefully. Two things high on my list were the awful 4K DRAM boards
and the cheap white wire for connecting the CPU board to the front
panel. It'd break if you looked at it. Why not ribbon cable is one
of those things that remain a mystery. Those power switch traces on
the front panel stung me one too many times. I installed a rear-
panel switch and probably saved my life.
I haven't powered mine up in over 30 years. I suspect that the PSU
caps are empty shells by now.
--Chuck