3 Oct
2011
3 Oct
'11
10:17 a.m.
On 3 Oct 2011 at 8:25, Al Kossow wrote:
How far away was the monitor?
I could believe the monitor was interfering with the read preamp.
That was very common on old designs; put a monitor on top of a box
containing disk drives and the read signal gets all screwed up. Some
steel shielding around the drives usually clears that problem up
(easier to do it to the drives than the monitor).
AC operated fans, printer stepper motors, etc. can have a similar
effect if close enough. And vice-versa--an impact printer placed
close to a monitor can cause the image to wobble quite a bit.
And then there's the Coleco Adam...
--Chuck