6 Jun
2009
6 Jun
'09
5:30 p.m.
Long ago, I bought a Heathkit color television -- it
was gorgeous.
Needed some work. Also, while I was contemplating buying it, the owner
offered to throw in a 'scope, too. It had never worked he said. The
screen was "grainy" and a new tube cost too much. I accepted. The
television was easy to fix (Heathkit, I said).
But, when I fired up the 'scope, I was shocked. He was right. The
scope image could be focused, but it never got clear. It looked like
the phosphor was painted on the tube with a roller. Then, I had to
laugh....
I took off the bezel, pulled off the graticule screen, and peeled the
tyvek sticky paper off the back of the plastic screen, and voila! A
nice clear trace.
ROFL!!
I wodnered why complex electronic instruments came with such losing
manuals, after all, surely the sort of person to buy a 'scope or logic
analuyser has more than 2 working braincells. Now I know...
-tony