29 Jan
2009
29 Jan
'09
8:11 a.m.
But, yeah, I guess I'll try setting the timer for
longer now, to ensure they're good and blank. I
was always told that too much UV would damage the chips - I've never left one in for
more than say,
15 minutes before. Next time I need to erase some, I'll put 'em in for longer
than three or five
minutes...
Which is why a timer is a good thing ... I can tell you from personal experience
that forgetting a tray of EPROMs in an untimed eraser overnight leads to non-
functional devices. The ones I left in for an hour seemed to be OK, but I wouldn't
do that on a regular basis - after about the third time I left the tray in
overnight, I ripped the timer out of a dryer we were disposing of and made it an
integral part of my eraser.
Dave
PS: Since you don't know the charactistics of your lamp, I'd err on the cautious
side ...
--
dave09 (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.classiccmp.org/dunfield/index.html