18 Sep
2007
18 Sep
'07
12:39 a.m.
Tony Duell wrote:
I doubt very much if thing I got up to at school would
be OK now. Like
making a crude cathode ray tube. OK, it had ot be continuously pumped
(and a rotary pumo doesn't realyl give a hard enough vacuum), but I did
get a spot that could be deflected. Learnt a lot doing things like that.
How a about now deflecting a tiny spot?. There was a atomic force microscope
somewhere web as a DIY project but I think it vanished overnight.
I think they were claming about $150 or so for the simple equipment.
-tpny
Ben alias woodelf