20 Jun
2004
20 Jun
'04
3:08 p.m.
Are we really "doomed" to re-invent the
vacuum tube? ;)
My dad told me that he designed special vacuum tubes for the Soviet
Venus missions, which were special tubes made of ceramics that could
work at 500 deg C. Those spacecraft were able to last several hours
on Venus before giving up the ghost. No semiconductor can work at
500 deg C.
MS