Hi Ben, all,
It's a good thought experiment, but definitely not that simple. Both the
glasswork and achieving the degree of vacuum required are way out of
reach of
most experimenters. A hard enough vacuum for a hot cathode vacuum
rectifier is
very difficult to reach and requires much more than just a good
mechanical
two stage rotary vane pump. Even the vacuum level used in making neon and
fluorescent tubes is no where good enough for making electron vacuum
tubes. And,
while it might provide some rectifying action, it would likely produce
some
low energy x-rays too.
That said, if your real goal is to learn something, then by all means go
ahead and try it. (Google "The Bell Jar" magazine for instructions on how
to
make your own high vacuum pumping systems) I'll even be glad to assist if
I can.
Even if it doesn't work the first time, you'll learn a lot in the process
and you may come up with a better idea that will.
Tony Greer
**************
In a message dated 8/31/2008 9:31:51 A.M. Central Daylight Time,
bsneath@xxxxxxxxxxxxxxxx writes:
What about building a rectifier from scratch out of a fluro tube? A 4'
long
tube should hold off a megavolt or two... It would be a fairly simple task
to remove one of the filaments and replace it with a anode plate, then
pump
it down to a hard vacuum (or abouts). Why go solid state? Although i
cant imagine what the response time on something like that would be...
just
a thought...
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