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Old January 11th 08, 12:23 AM posted to rec.radio.amateur.homebrew
ken scharf ken scharf is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 182
Default Homebrew Triode !!

wrote:
Does anybody know about vacuum pumps homebrewing??? :-)


A LONG time ago (maybe 40 years?), Scientific American carried an article
(in "The Amateur Scientist" pages) about making a vaccuum pump. (It may
have been part of or near an article about making your own laser which
was strong enough to bounce signals off the moon!)

You can get a reprint of this book from Lindsay books
www.lindsaybks.com