Interesting. That was the way the hams did the hobby back in the old days..
did you see the mercury pump? That's what they used to get the high vacuum for the tubes.
What some manufacturers did was pump out to a certain level of vacuum, then ignite a "getter" inside the tube that combined with residual oxygen, nitrogen, etc..
pretty labor intensive, tube manufacture that is.. and lotsa energy heating the stuff in various stages.
I wonder if they guy is trying to make enough to construct an Eniac computer..
I remember reading an article in QST, prolly back in the early 60's, of a ham making his own tubes. They looked really crude, not anything like this guy. He has a remarkable set of talents and disciple to do the work that he's doing.
I picked up 2 books at a swapmeet. They came from the EIMAC company library and they were on the design and fabrication of vacuum tubes. It's amazing how much work and thought went into a technology that's so close to dead now.
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Ham
Oh, I forgot the link to the story..
http://www.arrl.org/news/stories/2008/01/07/100/?nc=1
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Belle
I'll be able to upgrade this?
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Tom Strange
that's nice Ham... if I want to talk to someone in Europe I just pick up the phone...
really... I'm thrilled that you're thrilled! good for you! (and the other Hamsters)
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Jim
Here's something for you, Ham. A French amateur that fabricates his own vacuum tubes....
http://dailymotion.alice.it/video/x3wrzo_f...mpe-triode_tech
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Ham
Interesting. That was the way the hams did the hobby back in the old days..
did you see the mercury pump? That's what they used to get the high vacuum for the tubes.
What some manufacturers did was pump out to a certain level of vacuum, then ignite a "getter" inside the tube that combined with residual oxygen, nitrogen, etc..
pretty labor intensive, tube manufacture that is.. and lotsa energy heating the stuff in various stages.
I wonder if they guy is trying to make enough to construct an Eniac computer..
about 5,000 to go..
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Jim
I remember reading an article in QST, prolly back in the early 60's, of a ham making his own tubes. They looked really crude, not anything like this guy. He has a remarkable set of talents and disciple to do the work that he's doing.
I picked up 2 books at a swapmeet. They came from the EIMAC company library and they were on the design and fabrication of vacuum tubes. It's amazing how much work and thought went into a technology that's so close to dead now.
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