scream-of-consciousness;
"If you're trying to change minds and influence people it's probably not a good idea to say that virtually all elected Democrats are liars, but what the hell."
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Thursday, January 10, 2008
You never asked before
I know what you're saying ...
But, Rodge, how come you've never shown us how to make vacuum tubes?
Ozaob (Boazo in disguise so SondraK doesn't get mad at him for contributing here)
I'm actually old enough to have done this with kits in freshman physics class. One thing that he doesn't show so well is the final flash. After you've sucked down the tube and sealed it off, you run a large current between two of the electrodes such as the cathode and the filament that have been temporarily connected by s short piece of aluminum wire. The wire goes poof and consumes the remainder of the oxygen in the tube and is responsible for the silvery coating on the glass of many tubes.
In graduate school I made small ICs, but that's another story. By then we were laughing about vacuum tubes calling the high voltage FETs with an all weather glass encapsulation.
Very impressive. I'm a former ham myself and a machinist, and I have a pretty good idea of how much time and effort he put into the tools he made to do that work. It's an odd hobby, but there are odder ones. One day there will be guys like him working in living history museums, kind of like going to Williamsburg to see how they made candles.
I'm actually old enough to have done this with kits in freshman physics class. One thing that he doesn't show so well is the final flash. After you've sucked down the tube and sealed it off, you run a large current between two of the electrodes such as the cathode and the filament that have been temporarily connected by s short piece of aluminum wire. The wire goes poof and consumes the remainder of the oxygen in the tube and is responsible for the silvery coating on the glass of many tubes.
ReplyDeleteIn graduate school I made small ICs, but that's another story. By then we were laughing about vacuum tubes calling the high voltage FETs with an all weather glass encapsulation.
JLW III
"all weather glass encapsulation."
ReplyDeleteLMAO.
Huh?
Amazing!
ReplyDeleteMile66
Not "solid state", "hollow state".
ReplyDeleteMC
Cool ...
ReplyDeleteI thought that was fantastic!
ReplyDeleteBoazo
Very impressive. I'm a former ham myself and a machinist, and I have a pretty good idea of how much time and effort he put into the tools he made to do that work. It's an odd hobby, but there are odder ones. One day there will be guys like him
ReplyDeleteworking in living history museums, kind of like going to Williamsburg to see how they made candles.