Strangely no one posted this and it's been going around the Net:
http://paillard.claude.free.fr/
The video shows some true handcrafting and elegance...just how many people in the world can say they make their own vacuum tubes. Hats down to this gentleman from France. :)
Very interesting, a great video showing the whole process, even the testing of the completed tubes.
Somewhere in the distant past, i remember two similar articles. The first, from the 1920 showed a home made diode valve based on a small car bulb. the anode was actually OUTSIDE the glas envelope.
second article, more modern involved breaking the glass and adding an additional envelope, and the use of a glue gun and vacuum pump[ Bill Beattys science pages?]
Quote from: neptune on January 11, 2008, 07:33:33 AM
Somewhere in the distant past, i remember two similar articles. The first, from the 1920 showed a home made diode valve based on a small car bulb. the anode was actually OUTSIDE the glas envelope.
second article, more modern involved breaking the glass and adding an additional envelope, and the use of a glue gun and vacuum pump[ Bill Beattys science pages?]
@neptune
no he have take from the 2 filament (2 time 21watt) lamp ON
wire as heater. the 2 Wire (unheated) as anode !.
the outside of the glass bulb he have used with an alu-foil as "grid".
he have found some mycro-amp electron flow (heater to anode) and he can use
the gris (outside) to change this current.
(amplifiieng this.
attention the 2 time 21 wat lamp have 4 wires out the glass .
(under the metal base socked !)
Pese
wow, this is probably the damn coolest thing I have seen on this site in a long time.