In a message dated 4/30/98 2:16:52 AM Central Daylight Time, measures@vc.net
writes:
<< - - How does one determine how much tungsten carbide has been formed?:
. Tungsten is a better electrical conductor than tungsten-carbide, so
one can tell how thick the tungsten-carbide layer is by measuring the
decrease in filament current as the process takes place. >>
Ya, but if the tungsten-carbide layer is at the surface, it's cross-sectional
area must be quite small compared to the entire filament. I would think
that's a difficult measurement to make. Admittedly, Eimac's explanation was a
little high level. Who knows? I do know that the thorium tends to make the
filament less brittle and easier to handle.
BTW Rich, do you still have that Web site with your manuscripts regarding
amplifiers? I have a couple of friends here who would like copies of some of
the articles you wrote.
Thanks,
Chris, KF0FX
KF0FX@aol.com
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