[AMPS] Emission from Thoria Filaments

[KF0FX]

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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