[AMPS] Cathode Lifetimes

[Pat Barthelow]

What is the expected hour lifetime of a typical thoriated tungsten
filament tube like the 3-500Z?  Assuming no operator
abuse/mistakes/parasitics, etc, is
there a mechanism for the tube going flat (showing reduced output) simply
from old age/use?  If there is an operational old age for cathode
emission, does the clock tick if the tube is lit, but no current flows?


73, DX, de 
Pat, AA6EG/N6IJ; 
aa6eg@hh.tmx.com;n6ij@hotmail.com
599 DX Drive, Marina CA 93933
See us on the web: www.polkinghorn.org/n6ij
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