Subj : H-P DeskJet 639C
To   : ROY J. TELLASON
From : WAYNE CHIRNSIDE
Date : Sun Aug 14 2005 12:20 pm

-> JAY EMRIE wrote in a message to THURSTON ACKERMAN:

-> TA>It may not help much Roy, but you are not alone in your frustration
-> TA>(remember all the stuying we did about vacuum tube technology, only
-> TA>to having to start all over again when semi-conductor technology
-> TA>made the it obsolete ?-(

-> JE> And now integrated circuitry and micro chips have even made
-> JE> semi-conductors (transistors, diodes, etc.) almost obsolete!  :-( 

-> Not really.

Are you aware tubes have made a comeback in a limited fashion?
Microminiaturized tubes with very sharp cathodes emmit eklectrons
without a heater element.
Uses mainly military as they're more resistant to EMP
and satellites which may be in orbits exposing them to high radiation.

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