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echo: ham_tech
to: HOLGER GRANHOLM
from: IVY IVERSON
date: 1997-12-26 09:37:00
subject: Valves

-=> On 12-24-97  18:54, Holger Granholm said to Jeff Edmonson,<=-
-=>"About Hammarlund HQ-170C:RESTOR...,"<=-
 
Hi, Holger;
 
 JE-> > In all other countries the american influence has
 JE-> > "made them" tubes.
 JE->American influence or not, "VALVE" is a better description for big
 JE->glass vacuum bottles, with filaments.
 
 HG> Hmm, in my opinion valve is something that can be opened or closed.
 
A vacuum tube CAN be "opened and closed" in the sense that the electron
flow can be controled from cut-off to "wide open" and anywhere in
between.  (Ok, a transistor can do it too, but it uses different physics).
 
OH0NC DE KB9QPM  73 ES HAPPY NEW YEAR
   Ivy
 
 
 
... Happiness is a warm valve......!!!   ;-}
 
    --
 
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