JB> TW> And incidently calling it a Valve is a very approprate term as that is
JB> TW> Exacticaly what a Vacuum Tube is. A "Valve"
controlling the passage of
JB> TW> Electrical current.

JB>No, that would be a "spigot". 



Not necessarialy.

ALL spigots have valves for NOT all Valves are Spigots!!  :-)
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 þ SLMR 2.1a þ This note from El Cajon California USA