JE>TW>BUT al of those have one thing in common. they release the Water outside
JE>TW>the piping system. A "Valve" keeps it "IN"
the system and Controls it.
JE>TW>EXACTICALY what the Vacuum Tube does to the Current(Electron) flow.

JE>TW>The analogy of compiring "Electron Flow" to
"Water Flow" is an excellent
JE>TW>teaching tool by the way foir the Newbee to "Radio
Electricity"(What it
JE>TW>was called when I learned it).

JE>It was called "Electronics" when I learned it in 1942!

Wel lapparently Montana Farmers spezak a different language becasue
Radio Electricity was the name of the Course I took in my Junior Year of
High School for 3 Hours per day up in Great Falls.
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 þ SLMR 2.1a þ This note from El Cajon California USA