JP> BA> Because the British have always referred to vacuum tubes as 'valves.'
JP> BA> AFAIK nobody else on the planet does.

JP>        One francophone VE2-NIC in Quebec does too.

And incidently calling it a Valve is a very approprate term as that is
Exacticaly what a Vacuum Tube is. A "Valve" controlling the passage of
Electrical current.
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 þ SLMR 2.1a þ This note from El Cajon California USA