[SEL] Early Switchboard Meters and Switchgear

[bill at antique-engines.com]

Wasn't it Edison who really observed the effect but didn't take or have
the time to work with it - and basically the structure of a light bulb
became the basis for the first "valve" - so called because of the one-way
flow of electrons.

Bill

> Like the damper diodes on TV picture tube deflection coils. Used to be
> vacuum tubes (valves to Peter), and I've still got a bunch of 'em. They
> make pretty good half-wave power rectifiers.
>
> John Culp
> Bristol, Tennessee, USA
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