answersLogoWhite

0

Known as `tubes' in America. Valves were glass containers where electrodes where encased in a vacuum. E.g. a diode valve would have two electrodes, an anode and a cathode there would also be two pins for the heater. The heater would `boil' electrons off the cathode to be captured by the anode (clearly this would only work one way). A triode valve would also have a grid to control electrode flow, other valves with more grids for finer control would be named according to the number of electrodes discounting the heater pins in the count.

User Avatar

Wiki User

17y ago

What else can I help you with?