Talk:Triode
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I am afraid that most filaments require a two wire connection to allow current to flow through them to cause heating. The filament heater is sometimes separate and sometimes electricaly isolated from the cathode. So a triode may require 4 or 5 leads. I think leaving this out may confuse some. Perhaps someday more about their history could be added. I believe this invention is attributed to Lee DeForest and that triodes were originally called audions. I also think there was some confusion about the importance of vacuum. I think the issue was resolved with the introduction of the "getter".
Gas-filled?
I doubt that the British call a VACUUM tube a GAS FILLED tube. One has gas, the other cannot.Thortful 07:25, 10 Nov 2004 (UTC)