diode means two and it means that it has two electrodes Kathode and Anode. electrones are being "shot" from Kathode and being attracted by Anode when the voltage is applied to these electrodes.
triode means three electrodes are in the vacume tube Kathode Anode and Grid. triode has to be fed with kathode and gride offset voltages and the small variation of the input Grid voltage will inflict the large variation of the anode. this event is called amplification.
tetrode means four...
penthode means five...
dual-triode means two triodes in one bulb...
triode means three electrodes are in the vacume tube Kathode Anode and Grid. triode has to be fed with kathode and gride offset voltages and the small variation of the input Grid voltage will inflict the large variation of the anode. this event is called amplification.
tetrode means four...
penthode means five...
dual-triode means two triodes in one bulb...