1. Cathode – The cathode is a negatively charged element in an electron tube. It is the source of free electrons that move through the tube when activated and interact with an anode.
2. Anode – The anode is the positively charged element in an electron tube, and it attracts electrons from the cathode when the tube is activated. The anode is designed to create an open circuit.
3. Plate – The plate is the electrode in an electron tube, usually held by other components that act as collectors, and which carries a voltage. The plate is usually made from metal, and it can be positively or negatively charged.
4. Grid – A grid is an electrode in an electron tube, which is made from metal or carbon, used to control the flow of current between the anode and cathode. It is also used to alter the frequency of the current that passes through.
5. Screen Grid – The screen grid is used in some types of electron tubes, and it is used as a filter between the cathode and plate. It controls the current flow between them, as well as providing extra shielding against interference.
6. Filament – The filament is the part of the electron tube that heats the electrons to make them move. The filament is usually made of coiled metal wire that is attached to the cathode.
7. G1 – G1 is the designation used to identify the grid in an electron tube. It is the two-dimensional grid that controls the electron flow between the anode and cathode.
8. Heater – The heater is the component inside an electron tube that provides the source of heat for the electrons to move. It is usually made from a wire or foil, and it is connected to the filament.
9. Shield – The shield is one of the components in an electron tube that provides protection from certain types of electrical interference. It is a metal box or grid that helps to block out stray electrical fields.
10. Connector – The connector in an electron tube is a device used to attach the tube to its power source, as well as other components. It usually consists of several wires, and is usually soldered or welded to the main body of the tube.