I have been doing some reading on these devices (although obsolete they are still amusing to be plus I feel transistor are much more complicated at this point) and I wanted to ask some questions that I couldn't find through regular google searches.
From all of the literature that I have been seeing, the input signal is placed in the grid (Duh) and the other end of the signal is placed at the cathode (correct me if i'm wrong). My question is that if the tube is supposed to replicate the original sound signal rather than adding to it (by using the small sound signal to control the bigger current in such a way that it mimics the original signal but larger) I am also aware of the effect each polarity has on the grid, When applied the negative polarity the electrons stop flowing to the plate (or very minimal reach it) but when applied a positive potential the flow of electrons increases (make the voltage more powerful by using the grid to make them flow at a higher velocity).
I have been getting the impression that the grid is more of an electrically controlled switch and in no way adds more power to the bigger current (the plate voltage connected to the cathode and plate). I thought that the amount of power doesn't increase beyond that of the power supply to the cathode and plate. Am I right assuming that it doesn't produce more voltage than given and instead controls the flow of electrons to the plate rather than using the grid to add more power than what the power supply is providing (the one connected to the plate and cathode). If the grid in fact does add power instead of controlling it without any addition to the power it was supplied with how do I calculate the gain by knowing the applied current (positive make the electrons flow) and the applied power between the cathode and plate?
From all of the literature that I have been seeing, the input signal is placed in the grid (Duh) and the other end of the signal is placed at the cathode (correct me if i'm wrong). My question is that if the tube is supposed to replicate the original sound signal rather than adding to it (by using the small sound signal to control the bigger current in such a way that it mimics the original signal but larger) I am also aware of the effect each polarity has on the grid, When applied the negative polarity the electrons stop flowing to the plate (or very minimal reach it) but when applied a positive potential the flow of electrons increases (make the voltage more powerful by using the grid to make them flow at a higher velocity).
I have been getting the impression that the grid is more of an electrically controlled switch and in no way adds more power to the bigger current (the plate voltage connected to the cathode and plate). I thought that the amount of power doesn't increase beyond that of the power supply to the cathode and plate. Am I right assuming that it doesn't produce more voltage than given and instead controls the flow of electrons to the plate rather than using the grid to add more power than what the power supply is providing (the one connected to the plate and cathode). If the grid in fact does add power instead of controlling it without any addition to the power it was supplied with how do I calculate the gain by knowing the applied current (positive make the electrons flow) and the applied power between the cathode and plate?