Again, Valve Wizard comes to the rescue. This is the article I use: http://www.valvewizard.co.uk/Common_Gain_Stage.pdf
This is to find the gain and plate resistance of a triode with unbypassed cathode resistor Rk. All explained in p29 to p31. This is the detail derivation I wrote using the article to fill in the missing step so you can see step by step LOGICALLY derive the result. Using ONE SINGLE model to explain the gain and the equivalent plate resistance due to adding the unbypassed Rk.
This is logical, easy to understand and straight forward. I can write the derivation of the Gain and plate resistance in one page using one single Thevenin equivalent from beginning to the end. I am having so much faith on Valve Wizard even though they are mainly for guitar amps. The guy know his electronics.
This is to find the gain and plate resistance of a triode with unbypassed cathode resistor Rk. All explained in p29 to p31. This is the detail derivation I wrote using the article to fill in the missing step so you can see step by step LOGICALLY derive the result. Using ONE SINGLE model to explain the gain and the equivalent plate resistance due to adding the unbypassed Rk.
This is logical, easy to understand and straight forward. I can write the derivation of the Gain and plate resistance in one page using one single Thevenin equivalent from beginning to the end. I am having so much faith on Valve Wizard even though they are mainly for guitar amps. The guy know his electronics.