Greetings from the land of vintage microphone brands

[CaptainCapsule]

Hello together,

I'm intersted in tube amplifiers and already built a JTM45 clone. I'm interested in building a C12 clone. But because I don't have a electronics or enginerring background I don't understand the c12 schematics completly. For example its not clear to me why anode, kathode, heater and grid ist connected on the second triode. Are there tutorial videos that explain the c12 schematics or is there literatur that explain each component of the c12 circuit?

Best greetings and thanks,

Felix