Hello, can you help me to understand this circuit? I think it works as power amplifier but I'm kinda new in electronics, so any help is appreciated. Also I'm interested in calculations of this circuit, how much power does it increase in different stages of the circuit or how do I calculate that? Sorry if my english is broken
No, power should go in on C14 - the caps are perfectly fine, obviously 4.7pF - it's a high frequency RF amplifier, and it's fairly normal not to label them any more than that.
IMHO that thing won't work proper.
There is only one biased Transistor?!
And that's direct coupled to a an collector Circuit stage without biasing?!
The last Power Transistor is DC wise shorted with a Coil.
The Circuit C4 / L4 looks like a Bandlock between 2 Amp Stages?!
At RF some things work a little different, but I think that will not work!
Not at all - it's obviously NOT a functional circuit - but the only non-biased one is the first one. The higher powered stages are biased in class-C as is normal for a transmitter.
However, I suspect transmitters isn't something the OP should be getting involved in, as it's not really something for absolute beginners (I'm presuming he's drawn the circuit himself?, based on the non-functioning examples from text books?).