Hi Willen, here's how I would go about figuring the values for the interstage matching networks:
1. The first stage is supposed to deliver 200 mW. For simplicity, I'm going to ignore the few pf of transistor output capacitance. You can tweak the values of the inductor and capacitor, once built. When you build it there are going to be parasitic L's and C's anyway to deal with. The load resistor for 200 mW is RL=V^2/(2P), or 12^2/(2*200mW)=360 ohms. I'm going to also assume an input impedance for the following transistor of 5-5j, which is typical. Using an impedance matching program (because who wants to calculate all that by hand?), the values for L and C of the first matching (diagram B) network between the first and middle stages are 37pf and 75 nH.....