2) If it's supposed to have 9v (and schematics is not completely correct), where is my understanding wrong, and how is it going to produce 5w output?
Andrey,
If it is built for 9 volts then the PA gets 9 volts, you could say the schematic is wrongly labelled.
3.6 to 5 Watts makes little difference to the end user. (Receiver, maybe 1.5dB) but squeezing/spreading turns on the LPFs might increase it.
73 Alan G4ZFQ
