The circuit diagram of the 433MHz amplifier is shown in Fig. 1. It is built around transistors C2570 (T1) and 2N5109 (T2), and a few other components. Fig. 1: Circuit diagram of the 433MHz RF range ...

The FM signals are amplified by the VHF preamplifier and the pre-driver stage. You can also use transistor 2N5109 in place of 2N2219. The preamplifier is a tuned class-A RF amplifier and the driver is ...