The RF amplifier circuit 2N5770 (instead of NTE108 or other counterparts) is used to power the 12v power supply based on the MRF515 (2N5943 or NTE77) transistors. The author has increased the power of 10 meters of transmitter with RF amplifier modification to approximately 5 kilometers
The FCC is only 150 meters / meter at 10 meters is allowed. Example of a complete TuneCast system with all cables attached. RF output power is about 120 milliwatts. There is no way to be used.