I soldered one radio circuit for a wave transmission with ~107 MHz frequency and I got good results. I simulated this circuit in LTSpice, too. What I have seen was that the wave got AM modulated and the result of all was that the circuit feeding voltage was modulated properly according to the input, too. My question is about, if the feeding voltage is responsible for the carrier frequency and if it is the reason for reaching long distance during transmission?
It appears that you have wired an RF amplifier for 107 MHz, following a schematic that you've successfully tested on LTSpice.
You have successfully received at a distance, an unmodulated / amplitude modulated 107 MHz carrier fed to the RF amplifier with it's antenna connected.
The RF amplifier is responsible for amplifying the power of the carrier being fed to the antenna for transmission.
Higher the required range greater the required transmitted power and greater the DC power input to the RF amplifier.