I build this circuit and it works. I wanted to look at the output waveform by my soundcard oscilloscope software. I would expect something like the following picture:
But the output waveform was this:
The input of the circuit was a song played from my computer. The output of the circuit (the antenna) was connected to the input of the virtual oscilloscope. The other input of the virtual oscilloscope was connected to ground.
My questions are:
1- Why is the output waveform different from standard (or normal) FM waveform?
2- Why is the frequency 100.1 Hz only? I received the signal at 88 Mhz.
Thank you very much,