I'm trying to make a FM transmitter work properly. I built the following circuit :
I can synchronize with 94.8Mhz channel on any FM radio, I know that because the original sound from that radio is eliminated and I start to hear sound (hollow sound) each time I tap the microphone. I can also hear (sharply) any whisper I make close to the microphone.
The problem is: I can't hear normal human sound and words spoken through the mic, they seem not to pass on to modulate the carrier. I tried to replace the mic and electronic 10uF coupling capacitor but that didn't fix it. Any idea why such situation can occur ?
Oh yes, the microphone is an electric mic: