I've found and built 5x circuits to receive commercial FM broadcasts, but none of them work.
I saw the following circuit (below) that had two new twists, 1) regenerative, and 2) used a jfet.
I built it exactly as described, but used a 3-24pF variable capacitor in place of the 15p/80pF,
and am using my LM386 bench amp conected at C6 and ground. I couldn't even get
this to oscillate.
I can indeed receive FM broadcast at my location, I have a crappy transistor radio that does okay.
Am I expecting too much from a simple circuit?
https://www.circuitbasics.com/what-are-fm-receivers/
I saw the following circuit (below) that had two new twists, 1) regenerative, and 2) used a jfet.
I built it exactly as described, but used a 3-24pF variable capacitor in place of the 15p/80pF,
and am using my LM386 bench amp conected at C6 and ground. I couldn't even get
this to oscillate.
I can indeed receive FM broadcast at my location, I have a crappy transistor radio that does okay.
Am I expecting too much from a simple circuit?
https://www.circuitbasics.com/what-are-fm-receivers/