Pin 7 is indeed an IF signal pin, and connecting a detector circuit would be rather complex. The audio signal is only available on pin #11. And an audio driven squelch circuit that rejects noise is quite complex, and does not use 3.3 volts supply.Thanks, gentlemen, good guidance.
Dodgydave : To use pin 7 I would need a 10.7MHz IF presence detector. For unmodulated carrier, there will be no audio embedded there.
Actually in the AM mode that would be 455KHz. Could that still work?To use pin 7 I would need a 10.7MHz IF presence detector
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