Just noting that a superheterodyne receiver doesn't transmit on purpose, it's just mostly that it generates an internal frequency reference some multiple of the

Just noting that a superheterodyne receiver doesn't transmit on purpose, it's just mostly that it generates an internal frequency reference some multiple of the target frequency that has a tendency to leak out. For a normal radio this isn't too relevant as the signal isn't particularly strong or in a frequency range where it'll mess with anything. As a bit of an aside: The intermediate frequency leaking is how the police can detect if you're using a radar detector (for avoiding tickets from speed cameras for instance). Of course listening to a faint signal like that is best done with a superheterodyne receiver, so there are radar detectors that detect if the police are using a radar detector detector nearby, which is then in turn of course called a radar detector detector detector. wikipedia has some more info: https://en.wikipedia.org/wiki/Radar_detector#Counter_technology https://en.wikipedia.org/wiki/Radar_detector#Counter_technol...