Most experienced amateurs know that SSB (single side band) reception requires a receiver fitted with a product detector or BFO (beat frequency oscillator) to reinsert the missing carrier. They also know that such receivers command significantly higher prices than AM only models. It is also a fact that signals broadcast using SSB tend to be far more interesting to amateurs and shortwave listeners than the standard AM broadcasts. The problem is most readers only have a standard AM shortwave receiver - onet that is incapable of SSB reception.

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