What is the difference between heterodyning and superheterodyning?

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When you combine signals of the same or different frequencies. The resulting energy will be each original frequency and the sum of the frequencies and a frequency that is the difference of the two signals. This is the basis of heterodyning. This allows us to take an information signal and "upconvert" it to the RF realm for transmission. But the same processes can be used to "downconvert" or to beat one signal against the other to get a lower frequency representation of the energy. After hererodyning came out, newer radios were sold as superheterodyning as a marketing ploy. Sorry, but it is not more complex than that. This was back in the early 20th century and the idea of fair marketing or truthful processes were not legal issues like today. Have a nice day. Bob
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