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Heterodyne
Key terms: frequency receiver signal khz mhz tuned oscillator filter mixer tube trf amplifier designs triodes mbox mixing armstrong sensitive local oscillator detect injection sideband modulation coils interference antenna cheaper superheterodyne receiver vacuum much more audible amplification am radio selectivity much higher intermediate frequency transmitter regenerative converter received signal front end morse code mixer stage radio frequency alexanderson carrier frequency beat frequency heard as a series more conveniently superheterodyne principle Search external links cited by footnotes on Wikipedia page Superheterodyne receiver: |
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