| 21. | Crystal-controlled superheterodyne receivers with better selectivity and stability made control equipment more capable and at lower cost.
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| 22. | Modern radio tuners use a superheterodyne receiver with tuning selected by adjustment of the frequency of a local oscillator.
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| 23. | A single transistor combines the functions of amplifier, mixer and local oscillator of an otherwise conventional superheterodyne receiver.
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| 24. | The TR-1 was a superheterodyne receiver made with four n-p-n transistors and one diode.
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| 25. | Most superheterodyne receivers designed for broadcast FM ( 88-108 MHz ) use an IF of 10.7 MHz.
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| 26. | Dynamic calibration is needed when there are long waveguide runs between the antenna and first down converter ( see Superheterodyne receiver ).
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| 27. | Most receivers are actually superheterodyne receivers and they leak a little of their local oscillator frequency; this can be easily detected.
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| 28. | Early superheterodyne receivers used IFs as low as 20 kHz, often based on the self-resonance of iron-cored transformers.
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| 29. | For example, a key component of a superheterodyne receiver is a mixer used to move received signals to a common intermediate frequency.
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| 30. | Armstrong's concept of the superheterodyne receiver to filter out noise and amplify the original signal is used in the cordless phone.
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