Radio Receivers
The image frequency of a superheterodyne receiver

Is not rejected be the IF tuned circuits
Is independent of the frequency to which the receiver is tuned
Is created within the receiver itself
Is due to insufficient adjacent channel rejection

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Radio Receivers
In a radio receiver with simple AGC

The highest AGC voltage is produced
An increase in signal strength produces more AGC
The audio stage gain is normally controlled by the AGC
The faster the AGC time constant the more accurate the output

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Radio Receivers
If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of

Improving the effectiveness of the AGC
Reducing the effect of noise at low modulation depths
Reducing the effect of negative-peak clipping
Improving the selectivity of the receiver

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