Radio Receivers
Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from

Instability
Gain variation over the frequency coverage range
Inadequate selectivity at high frequencies
Insufficient gain and sensitivity

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Radio Receivers
Indicate the false statement in connection with communications receivers.

Double conversion is used to improve image rejection
Variable sensitivity is used to eliminate selective fading
A product demodulator could be used for the reception of Morse code.
The noise limiter cuts off the receiver’s output during a noise pulse.

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