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In a typical radio receiver, there will be, a tuning stage, several IF stages, followed by an audio amplifier. (And a few other ancillary bits we'll ignore here.)

The signal from the aerial could be a microvolt or less, and the voltage required at the audio stage will be a few volts. It is not absolutely essential that any of the amplification take place in the tuning stage. Most of the amplification will take place in the Intermediate Frequency stages, and a little more in the audio stages.

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