Simple AM Radio Receiver

This circuit is
essentially an amplified crystal set. The inductor could be a standard
AM radio ferrite rod antenna while the tuning capacitor is a variable
plastic dielectric gang, intended for small AM radios. The aerial tuned
circuit feeds diode D1 which functions as the detector. A germanium type
is far preferable to a silicon signal diode because its lower forward
voltage enables it to work with smaller signals. The detected signal
from the diode is filtered to remove RF and the recovered audio is fed
to a 2-transistor stage which drives a set of 32O phones from a
Walkman-style player.

Simple AM Radio Receiver Circuit

Simple AM Radio Receiver Circuit Diagram

Author: Peter Goodwin
Copyright: Silicon Chip Electronics

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