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Two Transistor Reflex Radio
The first transistor acts as a reflex stage. A 10 millihenry choke sends the RF to the diode detector and the audio to the output stage. This simpler approach is not as sensitive as the transformer feedback version but the addition of a simple one-transistor audio amplifier makes this receiver really scream. You will not be using this radio with the volume control turned up full! And you can really pull in stations with a simple loopstick antenna.