BASIC_VACUUM_TUBE_REGENERATIVE_DETECTOR

Published:2009/7/13 3:52:00 Author:May | From:SeekIC

The traditional tube-based regenerative receiver is essentially an Armstrong RF oscillator with variable feedback that is connected to an antenna and a resonant circuit. C1 is usually a 140-pF variable capacitor, and L1 and L2 are wound on a plug-in coil form, with L2 typically having 10 to 20 percent of the turns on L1 and wound next to the cold side of L1. The inductance depends on the desired frequency range, but 150 kHz to about 18 MHz is typical for this circuit.



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