Updated version with much simpler coil pack board.

This Spectrum Communications kit is a development of the G3RJV Regen receiver published in parts by George Dobbs in PW.  It has been post-designed by myself (G4CFY) and is marketed as the G3RJV/G4CFY Regen Receiver.  This version now includes a single sided front end coil pack and rotary switch allowing ranges 1.8-3.25MHz, 3.25-5.85MHz, 5.85-10.53MHz and 10.53-18.95 MHz.

The circuit uses a field effect transistor as an infinite impedance detector which is fed from a tuned circuit coupled to a Q multiplier circuit.  When the Q multiplier is close to oscillation it considerably enhances the sensitivity of the radio for the reception of amplitude modulated signals.  Just at the point of oscillation a signal is created that mixes with any received single-sideband signals allowing them to be demodulated.

The circuit provides simplicity with good sensitivity and is an ideal entry into home construction of short wave receivers. The kit as shown in the picture includes both PCBs and parts together with potentiometers and a tuning polyvaricon.