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 now known as the G3RJV/G4CFY Regen Receiver.  This version is for 3.5-7.5MHz.

Another version is available as a separate Ebay item covering 7-15MHz.  It is possible to have versions on 1.8-3.8MHz, or 11.0-23.0MHz.   Please send a 'note to the seller' if you wish for either of these  versions.

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 the PCB and parts together with potentiometers and a tuning polyvaricon, but not including knobs.   Controls are;- Main Tune, Fine Tune, Regeneration, & Volume. 

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.

Following the detector is an LM386 audio amplifier to drive a loudspeaker or headphones.  Supply to the detector and Q-multiplier is from an 8V 3-terminal regulator and the unit requires an external 12V or 13.5V supply rated at 300mA.



If you wish to purchase multiple items or products, click Buy on each then request an invoice.  I will send an invoice without multiple carriage costs.