Regenerative Receivers

Regenerative Receivers Regenerative receivers provide a surprising level of performance with only a handful of components. They excel at receiving amplitude modulated signals from below the AM broadcast band up to the higher short-wave bands above which the superregenerative detector Continue reading

Cell Phone Helper

Cell Phone Helper See the improved circuit below for newer phones. When your cellular phone receives a call, it begins transmitting even before you answer. The circuit shown in fig.1 detects this signal and can operate a variety of devices Continue reading

Low Freq. Antennas

Antennas  Home-made antennas can greatly improve the performance of AM and FM radios, short-wave receivers, and scanners. If you are a talk-radio fan then experiment with the AM band antennas and you will be able to hear shows from all Continue reading