Found in the book 303 Circuits, this circuit compresses signals from 25 mV to 20 Vpp to intensities of 1.5 Vpp to 3.5 Vpp. The frequency range is from 7 Hz to 67 kHz.
This powerful FM transmitter with FET can reach more than 1 km in favorable conditions. L1...
Found in Popular Electronics from the 90s, this circuit generates two tones that are selected by a...
Found in a 73 magazine for radio amateurs of the 90s, this circuit provides a 2 kV voltage with 7.5...