This is the receiver for the previous circuit, also found in 90s Radio Electronics. The circuit operates at 2.25 MHz, detecting variations in signal frequency due to the Doppler effect.
This MW radio for the medium wave range (OM) uses three transistors and outputs to a speaker. L2...
With this circuit the visually impaired can easily locate important places inside the house, such...
This circuit, which can serve as a reference for restorations, was found in the October 1989 issue...