This receiver with earphone listening for the medium wave range was published in Radio Electronics magazine in February 1958. The circuit was powered by a 15 V battery.
In the figure we have the traditional configuration of a phase shift oscillator that produces a...
This circuit produces an intermittent sound in a ceramic piezoelectric transducer, for example, a simple...
If you have a common analog multimeter, you can increase its input resistance in the measurement of...