The signal from this transmitter is injected into a cable that you want to follow along a pipeline. Monitoring is done using an ordinary AM receiver out of season.
This circuit was found in the September 1972 issue of Radio Electronics magazine. The circuit uses...
The circuit shown in the figure consists of an amplifier for stereo sources with Maxim's MAX9723...
This circuit was obtained in a 1980 edition of Elementary Electronics a magazine that no longer...