It actually consists of a tunable field strength meter. The circuit is of an old documentation and the circuit must be tuned to the frequency to be monitored. The circuit offers the option to use a headset.
This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer...
November 2016 - Mouser Electronics is selling the entry circuit for Analog Devices AD8232 and...
SAM D5x and E5x MCUs Provide Powerful Performance and Enhanced Security Features CHANDLER, Ariz.,...