This circuit is the digital indicator for the previous circuit and can be used with similar circuits. The circuit is from an article in Radio Electronics magazine, June 1987.
We found this configuration in an old 1970s American documentation. The circuit may use equivalent...
This circuit was obtained in a 90s Electronic Design. The circuit uses components from that time....
This circuit connected to the input of a good amplifier, with suitable coils can tune stations of medium...