The purpose of this circuit is to measure the resistance of an antenna at the resonant frequency. The circuit is from an old American documentation for hams.
This circuit was found in a Hands On Electronics from the 90s. The microphone is a small 75-ohm...
ON Semiconductor MC74VHX1Gx Logic ICs The Mouser Electronics series 74 Logic ICs are available for...
Settings like to this can be found elsewhere in this section. This was found in an American...