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 1992 Electronics Hobbyst Handbook. The circuit is for the 110 V power...
The TBA810 integrated circuit is no longer common today. This circuit shows an application of this...
This soft starter dimmer was found in a 1980s documentation. We can implement it with current...