This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
This RF signal meter has a switch position that allows calibration and comparison of low intensity...
April 2017 - Texas Instruments bq51222 integrated circuit for chargers and other Qi wireless power...
We found this circuit in an American 1980s documentation. The circuit can be easily assembled in our...