We found this circuit in a French documentation from the 80's. The components used are still common and the circuit can generate signals from 10 Hz to 100 kHz.
The purpose of this circuit is to provide a few watts of power to a heavy speaker with good sound...
This circuit, found in US documentation, can measure the power of transmitters up to 10 W, given...
This circuit was obtained in a 1975 documentation. It is intended for old vehicles that still use...