This 9 W amplifier with transistors from the 60's was found in documentation of the time. The output transistors must be mounted on heat radiators and the power supply is included.
This variable power supply circuit was found in a German publication from the 1980s. The circuit is...
This simple circuit for switching RF signals was found in an RF Design from the 90s. The circuit...
We found this circuit in a 1983 English magazine, but it can be easily assembled with the BC548 or...