This circuit controls the passage of the signal from one speaker to another. The potentiometers must be of wire 50 to 100 ohms with dissipation according to the power of the sound system.
This circuit, found in a 2008 documentation, is intended for operation by radio amateurs in the 7...
In this phase shift circuit, the transistor can be any general-purpose transistor. The circuit is from...
This simple circuit can be used to power a simple communication system using ordinary telephones....