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 was found in a Hands On Electronics with the suggested application an optical link for...
We found this circuit in a 1977 factory documentation. The operational amplifiers can be 741 and...
This simple power supply for transistors was found in documentation from the 1940s. The...