This circuit is from a Hands-On Electronics from the 90s. The integrated amplifiers used are well known. The range is a few tens of meters depending on the resistance of the cables.
This circuit was found in an Electronics World magazine from 1990. The circuit can be mounted...
This interesting circuit found in a European publication from the 1990s eliminates the voice that...
Found in a 70s RCA transistor manual, this circuit is recommended for mass-positive cars of the...