Based on the LTC3862, this circuit consists of a DC-DC converter capable of operating with input voltages lower than the desired output. MOSFET admits equivalent.
This balance control for the channels of a stereo system was found in a 1969 Mullard...
The article that teaches the assembly is from a Radio Electronics issue from July 1969. The...
Found in old English documentation, this circuit is still current. The circuit trips with a sound...