This balance control for the channels of a stereo system was found in a 1969 Mullard documentation. The transistors may be the modern BC548 equivalents.
The FET can be a BF245, and the other transistors can be the BC548 and BC558 in this simple AM...
Following the American FCC rules, this 90s Radio Electronics circuit shows how to use a...
The circuit shown in the figure is a more sensitive version of the previous one (CB16105E). Two...