This passive circuit was found in a 1980s documentation. The circuit serves to indicate the balance or balance between the channels of a stereo amplifier.
This operational amplifier configuration has gain controlled by an external voltage applied to a...
This circuit is from a Popular Electronics from July 1990. The magazine no longer exists, but the...
We found this 4.5 MHz amplifier for video signals from old analog TVs in the June 1992 issue of...