This circuit allows you to adjust the balance between channels of a stereo amplifier. The circuit makes use of an analog indicator with zero in the center of the scale.
This excellent 3-transistors audio preamplifier is suitable for use with low impedance...
This circuit allows the use of a milliammeter in the measurement of low frequency alternating...
We found this circuit in an American 1980s documentation. The circuit can be assembled with modern...