We found this circuit in a 1969 Mullard documentation. The same configuration appears elsewhere in this section. The control range is -2 dB to 19.5 dB at 30 Hz.
This amplifier with low impedance OTL output was found in documentation from the 1960s. The...
A touch of the sensor makes the load bistable (load) connected in Q1. For a BC548, a 6 V or 12 V...
The sensor for this circuit, found in a 1968 magazine is a common LDR. The diode is for general use...