This Mullard circuit was found in a 1969 documentation. It uses complementary transistors on the output and does not need a transformer. The bandwidth goes from 100 to 20 000 Hz.
Using an LF356 operational, this circuit was found in the September 1989 issue of Radio...
We found this circuit in a 1991 publication, but it can be assembled with more modern components. We can...
This control, which may appear in other versions on this site, was found in documentation from the...