We found this mixer in an American documentation. Operational amplifier supports equivalent and changed number of inputs. Power can be between 6 and 12 V.
Suggested to power the previous circuit, this power supply was found in the December 1990 issue of...
This is a very useful autotransformer circuit on the bench. We found it in the September 1970...
This circuit was obtained in a 1960 documentation of General Electric. It is applied in the...