I found tis circuit in na old documentation from 1958. The circuit uses germanium transistor availble that time and hard to obtain today. The circuit is indicated for phono applications using variable reluctance transducer.
This simple circuit uses a 200 µA galvanometer to measure voltages in three ranges. The circuit...
This circuit was found in a 1958’s publication. It uses germanium transistor, availble that time....
This circuit is suggested by RCA and is based on a dedicated integrated circuit that is the...