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 600-ohm output impedance circuit was found in a Radio Electronics from October 1963. The...
This circuit was found in ancient American documentation. Diodes are general-purpose types. |...
Found in American documentation from the 90's, this circuit is very current and can be implemented with...