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.
The design of this reader is truly unprecedented, as it allows the replacement of a common reactor in...
We found this 2-transistor circuit in Radio Electronics magazine from July 1961. The circuit is...
This is an old 1988 circuit consisting of a timer or time control for exposing silk-screen arrays. The...