This circuit was found in Motorola's 1967 documentation. The circuit makes use of power transistors of the time. For pulse pickup an appropriate pickup coil is used.
We found this circuit in the October 1979 issue of Radio Electronics magazine. It uses a 7016...
This circuit is from a 1980 publication. The circuit has high gain with weak signals and lower gain...
This simple electronic organ with a tremolo effect was found in a 1981 publication, but it can be...