This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer are the critical components in the circuit and power comes from 6 D cells.
This circuit, which is part of a percussion instrument, was found in the September 1979 issue of...
The circuit shown in the figure, generates a positive pulse whose duration depends on C1, from the...
Found in the 1989 Radio Electronics Experimenter special edition, this circuit was designed for...