This circuit is from a Radio Electronics from October 1963. The transistor is a power transistor of the time, and two transformers are used. The input has 10k impedance and is powered by 12 V.
This circuit was found in a Popular Electronics from the 90s. The effect circuit uses components...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
The circuit shown is suggested by National Semiconductor in its 1994 Linear Applications Handbook. The...