This simple circuit has good gain and can be implemented with any general-purpose transistor. The circuit is from Electronics Now, June 1997. The coil determines the frequency range.
The circuit presented was obtained from a 1976 Italian Radio Elettronica but can be easily...
Using the well-known CK722 and also the CK721, this signal follower or tracer was found in Radio...
This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the...