This circuit for the 60 kHz range was found in 73 magazine and published in 1995. The circuit uses a ferrite rod. Note the direction of the coil windings.
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...