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.
This simple multitester tests continuity, semiconductors, leaks, and other common component...
This configuration can be implemented with equivalent operations. The circuit is from the 1990...
This circuit is one of many that we have in our section. It was taken from the Electronics...