This circuit is from a 1968 Electronic Design. The components are from the era and the operating frequency is 60 MHz. No data on the coils is provided.
This simple audio signal tracer or follower can be made with a BC548 instead of the original...
The circuit shown in figure 1 is a suggested application for ISL8107, a new integrated circuit from...
This notch filter or reject filter rejects signals of a certain frequency with good selectivity. The...