This circuit was found in an ancient American documentation. With it is possible to double the frequency of a transmitter For the range of 6 meters obtaining 8 W. The circuit makes use of varicap.
This circuit is from old documentation but can be applied to modern equivalent components. The...
This is an old 1988 circuit consisting of a timer or time control for exposing silk-screen arrays. The...
This simple 741 circuit was found in the August 1993 Electronics Now magazine. The source must be...