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.
We found this circuit for vocal effects in the September 1990 issue of Radio Electronics magazine. The...
This circuit was found in a 80’s American documentation. The adjustment trimpot is from 47k to...
This circuit produces a single pulse whose duration depends on the capacitor. The circuit is from an...