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 can be used in 0,5 to 37 V Power supplies and output currents up to 3 A. The...
This circuit is from an Electronics Now, American magazine from December 1992. The magazine no...
This resistance meter with the CA3130 was found in an English publication from 1977. The circuit has...