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 must be powered by a symmetrical source and has a very high input impedance. The...
The circuit shown simulates a programmable unijunction transistor (PUT). Transistors may be common...
This instrumentation circuit can be applied to equivalent operational amplifiers. We found it in...