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.
The OR function has the truth table shown next to the diagram in the figure. We have the output at...
The component used in this circuit is not very common today as the circuit is from the 80's. It...
This is a basic flip flop circuit with neon lights. We found it in a Radio Electronics magazine from...