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.
By the components used this circuit of old English documentation can still be easily assembled. The...
The 556 integrated circuit is actually a double 555. This circuit can be assembled from an...
The resistors R1 and R2 consist of 8 220 ohms x 2 W resistors connected in parallel. The...