With this circuit, we can have a remote frequency control of a tuned circuit. Lx is the coil of the tuned circuit and is based on BB809, a varicap that will determine the frequency range scanned. This component can be replaced according to the frequency range you want to tune. The connection cable between the circuit and the control point must be shielded, so that there is no instability or frequency modulation of the signal tuned by the power grid noise.
| Clique na imagem para ampliar |
