Passive tunable filter (CB7407E)

Found in American documentation from the 1980s, this circuit is a basic signal rejection filter network using only passive components.

| Clique na imagem para ampliar |

Vehicle Immobilizer II (CB1424E)
We find this circuit in an American publication of 1978. It is intended only for cars that have...
High current dimmer (CB7214E)
In fact, this dimmer can be used with currents up to 1.5 A according to the General Electric...
Commercial Receiver TS 600 (CB18378E)
This 6-transistor transistor radio was manufactured in Japan in the 1960s. It is a portable...