S-meter for receivers (CB7926E)

The S-meter is a signal strength meter used in communication receivers. This circuit was found in a 303 Circuits from the 90s, European publication.

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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...