Radar detector (CB8628E)

Found in a 90s Electronics Engineering, this circuit makes use of components of the time. The critical component is the microwave sensor diode.

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Successive Tone Decoder PLL (CB3958E)
This circuit with the known PLL 567 can be found in other versions in this section and in this...
Doubler from 150 to 300 MHz (CB4870E)
We find this circuit in the 80s used integrated circuit manual itself. The integrated circuit is not...
Locked Alarm (CB4800E)
This lock-up alarm circuit was found in a 1990s Radio Electronics magazine. The sensors are...