Locked solid state relay (CB8394E)

We found this circuit in a 90s Electronic Design. The components admit current equivalents. The circuit can act as a shield.

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Memory sensor amplifier (CB6809E)
This circuit is from a 1967 documentation. It consists of a sensor for memories used at the time....
10W Amplifier LM1875 (CB25523E)
We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has...
Flasher with two settings (CB6802E)
Found in EEE documentation, this circuit can have the duration and frequency adjusted separately....