Warning shield (CB6855E)

This circuit uses a General Electric coupler from the time of the publication in the 1980s. Equivalent SCR can be used.

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High gain current sensor (CB8208E)
Found in a 90s Popular Electronics this circuit has its gain given by R2. This component can be...
20 + 20 W Amplifier (CB26264E)
Using NEC 70001 AB integrated circuits, this 20 W per channel stereo amplifier was republished in the...
Optical PFM Receiver (CB15961E)
In the figure we have a receiver for frequency modulated light signals (see the transmitter in...