Flip Flop with SCR (CB6534E)

Found on a Radio Electronics this 80's circuit uses two common SCRs driving lamps. This setting appears elsewhere in this site and this section.

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Tunnel diode simple noise generator (CB23705E)
This circuit was found in Radio Electronics magazine from November 1960. The circuit is powered by a...
Bidirectional Power Voltage Follower (CB16231E)
In the figure we have an application in which the input and output voltage are equal, with the...
Telephone Line Tester (CB21266E)
We found this circuit in a Radio Electronics from the 90s. The circuit is for conventional analog...