Single Crystal Filter (CB6542E)

High selectivity filters can be obtained by combining same frequency crystals in series as shown in the circuit.

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Symmetrical regulator (CB23782E)
This circuit was found in a Radio Electronics from June 1967. The regulator is suitable for power...
Video Game (CB24556E)
This complete video game circuit was found in the May 1978 issue of Radio Electronics magazine. The...
Touch Sequential (CB16947E)
This circuit sequentially drives loads connected to its outputs or even applies the signals to the...