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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Crystal controlled oscillator (CB9643E)
Found in documentation from the 1980s, this circuit can generate signals in a range that reaches a few...
Universal motor control with delay (CB7938E)
Found in a 1967 publication by General Electric, this control is intended for motors up to 2 A...
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This circuit was found in a 90s Popular Electronics. The circuit uses components from that time,...