12V x 1A power supply (CB21851E)

This stabilized power supply was found in the 1974 Ferranti transistor manual. The power transistor must be mounted on a heatsink.

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Capacitance Bridge (CB10666E)
This circuit is from a Popular Electronics from July 1990. The magazine no longer exists, but the...
High Q Active Notch Filter MC34071 (CB15281E)
Other operational amplifiers series, such as MC34072, MC34074, MC35071, MC35072, MC35074 d MC33071...
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