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741 Active 60 Hz Notch Filter Circuit

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741 Active 60 Hz Notch Filter Circuit
741 Active 60 Hz Notch Filter Circuit Graph
A very powerful 60Hz active notch active filter using a single 741 chip. Passes all frequencies between 1 Hz to 10 KHz flat but suppresses 60 Hz hum around - 28 DB. Input impedance is around 1000 Ohms and output impedance can be as low as 500 Ohms.