need help wana change 60-Hz twin-T notch filter to 279 Hz filter
the twin-T 60-Hz notch filter work extremly well but i also need one for 279 hz or close to it were i keep getting it wrong is the band width wrong .the 60 hz twin-T notchfilter-60 db which can adjusted in r5
math f/c =1 /( 3.142 *r1 *c1*2)
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