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Low pass filter

Discussion in 'General Electronics Discussion' started by Puno, Feb 25, 2011.

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  1. Puno

    Puno

    29
    0
    Feb 25, 2011
    Hi

    I need some help in designing a low pass filter at 1000kHz of the am band please.
     
  2. Puno

    Puno

    29
    0
    Feb 25, 2011
    thanks Bob for the insight on the subject ok now what happens if i just wanted to filter out one station in the whole band because it is coming through with all harmonics in the whole band drowning other stations.
     
  3. davenn

    davenn Moderator

    13,618
    1,882
    Sep 5, 2009
    extremely difficult to get that sort of degree of filtering with such a tight bandwidth
    almost impossible. As getting a filter notch deep enough to knock out (or close to it) one station it will severely attenuate all other stations either side of it. The AM band is only ~ 1MHz wide.
    Even on the much wider band of the FM band 88-108MHz (20MHz) it would be difficult but not impossible.

    Maybe you just need to look for a receiver that has much more selectivity in its tuning.

    Dave
     
  4. Puno

    Puno

    29
    0
    Feb 25, 2011
    thanks very much for your info Dave.
     
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