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Low pass filter

Puno

Feb 25, 2011
29
Joined
Feb 25, 2011
Messages
29
Hi

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

Puno

Feb 25, 2011
29
Joined
Feb 25, 2011
Messages
29
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.
 

davenn

Moderator
Sep 5, 2009
14,077
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Sep 5, 2009
Messages
14,077
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.

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
 
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