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1. Topband: CNN notch filter recommendations (score: 1): Author: Kevin KL7KY <kl7ky@mtaonline.net>; Date: Sun, 14 May 2017 08:55:24 -0800; Hi all,Has anyone had "success" notching out a single AM bcb station that +50dB?I see a lot of bcb filters that are commercially made, but wanted some real world feedback from someone that has dealt; /archives//html/Topband/2017-05/msg00051.html (6,646 bytes)
2. Re: Topband: CNN notch filter recommendations (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Sun, 14 May 2017 11:10:26 -0700; I've done a lot of filter design. I am assuming that your requirement is to remove a single station, and that you don't have any requirement to pass the rest of the BCB band. The question is: which i; /archives//html/Topband/2017-05/msg00055.html (9,799 bytes)
3. Re: Topband: CNN notch filter recommendations (score: 1): Author: "James Wolf" <jbwolf@comcast.net>; Date: Sun, 14 May 2017 14:25:23 -0400; Here you can see the measured response of the filter in the commercial K9AY controller. http://www.wolfrfsystems.com/Specs.html Jim, KR9U ___________ _________________ Topband Reflector Archives - ht; /archives//html/Topband/2017-05/msg00056.html (8,398 bytes)
4. Re: Topband: CNN notch filter recommendations (score: 1): Author: Kevin KL7KY <kl7ky@mtaonline.net>; Date: Sun, 14 May 2017 15:02:37 -0800; Frstly...sorry about the CNN ...dang auto correct got by me that time...i meant BCB..Thanks for all the input guys!Kevin KL7KY http://www.wolfrfsystems.com/Specs.html Jim, KR9U ___________ _________; /archives//html/Topband/2017-05/msg00061.html (8,862 bytes)
5. Re: Topband: CNN notch filter recommendations (score: 1): Author: "JC" <n4is@comcast.net>; Date: Sun, 14 May 2017 19:24:52 -0400; Kevin There is a well known DLW Associates AM Broadcast Band Brick-Wall High Pass Filters http://dlwc.com/ The 9 pole filter can be tuned for one of the deep nulls attenuate the station you need by 7; /archives//html/Topband/2017-05/msg00062.html (8,551 bytes)

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