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Total 5 documents matching your query.

1. [TenTec] Noise reduction of roofing filter? (score: 1): Author: "Peter Hoon" <peter@nednet.net>; Date: Tue, 6 Mar 2007 15:53:29 -0700; Fellows, Am hearing disabled, own an Omni 6 Plus mostly for CW, and cascade the 250 Hz 6.3 IF CW filter along with the "low note" 221 250 Hz CW filter in the 9 mHz IF (position N-2). In reality, my s; /archives//html/TenTec/2007-03/msg00125.html (7,334 bytes)
2. Re: [TenTec] Noise reduction of roofing filter? (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Wed, 07 Mar 2007 10:52:50 -0600; Probably not. The filter tends to integrate the pulse and reduce the bandwidth at the expense of stretching it out in time. The narrower and the sharper cornered the filter frequency response, the wo; /archives//html/TenTec/2007-03/msg00159.html (9,451 bytes)
3. Re: [TenTec] Noise reduction of roofing filter? (score: 1): Author: "Grant Youngman" <nq5t@tx.rr.com>; Date: Wed, 7 Mar 2007 11:41:36 -0600; Another undesirable side effect is that the pulse stretching can have significant negative impact on the effectiveness of the NB. Grant/NQ5T _______________________________________________ TenTec ma; /archives//html/TenTec/2007-03/msg00162.html (7,881 bytes)
4. Re: [TenTec] Noise reduction of roofing filter? (score: 1): Author: Bill Cotter <n4alg@qx.net>; Date: Wed, 07 Mar 2007 13:39:05 -0500; Peter, I have the Inrad 763 filter (600Hz CW, 9000.7kHz IF) installed on the roofing filter board, Inrad 759 filter (400Hz CW, 9000.7kHz IF, N2) and Inrad 750 filter (400Hz CW, 6299.25kHz IF) install; /archives//html/TenTec/2007-03/msg00165.html (12,156 bytes)
5. Re: [TenTec] Noise reduction of roofing filter? (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Wed, 07 Mar 2007 13:49:23 -0600; And it cuts down on how much the peaks of the noise spikes overload stages. The more you narrow the band going into the DSP, the more you handicap its noise reduction algorithms. -- 73, Jerry, K0CQ,; /archives//html/TenTec/2007-03/msg00169.html (9,977 bytes)

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