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1. Re: Topband: eliminating radio hum/hiss (score: 1): Author: GALE STEWARD <k3nd@yahoo.com>; Date: Thu, 5 Feb 2004 05:05:11 -0800 (PST); I have used an external, passive audio filter (from a W3NQN QST article) for years on various radios and now on my 850. It uses a bandpass audio filter to roll off low frequencies below 300hz (elimin; /archives//html/Topband/2004-02/msg00068.html (10,788 bytes)
2. Re: Topband: eliminating radio hum/hiss (score: 1): Author: "jbattin" <jbattin@msn.com>; Date: Thu, 5 Feb 2004 09:49:48 -0600; The Bencher SCAF filter was designed specifically as a hiss filter and it works. John K9dx -- Original Message -- From: "GALE STEWARD" <k3nd@yahoo.com> To: "Martin" <dl1iaq@gdxf.de>; "topband reflect; /archives//html/Topband/2004-02/msg00072.html (12,304 bytes)
3. Re: Topband: eliminating radio hum/hiss (score: 1): Author: GALE STEWARD <k3nd@yahoo.com>; Date: Fri, 6 Feb 2004 06:01:41 -0800 (PST); Since several expressed interest, I looked thru my files last night and came up with the following articles for building a speech bandpass filter. The first is by Ed Wetherold, W3NQN. His article "Pa; /archives//html/Topband/2004-02/msg00103.html (8,774 bytes)

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