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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+Re\:\s+eliminating\s+radio\s+hum\/hiss\s*$/: 4 ]

Total 4 documents matching your query.

1. Topband: Re: eliminating radio hum/hiss (score: 1): Author: Martin <dl1iaq@gdxf.de>; Date: Sat, 7 Feb 2004 01:06:14 +0100; John, George, Jim, Stew and Dave, thanks for your answers and suggestiuons. Some of you suggested to use external dsp-filtering, others suggested to build a bandpass-, high-cut, or low-cut-filter, al; /archives//html/Topband/2004-02/msg00120.html (6,899 bytes)
2. Re: Topband: Re: eliminating radio hum/hiss (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Fri, 6 Feb 2004 22:12:09 -0500; Martin, If you can reduce or eliminate the hum or hiss in or just after the audio amp that might be a good thing to do. Be careful before working with gain distribution! Many radios have hiss because; /archives//html/Topband/2004-02/msg00121.html (8,394 bytes)
3. Re: Topband: Re: eliminating radio hum/hiss (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Fri, 06 Feb 2004 22:46:42 -0500; Well, manufacturers frequently produce "quiet" receivers by filtering out most of [noise AND signal] energy above ~1 kHz. Typical cutoff starts at 1 kHz with ~15 dB attenuation at 2.7 kHz. This remov; /archives//html/Topband/2004-02/msg00122.html (7,273 bytes)
4. Re: Topband: Re: eliminating radio hum/hiss (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Sun, 08 Feb 2004 09:24:04 -0500; Please read "higher speech frequencies" as 1000-2700 Hz. Removing them is quite wrong for SSB, although it's very good for CW. 73, Sinisa YT1NT, VA3TTN _______________________________________________; /archives//html/Topband/2004-02/msg00126.html (7,287 bytes)

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