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1. [RTTY] One more thought on emergency comm (score: 1): Author: Bill Turner <dezrat1242@wildblue.net>; Date: Wed, 11 Dec 2013 21:01:30 -0800; If you really want to use radio to send massive amounts of health and welfare data, how about getting a portable satellite internet setup? I live out in the boonies where I use a system on my roof wh; /archives//html/RTTY/2013-12/msg00080.html (6,856 bytes)
2. Re: [RTTY] One more thought on emergency comm (score: 1): Author: Peter Laws <plaws@plaws.net>; Date: Thu, 12 Dec 2013 11:34:32 -0600; Interestingly, about 10 years ago, the ARC lovely Suburban-type vehicles with every imaginable radio, plus generators and appropriate antennas including satellite Saw one up in Illinois. Would *love*; /archives//html/RTTY/2013-12/msg00083.html (8,098 bytes)
3. Re: [RTTY] One more thought on emergency comm (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 12 Dec 2013 13:03:56 -0500; More generally - "none of it makes wideband data modes imperative below 30 MHz". Take PACTOR III/IV out of the equation. Wideband data modes serve no *amateur* purpose below 30 MHz. They are are not; /archives//html/RTTY/2013-12/msg00084.html (10,337 bytes)
4. Re: [RTTY] One more thought on emergency comm (score: 1): Author: Kok Chen <chen@mac.com>; Date: Thu, 12 Dec 2013 10:30:18 -0800; Joe, I wouldn't generalize like this. *We* have problems with running 2 tone FSK at higher bit rates. But the modern modes have lots of technology that are built in to counter the ionosphere that ste; /archives//html/RTTY/2013-12/msg00085.html (9,023 bytes)
5. Re: [RTTY] One more thought on emergency comm (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 12 Dec 2013 17:56:52 -0500; All things being equal - similar levels of convolutional coding, similar symbol rates, etc. - as the number of carriers increases and the bandwidth gets wider, for a constant PEP output, the peak pow; /archives//html/RTTY/2013-12/msg00089.html (12,012 bytes)
6. Re: [RTTY] One more thought on emergency comm (score: 1): Author: Kok Chen <chen@mac.com>; Date: Thu, 12 Dec 2013 15:15:57 -0800; Joe, Many of the modern modes either do not use sub-carriers (check out the Harris mil spec modems), or use very few of them. The crest factor of Pactor 4, for example is only 4 dB. That is only 1 dB; /archives//html/RTTY/2013-12/msg00090.html (9,087 bytes)

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