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#11
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Update: DTV antenna on VHF
On Sun, 14 Jun 2009 10:03:29 -0700, Richard Clark wrote:
On Sun, 14 Jun 2009 10:03:29 -0700, Richard Clark wrote: On Sun, 14 Jun 2009 10:17:20 -0500, Rich Griffiths wrote: Shannon's equations don't actually tell you much that's useful, as a Ham. This would presume that the Ham is rather indifferent or incapable. Shannon's work is exceedingly useful snip Well, I do admit that I went overboard there! Probably shouldn't speak too quickly about moonbounce, meteor scatter, etc. I do think, however, that for many Hams (me, at least :-) ) the applicable word is "indifferent" rather than "incapable". If you can genuinely find useful application to what microwave rovers do -- or most microwave operators, for that matter -- that would be a special contribution. I expect that would be even less likely for most HF and VHF operations. I'd characterize Shannon's work as more of academic interest (for most Ham radio) than practical interest. In most of what most Hams do, there are just too many other issues to deal with. Please note the use of the word "most". I'm sure there are exceptions, but I expect they're a small part of hamdom (as is microwaving, sigh). -- Rich W2RG |
#12
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Update: DTV antenna on VHF
I'd characterize Shannon's work as more of academic interest (for most Ham radio) than practical interest. *In most of what most Hams do, there are just too many other issues to deal with. Please note the use of the word "most". *I'm sure there are exceptions, but I expect they're a small part of hamdom (as is microwaving, sigh). -- Rich * W2RG I think you've hit the nail on the head.. If you're communicating with deep space probes, you've probably already eked out the last tenth of dB everywhere else in the system, so you can worry about coding and how close you are to the Shannon limit. If you're a ham, especially microwave rovering, then getting the last couple dB is the least of your problems. It's easier for the ham to get 3dB by some other means than, say, implementing coding. Where some kind soul has made using coding easy, it's used (e.g. JT65). |
#13
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Update: DTV antenna on VHF
"Rich Griffiths" wrote in message ations... On Sun, 14 Jun 2009 00:46:50 -0700, Sal M. Onella wrote: "Rich Griffiths" wrote in message communications... Until this past year (when rotator cuff surgery took me out), I had been doing quite a bit of microwave work as a rover (903 MHz - 10 GHz). I was often impressed by how far over the horizon it would work with an antenna only about 5 ft off the ground and about 1 W of power. I did a little mickey-wave engineering, myself. Point-to-point is easier than broadcast! "Sal" snip but as a rover the operating mantra was always just 'Let's try it". snip As an amateur rover, I generally found point-to-point to be more difficult, because of simple real-world Ham issues that don't have a lot to do with heavy theory. That changes things for me! I didn't know the term "microwave rover" was being applied to amateur radio. I never heard it before and I wrongly thought you were talking about work -- traveling as a microwave installer. My bad. I am absolutely a believer in "Let's try it!" Some very good times have come as surprises. "Sal" |
#14
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Update: DTV antenna on VHF
On Tue, 16 Jun 2009 13:06:53 -0700, Sal M. Onella wrote:
snip I didn't know the term "microwave rover" was being applied to amateur radio. Roving (or "rovering", nobody seems to know which it should be) is a great aspect of VHF & up operating. It's taken me to some beautiful sites where it was wonderful to be in the outdoors enjoying the weather and the radio at the same time -- except in January ;-) Rover is a separate category in the ARRL and other VHF & Up contests. See, e.g., http://www.arrl.org/contests/rules/2008/jan-vhf-ss.html Us hard-working, dedicated operators :-) get special consideration when computing scores. -- Rich |
#15
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Update: DTV antenna on VHF
Rich Griffiths wrote:
Roving (or "rovering", nobody seems to know which it should be) is a great aspect of VHF & up operating. It's taken me to some beautiful sites where it was wonderful to be in the outdoors enjoying the weather and the radio at the same time -- except in January ;-) Rover is a separate category in the ARRL and other VHF & Up contests. See, e.g., http://www.arrl.org/contests/rules/2008/jan-vhf-ss.html Us hard-working, dedicated operators :-) get special consideration when computing scores. As a member of the club that has taken roving to new heights over the years, I can safely say that it is indeed "roving". The rovers got us as many 10GHz grids this weekend as the sum total of the previous 11 contests. And they don't play the games that some of the east coast "owned" rovers do. The rovers in the upper Midwest will, and will try to, work anyone and everyone. Cooperation amongst competition makes for a better contest. And thank you for roving, something I always take the time to say to anyone signing /R during the contest. You guys are definitely the hard working and dedicated operators out there. I just wish roverlog wasn't so weird and flaky. tom K0TAR |
#16
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Update: DTV antenna on VHF
On Tue, 16 Jun 2009 20:09:04 -0500, tom wrote:
Rich Griffiths wrote: snip my stuff As a member of the club that has taken roving to new heights over the years, I can safely say that it is indeed "roving". The rovers got us as many 10GHz grids this weekend as the sum total of the previous 11 contests. And they don't play the games that some of the east coast "owned" rovers do. Ssshhhh! That's supposed to be a secret ;-) The rovers in the upper Midwest will, and will try to, work anyone and everyone. Cooperation amongst competition makes for a better contest. I have no sense of shame. I'll work anyone :-) And thank you for roving, something I always take the time to say to anyone signing /R during the contest. You guys are definitely the hard working and dedicated operators out there. My pleasure, but I appreciate the compliment. -- Rich W2RG EM79 (and EM78, EN80, EM89, ....) |
#17
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Update: DTV antenna on VHF
Rich Griffiths wrote:
The rovers got us as many 10GHz grids this weekend as the sum total of the previous 11 contests. And they don't play the games that some of the east coast "owned" rovers do. Ssshhhh! That's supposed to be a secret ;-) An unfortunate smear on the east coast in general, especially since I am from there. It is well known who the stations/clubs are that get away with it. I would make a disparaging remark about the blessed League caring about cheating here, but it would offend the masses. tom K0TAR |
#18
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Update: DTV antenna on VHF
tom wrote:
Rich Griffiths wrote: The rovers got us as many 10GHz grids this weekend as the sum total of the previous 11 contests. And they don't play the games that some of the east coast "owned" rovers do. Ssshhhh! That's supposed to be a secret ;-) An unfortunate smear on the east coast in general, especially since I am from there. It is well known who the stations/clubs are that get away with it. I would make a disparaging remark about the blessed League caring about cheating here, but it would offend the masses. All contesters cheat except for me and thee.... So if I go roving, and I don't belong to one of these clubs, will they not talk to me? And if they are cheating, and it's documented, why hasn't anyone submitted proof, and get their sorry butts DQ'ed? Takes lots of people to cheat, those cheating, and those putting up with it. Sorry for the rant, but as a person who runs a contest, I get many, many accusations of people or clubs cheating, and precious little to support that. Most of the time the accuser pops up with great angst, describing the terrible situation, the nefarious cheaters, and often the complicity of the contest organizers. Then when pressed for proof, the reply is usually "Gee, I don't want to start anything!" Not sayin, I'm just sayin'... - 73 de Mike N3LI - |
#19
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Update: DTV antenna on VHF
On Jun 18, 11:59*am, Michael Coslo wrote:
tom wrote: Rich Griffiths wrote: The rovers got us as many 10GHz grids this weekend as the sum total of the previous 11 contests. *And they don't play the games that some of the east coast "owned" rovers do. Ssshhhh! * That's supposed to be a secret *;-) An unfortunate smear on the east coast in general, especially since I am from there. *It is well known who the stations/clubs are that get away with it. *I would make a disparaging remark about the blessed League caring about cheating here, but it would offend the masses. * * * * All contesters cheat except for me and thee.... So if I go roving, and I don't belong to one of these clubs, will they not talk to me? And if they are cheating, and it's documented, why hasn't anyone submitted proof, and get their sorry butts DQ'ed? Takes lots of people to cheat, those cheating, and those putting up with it. Sorry for the rant, but as a person who runs a contest, I get many, many accusations of people or clubs cheating, and precious little to support that. Most of the time the accuser pops up with great angst, describing the terrible situation, the nefarious cheaters, and often the complicity of the contest organizers. Then when pressed for proof, the reply is usually "Gee, I don't want to start anything!" Not sayin, I'm just sayin'... * * * * - 73 de Mike N3LI - Hey, Dark Guard. Long time no hear. I thought you were active on in misc.survivalism? |
#20
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Update: DTV antenna on VHF
Michael Coslo wrote:
All contesters cheat except for me and thee.... So if I go roving, and I don't belong to one of these clubs, will they not talk to me? And if they are cheating, and it's documented, why hasn't anyone submitted proof, and get their sorry butts DQ'ed? Takes lots of people to cheat, those cheating, and those putting up with it. Sorry for the rant, but as a person who runs a contest, I get many, many accusations of people or clubs cheating, and precious little to support that. Most of the time the accuser pops up with great angst, describing the terrible situation, the nefarious cheaters, and often the complicity of the contest organizers. Then when pressed for proof, the reply is usually "Gee, I don't want to start anything!" Not sayin, I'm just sayin'... - 73 de Mike N3LI - First, not all contesters cheat. My experience is few VHF and up contesters cheat. Second, the rovers are the key to the cheat. Fixed stations love to work rovers because of the point and grid benefits. The cheating is the rovers who won't work anyone but the mothership. Third, it's not documented since no one will publicly admit to it, which should be obvious. Privately is a different matter. The cheaters are known. Very well known in some cases. tom K0TAR |
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