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How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
"Radium" wrote in message ps.com... OTOH, AM video is boring. FM video is better. As I said before, the Y [luminance] signal should be carried on an FM wave rather than an AM wave. OK, but then, you're quite ignorant of anything remotely related to this field, aren't you? Bob M. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
"Radium" wrote in message oups.com... One thing that I do like are the sharp sawtooth wave patterns that show up on FM video receivers whenever lightning strikes. When, pray tell, have you ever seen an "FM video receiver"? Bob M. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
In rec.radio.amateur.antenna Bob Myers wrote:
"Radium" wrote in message oups.com... One thing that I do like are the sharp sawtooth wave patterns that show up on FM video receivers whenever lightning strikes. When, pray tell, have you ever seen an "FM video receiver"? Bob M. Where he gets the rest of his "technology"; drug dreams. -- Jim Pennino Remove .spam.sux to reply. |
How I would like to change the cell phone industry [was AM
Radium wrote:
One thing that I do like are the sharp sawtooth wave patterns that show up on FM video receivers whenever lightning strikes. FM video receivers receive Y [luminance] signals present on FM radio waves. Electrical disturbances affect the FM video receiver causing those beautifaul zapping and buzzing sawtooth patterns on the screen. You may also enjoy listening to the dial tone while standing in a glass payphone booth. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
"Bob Myers" hath wroth:
"Radium" wrote in message roups.com... One thing that I do like are the sharp sawtooth wave patterns that show up on FM video receivers whenever lightning strikes. When, pray tell, have you ever seen an "FM video receiver"? Bob M. I have one of those FM video receivers. It's my (ancient) Wavetek 3000b communications service monitor, which displays all kinds of nifty light shows and patterns for FM. I often tune it to the WX channel and watch the modulation on the scope display. It's kinda hypnotic without the accompanying audio and sometimes an improvement over what's available on TV. I guess it's TV for radio geeks. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
"Bob Myers" hath wroth:
Wrong. Science fiction has mutated into social adventure, space opera, and historical fantasy. I haven't seen any really technical science fiction in many years. Spider Robinson. Joe Haldeman. Larry Niven. Jerry Pournelle. Ben Bova. Greg Egan. Stephen Baxter. In the interest of brevity, I won't rattle off examples of how most of those authors started out with hard technical science fiction, and ended up recently writing what amounts to "future social problems" type of sci-fi. At age 74, Ben Bova still cranks out excellent stories but seems to be very light on the technology in the last few years. Stephen Baxter is a scientist and really does well speculating on where technology is sending us. Greg Egan is a mathemagician with a rather creative view of artificial intelligence. Haldeman puts me to sleep, Niven is just plain weird, and Pournelle is too militarist for my liking. They've all done "hard" sci-fi writing, but as time progresses, seem to be writing for a much different audience, such as writing for TV or movies. That's where the space opera, social adventure (chase scenes, crash and burn, and explosions) are coming from. I still read Stephen Baxter, but none of the others. This is the first I've heard of Spider Robinson, but will give his stuff a look. Arthur C. Clarke, who, thank the FSM, is still with us and writing. Yeah, but he can certainly beat the "2001 Space Odyssey" theme to death. At 89, I'm really impressed that he's still working. However, his last few books have been co-authored by Stephen Baxter and read more like Baxter's complex writing, than Clarke's neatly clipped short lines. Ok, I'll concede the hard sci-fi hasn't gone down the tubes completely and that there are still authors catering to a technically astute audience. However, even the best of these (as you've itemized) tend to drift toward the popular media, mass market, and general audience market, which deals primarily in entertainment. This entertainment is invariably devoid of technology, lacking in a basis on physical reality, and is dominated by space opera and general idiocy. For every sci-fi author that knows his science, there are perhaps 50 that are lacking. Little wonder that space opera predominates as it requires very little technical expertise to write. Maybe that's why I like reading Mr. Radium's muddled tech rants. It's the closest approximation to science fiction I can easily find. Sure, there's an AWFUL lot of crap out there - SF, like everything else, obey's Sturgeon's Law - but the good stuff is still being written. You just have to look for it. These daze, I have to do more than look. I have to dig, excavate, and filter to find it. However, I found a suitable replacement about 10 years ago. I was reading dot com business plans. Not only was I being paid to rip them apart, but the products and services were some of the best science fiction I had ever read. The authors of some of those business plans really should be writing sci-fi stories. I really miss the passing of the dot com era and the tremendous technical imagination that helped make it happen. Reminder: None of the sci-fi authors up to about 1970, ever predicted the rise of personal computah. It was always the giant mainframe (Multivac). Some came close with remote terminals, but even those had a mainframe behind them. Oh well, can't get it right every time. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
"Jeff Liebermann" wrote in message ... When, pray tell, have you ever seen an "FM video receiver"? Bob M. I have one of those FM video receivers. It's my (ancient) Wavetek 3000b communications service monitor, which displays all kinds of nifty light shows and patterns for FM. I often tune it to the WX channel and watch the modulation on the scope display. It's kinda hypnotic without the accompanying audio and sometimes an improvement over what's available on TV. I guess it's TV for radio geeks. Somehow, though, I don't think that's quite what our boy Radium was talking about... Bob M. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
"Jeff Liebermann" wrote in message ... This is the first I've heard of Spider Robinson, but will give his stuff a look. Spider's not as "hard tech" as some of the others have been, but has been compared with Robert Heinlein in overall style. (A comparison which I am very sure he wouldn't claim himself, as RAH is a longtime hero of Spider's.) But his stuff is just an amazing amount of plain, unadulterated FUN. Try, especially, the "Callahan's Saloon" stories. Arthur C. Clarke, who, thank the FSM, is still with us and writing. Yeah, but he can certainly beat the "2001 Space Odyssey" theme to death. At 89, I'm really impressed that he's still working. However, his last few books have been co-authored by Stephen Baxter and read more like Baxter's complex writing, than Clarke's neatly clipped short lines. In my book, Clarke's earned the right to do whatever he damn well pleases at this point. And he certainly has done quite a bit besides the "2001" stuff; there's the "Rama" stories, "The Fountains of Paradise," etc...and I don't think the work with Baxter has been all that bad - you didn't like "The Light of Other Days"? Ok, I'll concede the hard sci-fi hasn't gone down the tubes completely and that there are still authors catering to a technically astute audience. However, even the best of these (as you've itemized) tend to drift toward the popular media, mass market, and general audience market, which deals primarily in entertainment. Well, as the Grand Old Man himself once noted, "Writing is like prostitution - first you do it for love, and then for a few close friends, and then for money." A writer who doesn't - or can't - write what sells won't stay around long enough to write the Important Stuff, should he or she care to do so. invariably devoid of technology, lacking in a basis on physical reality, and is dominated by space opera and general idiocy. For every sci-fi author that knows his science, there are perhaps 50 that are lacking. Little wonder that space opera predominates as it requires very little technical expertise to write. Again, though - Sturgeon's Law applies to EVERYTHING. No exceptions. Maybe that's why I like reading Mr. Radium's muddled tech rants. It's the closest approximation to science fiction I can easily find. But they sure don't seem to be grounded in anything even resembling reality. If you want hard SF, and not the sort of fantasy that makes "Star Wars" look like a physics text, you'd really have to look elsewhere. Reminder: None of the sci-fi authors up to about 1970, ever predicted the rise of personal computah. To be sure, but then, neither did anyone else. One of the nicest things about the future is that it always is full of surprises for everyone. Bob M. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
"Bob Myers" hath wroth:
"Jeff Liebermann" wrote in message .. . When, pray tell, have you ever seen an "FM video receiver"? Bob M. I have one of those FM video receivers. It's my (ancient) Wavetek 3000b communications service monitor, which displays all kinds of nifty light shows and patterns for FM. I often tune it to the WX channel and watch the modulation on the scope display. It's kinda hypnotic without the accompanying audio and sometimes an improvement over what's available on TV. I guess it's TV for radio geeks. Somehow, though, I don't think that's quite what our boy Radium was talking about... Bob M. If it's not what Mr Radium is using, it's close. Haven't you watched the typical pre-1971 science fiction movie? The arrival of any alien object or visitor is initially detected and displayed on a large CRT, usually with an unstable Lissajous pattern or trivialized radar simulation plus the requisite shrill noises and sound effects. After seeing that demonstration, I concluded that if I was going to personally greet the Galactic Ambassador from AlGore, I would need a similar alien detector or communicator. The closest approximation I could find was a communications service monitor. In order to monitor it continuously, I decided that a 15 year career in land mobile communications was required. I would leave it running continuously, waiting for the voices from outer space. Unfortunately, the ambassador is apparently distracted and I have moved on to other professions. I still own a service monitor and still turn it on waiting for the display to mark the arrival of the alien visitors. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
In rec.radio.amateur.antenna Jeff Liebermann wrote:
snip These daze, I have to do more than look. I have to dig, excavate, and filter to find it. However, I found a suitable replacement about 10 years ago. I was reading dot com business plans. Not only was I being paid to rip them apart, but the products and services were some of the best science fiction I had ever read. The authors of some of those business plans really should be writing sci-fi stories. I really miss the passing of the dot com era and the tremendous technical imagination that helped make it happen. Reminds me of a meeting held at a large, prominent aerospace company some years back where the marketing weenie was touting the latest air-to-air missle idea that would completely dominate the market. He was a bit taken aback (but not deterred, which is another story) when one of the engineers in the audience pointed out that they needed to come up with a communications system that operated about 3 times the speed of light to make it work. snip remaining -- Jim Pennino Remove .spam.sux to reply. |
How I would like to change the cell phone industry [was AM
Jeff Liebermann wrote:
. . . Maybe that's why I like reading Mr. Radium's muddled tech rants. It's the closest approximation to science fiction I can easily find. . . . Try U.S. patents. The prose style is deadly, but the descriptions of operation are very often entertainingly fictional. For a warm-up, I recommend "Hyper-Light-Speed Antenna" by David L. Strom, #6,025,810. There are many more creative ones and ones based on better pseudo-science, but that one is surely worth a read. Roy Lewallen, W7EL |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
Roy Lewallen hath wroth:
Jeff Liebermann wrote: . . . Maybe that's why I like reading Mr. Radium's muddled tech rants. It's the closest approximation to science fiction I can easily find. . . . Try U.S. patents. The prose style is deadly, but the descriptions of operation are very often entertainingly fictional. For a warm-up, I recommend "Hyper-Light-Speed Antenna" by David L. Strom, #6,025,810. http://www.google.com/patents?id=csYDAAAAEBAJ&dq=6,025,810 Cute. Apply DC and heat, and it goes faster than light. Here's my candidate for the RF hype award: "Magnetic field based power transmission line communication method and system" http://www.google.com/patents?id=N_sEAAAAEBAJ&dq=5982276 Uses a MASER with no visible means of coupling it to the power line to move 2GBits/sec. Of course, it eventually went to litigation: http://dallas.bizjournals.com/dallas/stories/2004/03/22/story5.html 6 Pages from Wired Magazine: http://www.wired.com/wired/archive/9.11/media.html The list of suckers, er.... investors, it truely impressive. I'll pretend not to mention commercial antennas that are sold without any useful specifications, patterns, or simulations. That's one reason I've often considered going into the antenna business. The more they resemble a gold plated metallic scrap heap, the better they sell. Few customers can see how they operate. Product comparisons are difficult or impossible. Magic is everywhere. Yeah, the antenna biz looks good. There are many more creative ones and ones based on better pseudo-science, but that one is surely worth a read. Roy Lewallen, W7EL Yes, but patents aren't made to be read by humans. They're made to be read and fought over by attorneys. I've also derived some entertainment from patents. For a while, I was collecting what I considered to be patented impossibilities from companies that exist mostly as a stock scam. However, I got into legal hot water when I started to publicly suggest that their patented technology was closer to science fiction than science. To avoid litigation, I've had to keep my big mouth shut. I've run into some real howlers that I would just love to offer as entertainment, but don't need or want to risk an infestation of attorneys. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
Thank you Jim. You did good, it will come around full circle, allways does!
Butch KF5DE wrote in message ... In rec.radio.amateur.antenna Radium wrote: On Jul 1, 7:24 am, wrote in http://groups.google.com/group/sci.e...0c8ed13?hl=en& : how would u like to change the cell phone industry? Analog cells phones should stop using FM and should start using AM with SHF frequencies - at least 3 GHz and at most 30 GHz. Analog cell phones are going away. Cell phones already use frequencies in the 3 GHz region. You are an idiot. snip crap -- Jim Pennino Remove .spam.sux to reply. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
On Sun, 15 Jul 2007 20:45:02 GMT, wrote in
: In rec.radio.amateur.antenna Radium wrote: On Jul 1, 7:24 am, wrote in http://groups.google.com/group/sci.e...0c8ed13?hl=en& : how would u like to change the cell phone industry? Analog cells phones should stop using FM and should start using AM with SHF frequencies - at least 3 GHz and at most 30 GHz. Analog cell phones are going away. True. Cell phones already use frequencies in the 3 GHz region. False. -- Best regards, FAQ FOR CINGULAR WIRELESS: John Navas http://en.wikibooks.org/wiki/Cingular_Wireless_FAQ |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
In rec.radio.amateur.antenna John Navas wrote:
On Sun, 15 Jul 2007 20:45:02 GMT, wrote in : In rec.radio.amateur.antenna Radium wrote: On Jul 1, 7:24 am, wrote in http://groups.google.com/group/sci.e...0c8ed13?hl=en& : how would u like to change the cell phone industry? Analog cells phones should stop using FM and should start using AM with SHF frequencies - at least 3 GHz and at most 30 GHz. Analog cell phones are going away. True. Cell phones already use frequencies in the 3 GHz region. False. 1.9 GHz is in the -region- of 3 GHz. ..8 GHz is not in the -region- of 3 GHz. -- Jim Pennino Remove .spam.sux to reply. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
On Jul 16, 7:36 pm, "Brenda Ann" wrote:
Analog satellite still uses FM, but there is very little of that left. 30MHz wide channels. Think there used to be one version of SECAM (in France, IIRC) that used FM video. That's gone now, too. Actually SECAM also uses AM for the luminance signal. However, it uses FM for the color [chroma] signal. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
On Jul 16, 6:07 pm, "NotMe" wrote:
The only FM on standard TV is the audio. Video is vestigial sideband AM. I want it to be the opposite. |
How I would like to change the cell phone industry [was AM
Jeff Liebermann wrote:
I still own a service monitor and still turn it on waiting for the display to mark the arrival of the alien visitors. No doubt waiting for the Navasites from the Shirley Maclean alternative universe...with their Extended GSM communicators. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
In article ,
Jeff Liebermann wrote: I'll pretend not to mention commercial antennas that are sold without any useful specifications, patterns, or simulations. That's one reason I've often considered going into the antenna business. The more they resemble a gold plated metallic scrap heap, the better they sell. Few customers can see how they operate. Product comparisons are difficult or impossible. Magic is everywhere. Yeah, the antenna biz looks good. I remember seeing one of those "rabbit ears" tv antennas, unpowered, shaped like a little satellite dish that you could rotate, selling for like 14.99 or something and on the box it said "Uses RF Technology!!" It was true, though, I guess. -- W. Oates |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
On Tue, 17 Jul 2007 19:13:33 -0500, DTC
wrote in : Jeff Liebermann wrote: I still own a service monitor and still turn it on waiting for the display to mark the arrival of the alien visitors. No doubt waiting for the Navasites from the Shirley Maclean alternative universe...with their Extended GSM communicators. Hint: Extended GSM is a tower feature, not a handset feature. -- Best regards, FAQ FOR CINGULAR WIRELESS: John Navas http://en.wikibooks.org/wiki/Cingular_Wireless_FAQ |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
On Wed, 18 Jul 2007 00:05:01 GMT, wrote in
: In rec.radio.amateur.antenna John Navas wrote: On Sun, 15 Jul 2007 20:45:02 GMT, wrote in Cell phones already use frequencies in the 3 GHz region. False. 1.9 GHz is in the -region- of 3 GHz. False. -- Best regards, FAQ FOR CINGULAR WIRELESS: John Navas http://en.wikibooks.org/wiki/Cingular_Wireless_FAQ |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
In rec.radio.amateur.antenna Radium wrote:
On Jul 16, 6:07 pm, "NotMe" wrote: The only FM on standard TV is the audio. Video is vestigial sideband AM. I want it to be the opposite. I want you to go away until you at least have a high school education in science and techology and learn how to use Google. I don't think either is going to happen. -- Jim Pennino Remove .spam.sux to reply. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
In rec.radio.amateur.antenna John Navas wrote:
On Wed, 18 Jul 2007 00:05:01 GMT, wrote in : In rec.radio.amateur.antenna John Navas wrote: On Sun, 15 Jul 2007 20:45:02 GMT, wrote in Cell phones already use frequencies in the 3 GHz region. False. 1.9 GHz is in the -region- of 3 GHz. False. It certainly is within about 20%. -- Jim Pennino Remove .spam.sux to reply. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
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How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
Warren Oates hath wroth:
In article , Jeff Liebermann wrote: I'll pretend not to mention commercial antennas that are sold without any useful specifications, patterns, or simulations. That's one reason I've often considered going into the antenna business. The more they resemble a gold plated metallic scrap heap, the better they sell. Few customers can see how they operate. Product comparisons are difficult or impossible. Magic is everywhere. Yeah, the antenna biz looks good. I remember seeing one of those "rabbit ears" tv antennas, unpowered, shaped like a little satellite dish that you could rotate, selling for like 14.99 or something and on the box it said "Uses RF Technology!!" I think that was the rabbit ears with the gold plated 6" dia dish antenna in the middle. http://www.radioshack.com/product/index.jsp?productId=2455309 Yep... same junk but without the gold plating. It was true, though, I guess. You missed all the fun in the late 50's. That's what got me interested in radio/RF/wireless/whatever. There was this character named Charles Torrelli, that advertised in Popular Electronics selling a "Turn your house wiring into a giant 1,000 ft TV antenna". It consisted of a Bakelite box with a "capacitator" inside. One end went to the AC power line, the other end to the twin lead input on the TV. Since there was no transformer in the box, and a good chance the at the TV was of the AC-DC variety, there was about a 10% chance that you could get fried connecting the device. Needless to say, house wiring does not make a great VHF antenna, but that didn't stop Torrelli. It also inspired me to learn a bit more about the technology as all the experts were telling me that it can't work, but none supplied any reasons that made sense. Further investigation on my part resulted in the a minor electrocution, which provided additional inspiration and motivation. I instantly concluded that anything that powerful must also be interesting and possibly useful, so I elected to study electricity. Additional inspiration was later provided by the launching of Sputnik, which converted anyone that could spell "engineering" into some kind of freedom fighter. I once modeled a Radio Shock TV yagi antenna. On some channels, it had more gain in the backwards direction than forward. A simple bow tie and reflector antenna would have worked much better, except that RS doesn't sell them any more. Also, TV antennas are not rated in dBi gain. They use "miles" instead. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
In rec.radio.amateur.antenna John Navas wrote:
On Wed, 18 Jul 2007 00:55:01 GMT, wrote in : In rec.radio.amateur.antenna John Navas wrote: On Wed, 18 Jul 2007 00:05:01 GMT, wrote in : In rec.radio.amateur.antenna John Navas wrote: On Sun, 15 Jul 2007 20:45:02 GMT, wrote in Cell phones already use frequencies in the 3 GHz region. False. 1.9 GHz is in the -region- of 3 GHz. False. It certainly is within about 20%. No radio engineer would agree. That should have been about 30%, but in any case, I am an engineer and there isn't a whole hell of a lot of anything different between 1.9 GHz and 3 GHz. What? Some trivial differences in path losses? Antennas a bit different in size by what, 4 mm unless I slipped a decimal point in my head? -- Jim Pennino Remove .spam.sux to reply. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
hath wroth:
John Navas wrote: No radio engineer would agree. I are an radio/RF/wireless/communications/whatever engineer and I agree with John Navas that cellular is nowhere near 3GHz. That should have been about 30%, but in any case, I am an engineer and there isn't a whole hell of a lot of anything different between 1.9 GHz and 3 GHz. Baloney. See: http://www.ntia.doc.gov/osmhome/allochrt.pdf http://www.fcc.gov/oet/spectrum/table/fcctable.pdf Zoom in to the area between 1.9GHz and 3.0GHz. There's a huge amount of point to point, wi-fi, WiMax, satellite, XM/Serius, radar, military, etc, stuff in that area. That's also where Sprint and others have recently purchased bandwidth for advanced data services. What? Some trivial differences in path losses? Antennas a bit different in size by what, 4 mm unless I slipped a decimal point in my head? There's no disgrace in admiting that you've made a misake. There's plenty in trying to bluster your way out of admitting it followed by trying to trivialize your mistake. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
In rec.radio.amateur.antenna Jeff Liebermann wrote:
hath wroth: John Navas wrote: No radio engineer would agree. I are an radio/RF/wireless/communications/whatever engineer and I agree with John Navas that cellular is nowhere near 3GHz. That should have been about 30%, but in any case, I am an engineer and there isn't a whole hell of a lot of anything different between 1.9 GHz and 3 GHz. Baloney. See: http://www.ntia.doc.gov/osmhome/allochrt.pdf http://www.fcc.gov/oet/spectrum/table/fcctable.pdf Zoom in to the area between 1.9GHz and 3.0GHz. There's a huge amount of point to point, wi-fi, WiMax, satellite, XM/Serius, radar, military, etc, stuff in that area. That's also where Sprint and others have recently purchased bandwidth for advanced data services. What? Some trivial differences in path losses? Antennas a bit different in size by what, 4 mm unless I slipped a decimal point in my head? There's no disgrace in admiting that you've made a misake. There's plenty in trying to bluster your way out of admitting it followed by trying to trivialize your mistake. I agree there is a lot of stuff allocated between 1.9 GHz and 3 GHz, but FCC regulations wasn't the point. Lemme try again. Put up two transmitters with everything identical in terms of lambda, one on 1.9 GHz, one on 3 GHz. Run around all you want with a field strength meter. There isn't going to be spit worth of difference. Antenna sizes? A matter of millimeters. Equipment construction techniques, part availability, etc? Negligable differences. There isn't much difference between 2 GHz radio and 3 GHz radio. Do the above with 800 MHz and 3 GHz. Now you start seeing some differences. -- Jim Pennino Remove .spam.sux to reply. |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
In article ,
Jeff Liebermann wrote: I think that was the rabbit ears with the gold plated 6" dia dish antenna in the middle. http://www.radioshack.com/product/index.jsp?productId=2455309 Yep... same junk but without the gold plating. It looked like that one, if wasn't amplified though. -- W. Oates |
How I would like to change the cell phone industry [was AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency]
- S N I P -
RADIUM, The please keep 'your' OT crap! OFF of Rec.Radio.Shortwave * The Theard Goes Where The Thread Goes * That Is The Nature Of NewsGroups - I had to start a new thread because some - jerks decided to post irrelevant nonsense. Relevance in in the Mind of the Poster. Right now since the 'topic' is CellPhones - I makes me wonder what kind of Cellphone and Service Provider others here may have . . . OK starting with me : I have a Motorla RAZR V3 via AT&T {Cingular} Wireless and I do not want any changes to the Cellphone Broadcasting System [.] Keep Posting Your Scientific and Cellphone BS to Rec.Radio.Shortwave and you will see replying to it with what ever comes into my mind and inviting others hear to do the same. However, leave Rec.Radio.Shortwave "Off" your Cross-Posting List and you won't have to deal with me. Now woldn't that be nice. Say Cuhulin do you have a CellPhone ? David I know you must have a Cellphone. Bet-Ya Telamon has a Cellphone. Wondering -if- DX Ace has a Cellphone ? Burr way over in the PI - you got a Cellphone over there ? Hey Back At You "Radium" Wondering . . . You Gotta Cellphone and who is your Service Provider ? IF YOU GOT A CELLPHONE LET RADIUM HEAR ABOUT IT ! I B 'rhf' Listening to my Shortwave Radio with my Cellphone near-by bye bye ~ RHF |
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