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#1
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My posts havent been gittin through fer some reason so I'm gonna
repost this one. For ppl who really want to stay connected while afloat ( I dunno why but they do). Useless Idea #3734 Put a T in the output of your VHF so your cellphone can be connected to your VHF antenna waaaaaaaaay up thar on your mast. Since your 900 Mhz cellphone is even more line-of-sight than vhf, this will give you more more coverage when you are a few miles out. In this case, I expect coverage will then be limited by cellphone power instead of by not being able to see a tower. I would expect to be able to get coverage from 15 miles out. I once experimented, while standing on my cabin top, I was able to use my cell phone while being 6 miles offshore. Would a cell phone booster be illegal? |
#2
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Parallax wrote:
My posts havent been gittin through fer some reason so I'm gonna repost this one. For ppl who really want to stay connected while afloat ( I dunno why but they do). Useless Idea #3734 Put a T in the output of your VHF so your cellphone can be connected to your VHF antenna waaaaaaaaay up thar on your mast. Since your 900 Mhz cellphone is even more line-of-sight than vhf, this will give you more more coverage when you are a few miles out. In this case, I expect coverage will then be limited by cellphone power instead of by not being able to see a tower. I would expect to be able to get coverage from 15 miles out. I once experimented, while standing on my cabin top, I was able to use my cell phone while being 6 miles offshore. Would a cell phone booster be illegal? Don't key the VHF if the cell phone is plugged in! In fact, it might not be a good idea have the VHF on or connected. Doubt it'll help much, if at all. There was a good thread maybe a year ago about boosting cellphone distances. There are both directional antennas and power boosters. Do a google on Cell phone antennas, as I recall. -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
#3
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#4
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Why don't you just get a cell phone antenna and if needed, an amplifier? With a 4 foot
antenna on the stern rail we had contact with ATT for the entire East Coast. The only problem area was Maine, where the coves can be blocked by hills. BTW, one of the proposals for "next generation" cell technology was by a company that specializes in small supercomputers for Defense Dept. radar and sonar systems. The same technology that can "aim" radar can be used to aim cell bandwidth to the customer that needs it at the moment. "Parallax" wrote in message om... (Parallax) wrote in message . com... My posts havent been gittin through fer some reason so I'm gonna repost this one. For ppl who really want to stay connected while afloat ( I dunno why but they do). Useless Idea #3734 Put a T in the output of your VHF so your cellphone can be connected to your VHF antenna waaaaaaaaay up thar on your mast. Since your 900 Mhz cellphone is even more line-of-sight than vhf, this will give you more more coverage when you are a few miles out. In this case, I expect coverage will then be limited by cellphone power instead of by not being able to see a tower. I would expect to be able to get coverage from 15 miles out. I once experimented, while standing on my cabin top, I was able to use my cell phone while being 6 miles offshore. Would a cell phone booster be illegal? OK, an even worse idea.......Use your radar (I dont have one) as a high gain antenna to point toward a cell tower. It ought to work for 900 Mhz. Some electronics could figger out the direction to the best tower. |
#5
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On Tue, 28 Oct 2003 09:02:16 -0500, "Jeff Morris"
jeffmo@NoSpam-sv-lokiDOTcom wrote (with possible editing): Why don't you just get a cell phone antenna and if needed, an amplifier? With a 4 foot antenna on the stern rail we had contact with ATT for the entire East Coast. The only problem area was Maine, where the coves can be blocked by hills. BTW, one of the proposals for "next generation" cell technology was by a company that specializes in small supercomputers for Defense Dept. radar and sonar systems. The same technology that can "aim" radar can be used to aim cell bandwidth to the customer that needs it at the moment. ....snip Actually, what might make more sense are the new satellite cell phones. I believe they go for around $600, but the per-minute charge is down to around $0.35 and they're good just about anywhere. -- Larry Email to rapp at lmr dot com |
#6
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That's the dumbest thing I've seen in a long time!.....and will
destroy BOTH radio and cellphone....DON'T DO IT! 1 - Antenna will not transmit 800 or 1900 Mhz..... 2 - The transmitter of one radio transmits into the RECEIVER of the other, destroying its sensitive input amplifier. 3 - The transmitters, themselves, will be operating into such a complex impedance, it may take out the output amp in the transmitter, too! NO GO....... Don't feel pregnant, though. Today I was helping someone troubleshoot their electrical problems on a motor yacht. I casually asked him why his battery charger was connected to his 2000W AC inverter. Without missing a beat and totally serious, he told me that was to keep his battery charged when he was at anchor away from the dock....... Ever seen a perpetual motion machine?.....(c; I just said, "Oh, I see.".....thinking about how I was gonna get away from this boat before I found its exhaust riser plugged into the diesel intakes to conserve air...... Sure hope his head doesn't pump into the fresh water tank....hee hee. The inverter had plenty of power to run the 30A battery charger plugged into it, though.....(c; On 27 Oct 2003 15:39:00 -0800, (Parallax) wrote: My posts havent been gittin through fer some reason so I'm gonna repost this one. For ppl who really want to stay connected while afloat ( I dunno why but they do). Useless Idea #3734 Put a T in the output of your VHF so your cellphone can be connected to your VHF antenna waaaaaaaaay up thar on your mast. Since your 900 Mhz cellphone is even more line-of-sight than vhf, this will give you more more coverage when you are a few miles out. In this case, I expect coverage will then be limited by cellphone power instead of by not being able to see a tower. I would expect to be able to get coverage from 15 miles out. I once experimented, while standing on my cabin top, I was able to use my cell phone while being 6 miles offshore. Would a cell phone booster be illegal? Larry W4CSC "Very funny, Scotty! Now, BEAM ME MY CLOTHES! KIRK OUT!" |
#7
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#9
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#10
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1 On Tue, 28 Oct 2003 16:18:57 -0500, Rodney Myrvaagnes wrote: On 28 Oct 2003 05:05:13 -0800, (Parallax) wrote: I never said I had good ideas. However, I realize that somehow you better disconnect the connection when the VHF or radar is used. I also forgot about impedance matching (my god, alzheimers, I taught an engineering lab on impedance matching once). I really don't know how a radar antenna works on small boats. If it is just a rotating dish, it oughta work with the right transducer. The kind with a dome has a printed-circuit board with an array of little antenna elements with fixed phase relationship that produces the beam and receives the echoes. The open ones are slotted wave guides AFIK. I don't see how either would help a cell phone. If they were the right freq, it would work, at least the antenna part. Still have to deal with impedence issues. The slotted wavguide type, are called "Alford" antenna's and they basically act like an array of verticle dipoles. Except they are horizontally polarized. The PCB looking ones, are microstrip patch arrays. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (GNU/Linux) iD8DBQE/n1Ghd90bcYOAWPYRAl2zAJ4qlPPEVjtuT9JC8Vvu49wI6E/ycgCfV7J4 F2dRPD5SOoPUGOU0TpBs5fY= =vosS -----END PGP SIGNATURE----- -- Jim Richardson http://www.eskimo.com/~warlock Think for yourselves and allow others the privilege to do the same. - Voltare |