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Dipole question
Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I
noticed there are numerous versions. The vertical is out for obvious reasons. So there are inverted and horizontal. Is there any version I am better off using barefoot? Vinnie S. |
On Thu, 13 Jan 2005 11:50:35 -0500, Vinnie S.
wrote: Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I noticed there are numerous versions. The vertical is out for obvious reasons. So there are inverted and horizontal. Is there any version I am better off using barefoot? Vinnie S. The only obvious answer is to use an outside antenna even if it's a 18" mobile antenna mounted on a gutter. Use a disguised antenna if need be. Having a inside antenna is problematic and is job specific as to whether it will perform satisfactorily. |
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My recommendation is that you don't put the dipole in the attic. The
dipole is a great antenna but any antenna will take severe losses trying to penetrate the solid walls of the attic. You will get the best performance for everyday talking is with the dipole vertical... and in free space. Professor www.telstar-electronics.com Vinnie S. wrote: Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I noticed there are numerous versions. The vertical is out for obvious reasons. So there are inverted and horizontal. Is there any version I am better off using barefoot? Vinnie S. |
On Thu, 13 Jan 2005 11:50:35 -0500, Vinnie S.
wrote in : Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I noticed there are numerous versions. The vertical is out for obvious reasons. So there are inverted and horizontal. Is there any version I am better off using barefoot? Vinnie S. Barefoot or not, an attic is probably the worst place to put an antenna. You have all kinds of possible problems, not the least of which is house wiring or foil-backed insulation that can cause reflections (high SWR). There is also the issue of polarity. Almost all mobile CB antennas are vertical so don't expect strong signals from a horizontal antenna, or even an inverted-V which is largely horizontal. You might get some skip but that depends a lot on the position of the antenna -- you might have to rotate your house to align yourself with the traffic. I would think your best solution is to buy a cheap antenna tuner and load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum siding, chain-link fence, steel shed..... whatever works best. ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- |
On Thu, 13 Jan 2005 11:50:35 -0500 Vinnie S. wrote:
Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I noticed there are numerous versions. The vertical is out for obvious reasons. So there are inverted and horizontal. Is there any version I am better off using barefoot? Vinnie S. How about a fiberglass marine antenna which requires no ground plane? Or just as well, a 4ft fiberglass with a piece of metal for the ground effect. Being indoors or out, makes little difference. It's what is covering the antenna that makes the difference. |
On Thu, 13 Jan 2005 16:56:41 -0800, Frank Gilliland
wrote: On Thu, 13 Jan 2005 11:50:35 -0500, Vinnie S. wrote in : Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I noticed there are numerous versions. The vertical is out for obvious reasons. So there are inverted and horizontal. Is there any version I am better off using barefoot? Vinnie S. Barefoot or not, an attic is probably the worst place to put an antenna. You have all kinds of possible problems, not the least of which is house wiring or foil-backed insulation that can cause reflections (high SWR). Only one AC romex wire going thru. No foil on insulation. Standard rafter and plywood sheating. There is also the issue of polarity. Almost all mobile CB antennas are vertical so don't expect strong signals from a horizontal antenna, or even an inverted-V which is largely horizontal. You might get some skip but that depends a lot on the position of the antenna -- you might have to rotate your house to align yourself with the traffic. I would think your best solution is to buy a cheap antenna tuner and load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum siding, chain-link fence, steel shed..... whatever works best. I am going to have to think about this. I really wanted a temporary solution until I can hand one on the tree. Vinnie S. |
On Thu, 13 Jan 2005 18:58:40 -0600, "Richard" wrote:
On Thu, 13 Jan 2005 11:50:35 -0500 Vinnie S. wrote: Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I noticed there are numerous versions. The vertical is out for obvious reasons. So there are inverted and horizontal. Is there any version I am better off using barefoot? Vinnie S. How about a fiberglass marine antenna which requires no ground plane? Or just as well, a 4ft fiberglass with a piece of metal for the ground effect. Being indoors or out, makes little difference. It's what is covering the antenna that makes the difference. Well, there is this. Essentially, it's a 5 foot 5/8 wave Firestik, but the radials are rather short 30". Shouldn't the be like 9ft? http://www.firestik.com/Catalog/IBA5.htm Again, I only want this for a temporary solution. Vinnie S. |
On 13 Jan 2005 16:54:29 -0800, "Professor" wrote:
My recommendation is that you don't put the dipole in the attic. The dipole is a great antenna but any antenna will take severe losses trying to penetrate the solid walls of the attic. You will get the best performance for everyday talking is with the dipole vertical... and in free space. Professor www.telstar-electronics.com What if I do this up a tree, instead of a 5/8 GP. Mind you, I will need about 100-150 of coax to run it to the tree. Vinnie S. |
On Thu, 13 Jan 2005 16:56:41 -0800, Frank Gilliland
wrote: On Thu, 13 Jan 2005 11:50:35 -0500, Vinnie S. wrote in : Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I noticed there are numerous versions. The vertical is out for obvious reasons. So there are inverted and horizontal. Is there any version I am better off using barefoot? Vinnie S. Barefoot or not, an attic is probably the worst place to put an antenna. You have all kinds of possible problems, not the least of which is house wiring or foil-backed insulation that can cause reflections (high SWR). There is also the issue of polarity. Almost all mobile CB antennas are vertical so don't expect strong signals from a horizontal antenna, or even an inverted-V which is largely horizontal. You might get some skip but that depends a lot on the position of the antenna -- you might have to rotate your house to align yourself with the traffic. I would think your best solution is to buy a cheap antenna tuner and load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum siding, chain-link fence, steel shed..... whatever works best. Vinnie; You said you lived on a ranch? Use Franks tuner idea, run a wire out the window and tie the other end to a fence post, your wifes clothes line pole or anything else above eye level. |
On Fri, 14 Jan 2005 01:45:00 GMT, Lancer wrote:
Barefoot or not, an attic is probably the worst place to put an antenna. You have all kinds of possible problems, not the least of which is house wiring or foil-backed insulation that can cause reflections (high SWR). There is also the issue of polarity. Almost all mobile CB antennas are vertical so don't expect strong signals from a horizontal antenna, or even an inverted-V which is largely horizontal. You might get some skip but that depends a lot on the position of the antenna -- you might have to rotate your house to align yourself with the traffic. I would think your best solution is to buy a cheap antenna tuner and load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum siding, chain-link fence, steel shed..... whatever works best. Vinnie; You said you lived on a ranch? Use Franks tuner idea, run a wire out the window and tie the other end to a fence post, your wifes clothes line pole or anything else above eye level. I don't have a clothesline. I am thinking about running it vertical up a tree, but would have to trench the coax. Also, I have ground hogs, moles, and rabbits everywhere. Won't they chew up the coax? Vinnie S. |
On 13 Jan 2005 16:54:29 -0800, "Professor" wrote:
My recommendation is that you don't put the dipole in the attic. The dipole is a great antenna but any antenna will take severe losses trying to penetrate the solid walls of the attic. You will get the best performance for everyday talking is with the dipole vertical... and in free space. Professor www.telstar-electronics.com What if I do this up a tree, instead of a 5/8 GP. Mind you, I will need about 100-150 of coax to run it to the tree. Vinnie S. 150 feet from the house to the tree? Vinnie forget about burying coax. Forget about a dipole. Forget the frigging tree already. Slap a mobile magmount antenna on a garbage can outside your window and call it a day. Or get an Antron and stick it on a pipe next to the house. Or on the roof like normal cbers do. And dont let me catch you keyclowning with this setup LOL |
On Thu, 13 Jan 2005 21:09:37 -0500, Vinnie S.
wrote in : On Fri, 14 Jan 2005 01:45:00 GMT, Lancer wrote: Barefoot or not, an attic is probably the worst place to put an antenna. You have all kinds of possible problems, not the least of which is house wiring or foil-backed insulation that can cause reflections (high SWR). There is also the issue of polarity. Almost all mobile CB antennas are vertical so don't expect strong signals from a horizontal antenna, or even an inverted-V which is largely horizontal. You might get some skip but that depends a lot on the position of the antenna -- you might have to rotate your house to align yourself with the traffic. I would think your best solution is to buy a cheap antenna tuner and load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum siding, chain-link fence, steel shed..... whatever works best. Vinnie; You said you lived on a ranch? Use Franks tuner idea, run a wire out the window and tie the other end to a fence post, your wifes clothes line pole or anything else above eye level. I don't have a clothesline. I am thinking about running it vertical up a tree, but would have to trench the coax. You wouldn't even need coax. Just hook the tuner right to the radio, ground the radio, and run a single wire out the wall (through an insulator) to any large metal object you can find, attached to your house or not. I like metal drip-strips because they circle the entire roof and make dandy antennas for quick-n-dirty installations. The problem with a horizontal dipole, as I mentioned before, is the polarity of the antenna. Most CB antennas are vertical, and if your's is horizontal you won't hear very many people and they won't hear you. So if you are determined to use the attic, find the tallest mobile antenna that will fit straight up in your attic and bolt it to the floor. Then make a ground plane by running many wires out in every direction, and as far as you have the space (or wire). Connect the antenna to the center of the coax, and the ground plane to the shield. If everything goes well your SWR should be around 1.5:1 to 2:1, which is fine because you won't be able to get it any lower without losing signal. Also, I have ground hogs, moles, and rabbits everywhere. Won't they chew up the coax? If you leave them on or under the ground, yep. ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- |
On Thu, 13 Jan 2005 21:09:37 -0500, Vinnie S.
wrote in : On Fri, 14 Jan 2005 01:45:00 GMT, Lancer wrote: Barefoot or not, an attic is probably the worst place to put an antenna. You have all kinds of possible problems, not the least of which is house wiring or foil-backed insulation that can cause reflections (high SWR). There is also the issue of polarity. Almost all mobile CB antennas are vertical so don't expect strong signals from a horizontal antenna, or even an inverted-V which is largely horizontal. You might get some skip but that depends a lot on the position of the antenna -- you might have to rotate your house to align yourself with the traffic. I would think your best solution is to buy a cheap antenna tuner and load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum siding, chain-link fence, steel shed..... whatever works best. Vinnie; You said you lived on a ranch? Use Franks tuner idea, run a wire out the window and tie the other end to a fence post, your wifes clothes line pole or anything else above eye level. I don't have a clothesline. I am thinking about running it vertical up a tree, but would have to trench the coax. You wouldn't even need coax. Just hook the tuner right to the radio, ground the radio, and run a single wire out the wall (through an insulator) to any large metal object you can find, attached to your house or not. I like metal drip-strips because they circle the entire roof and make dandy antennas for quick-n-dirty installations. The problem with a horizontal dipole, as I mentioned before, is the polarity of the antenna. Most CB antennas are vertical, and if your's is horizontal you won't hear very many people and they won't hear you. Vinnie, don't use a tuner if you don't know WTF you're doing, you'll be constantly throwing carriers yelling AAUDDIOO whistling into the mike trying to get 1:1, a real pain in the ass for anyone trying to use the CB in your area. Forget about radials in the attic, you'll screw it up, stop trying to get cute, JUST BUY A NORMAL CB ANTENNA AND PUT IT OUTSIDE, YOU F-ING MAROON. |
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Frank Gilliland wrote:
On Thu, 13 Jan 2005 21:09:37 -0500, Vinnie S. wrote in : Also, I have ground hogs, moles, and rabbits everywhere. Won't they chew up the coax? If you leave them on or under the ground, yep. Then the varmints will sleep with the fish! Hey Enzo, long time. Don't tell me your new place has one of those busy body anti antenna rules!? |
Frank Gilliland wrote:
On Fri, 14 Jan 2005 05:18:49 GMT, wrote in : snip Vinnie, don't use a tuner if you don't know WTF you're doing, The guy want's the most bang for his buck, and he can do that with an antenna tuner. It will probably cost him a whole $20 and it doesn't take a college degree to operate -- jeez, it's only three knobs. And even if you don't know what you are doing you can usually fiddle with it long enough to tune in a good match to just about anything, even a bed spring. you'll be constantly throwing carriers yelling AAUDDIOO whistling into the mike trying to get 1:1, a real pain in the ass for anyone trying to use the CB in your area. Forget about radials in the attic, you'll screw it up, stop trying to get cute, JUST BUY A NORMAL CB ANTENNA AND PUT IT OUTSIDE, YOU F-ING MAROON. If you get that upset about such a trivial issue then maybe you should look for a stress management support group in your area. The ****nut uses aol, internet for cock sucking retards. |
Frank Gilliland wrote:
On Fri, 14 Jan 2005 07:21:36 GMT, wrote in : On Fri, 14 Jan 2005 05:18:49 GMT, wrote in : snip Vinnie, don't use a tuner if you don't know WTF you're doing, The guy want's the most bang for his buck, and he can do that with an antenna tuner. It will probably cost him a whole $20 and it doesn't take a college degree to operate -- jeez, it's only three knobs. And even if you don't know what you are doing you can usually fiddle with it long enough to tune in a good match to just about anything, even a bed spring. you'll be constantly throwing carriers yelling AAUDDIOO whistling into the mike trying to get 1:1, a real pain in the ass for anyone trying to use the CB in your area. Forget about radials in the attic, you'll screw it up, stop trying to get cute, JUST BUY A NORMAL CB ANTENNA AND PUT IT OUTSIDE, YOU F-ING MAROON. If you get that upset about such a trivial issue then maybe you should look for a stress management support group in your area. Antenna tuner loading his rain gutters? Chances are good he'll be into all the electronic devices in his house. That's a crock of **** and you know it. OK, he doesn't live in a house, it's a RANCH, so all his cowboy buddies in the bunkhouse will hear him on their TVs and stereos. It'll get into the phones too. Maybe it will get into your pants and relieve the pressure on your brain. Hehe, aol boi lives in a washing machine box so the concept of a ranch stlye home goes right over his pinhead. |
On 14 Jan 2005 11:11:27 GMT, Steveo wrote:
Frank Gilliland wrote: On Thu, 13 Jan 2005 21:09:37 -0500, Vinnie S. wrote in : Also, I have ground hogs, moles, and rabbits everywhere. Won't they chew up the coax? If you leave them on or under the ground, yep. Then the varmints will sleep with the fish! Hey Enzo, long time. Don't tell me your new place has one of those busy body anti antenna rules!? Hey there. Moped ! No, no probelm with that, but I am too damn low. I wanted to go up a tree and get as close to 40 feet as possible. This is a temp setup. I don't watch TV anymore, except the news and sports, and some discovery channel. I might do a firestik with a GP like Frank suggested. When the weather warms, I wil be able to go up a tree. Vinnie S. |
On Fri, 14 Jan 2005 07:21:36 GMT, wrote:
On Fri, 14 Jan 2005 05:18:49 GMT, wrote in : snip Vinnie, don't use a tuner if you don't know WTF you're doing, The guy want's the most bang for his buck, and he can do that with an antenna tuner. It will probably cost him a whole $20 and it doesn't take a college degree to operate -- jeez, it's only three knobs. And even if you don't know what you are doing you can usually fiddle with it long enough to tune in a good match to just about anything, even a bed spring. you'll be constantly throwing carriers yelling AAUDDIOO whistling into the mike trying to get 1:1, a real pain in the ass for anyone trying to use the CB in your area. Forget about radials in the attic, you'll screw it up, stop trying to get cute, JUST BUY A NORMAL CB ANTENNA AND PUT IT OUTSIDE, YOU F-ING MAROON. If you get that upset about such a trivial issue then maybe you should look for a stress management support group in your area. Antenna tuner loading his rain gutters? Chances are good he'll be into all the electronic devices in his house. OK, he doesn't live in a house, it's a RANCH, so all his cowboy buddies in the bunkhouse will hear him on their TVs and stereos. Where do you think I live? It'll get into the phones too. And if he starts keyclowning with that setup it'll be 100 times worse. What's wrong with a NORMAL cb antenna designed for plug and play? Get him messing with RF grounds and radials and such and he's headed for disaster. I predict. Which part of "running barefoot", did you not understand? Vinnie S. |
On Thu, 13 Jan 2005 22:53:25 -0800, Frank Gilliland
wrote: On Fri, 14 Jan 2005 05:18:49 GMT, wrote in : snip Vinnie, don't use a tuner if you don't know WTF you're doing, The guy want's the most bang for his buck, and he can do that with an antenna tuner. It will probably cost him a whole $20 and it doesn't take a college degree to operate -- jeez, it's only three knobs. And even if you don't know what you are doing you can usually fiddle with it long enough to tune in a good match to just about anything, even a bed spring. you'll be constantly throwing carriers yelling AAUDDIOO whistling into the mike trying to get 1:1, a real pain in the ass for anyone trying to use the CB in your area. Forget about radials in the attic, you'll screw it up, stop trying to get cute, JUST BUY A NORMAL CB ANTENNA AND PUT IT OUTSIDE, YOU F-ING MAROON. Geez. This guy needs Dr. Phil. If he gets ****ed off about this, I'd hate to be his wife or his kids. Vinnie S. |
On Thu, 13 Jan 2005 20:24:21 -0800, Frank Gilliland
wrote: On Thu, 13 Jan 2005 21:09:37 -0500, Vinnie S. wrote in : On Fri, 14 Jan 2005 01:45:00 GMT, Lancer wrote: Barefoot or not, an attic is probably the worst place to put an antenna. You have all kinds of possible problems, not the least of which is house wiring or foil-backed insulation that can cause reflections (high SWR). There is also the issue of polarity. Almost all mobile CB antennas are vertical so don't expect strong signals from a horizontal antenna, or even an inverted-V which is largely horizontal. You might get some skip but that depends a lot on the position of the antenna -- you might have to rotate your house to align yourself with the traffic. I would think your best solution is to buy a cheap antenna tuner and load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum siding, chain-link fence, steel shed..... whatever works best. Vinnie; You said you lived on a ranch? Use Franks tuner idea, run a wire out the window and tie the other end to a fence post, your wifes clothes line pole or anything else above eye level. I don't have a clothesline. I am thinking about running it vertical up a tree, but would have to trench the coax. You wouldn't even need coax. Just hook the tuner right to the radio, ground the radio, and run a single wire out the wall (through an insulator) to any large metal object you can find, attached to your house or not. I like metal drip-strips because they circle the entire roof and make dandy antennas for quick-n-dirty installations. The problem with a horizontal dipole, as I mentioned before, is the polarity of the antenna. Most CB antennas are vertical, and if your's is horizontal you won't hear very many people and they won't hear you. So if you are determined to use the attic, find the tallest mobile antenna that will fit straight up in your attic and bolt it to the floor. Then make a ground plane by running many wires out in every direction, and as far as you have the space (or wire). Connect the antenna to the center of the coax, and the ground plane to the shield. If everything goes well your SWR should be around 1.5:1 to 2:1, which is fine because you won't be able to get it any lower without losing signal. If I use a Firestik, which are usually top-loaded, and connect it to some 9 ft. piping that I can use as radials (in a crossing pattern), and ground them to a grounding rod, would that work? Also, I have ground hogs, moles, and rabbits everywhere. Won't they chew up the coax? If you leave them on or under the ground, yep. I guess I am going to have PVC conduit the coax then. I don't have a choice. Vinnie S. |
Vinnie S. wrote:
On 14 Jan 2005 11:11:27 GMT, Steveo wrote: Frank Gilliland wrote: On Thu, 13 Jan 2005 21:09:37 -0500, Vinnie S. wrote in : Also, I have ground hogs, moles, and rabbits everywhere. Won't they chew up the coax? If you leave them on or under the ground, yep. Then the varmints will sleep with the fish! Hey Enzo, long time. Don't tell me your new place has one of those busy body anti antenna rules!? Hey there. Moped ! No, no probelm with that, but I am too damn low. I wanted to go up a tree and get as close to 40 feet as possible. This is a temp setup. I don't watch TV anymore, except the news and sports, and some discovery channel. I might do a firestik with a GP like Frank suggested. When the weather warms, I wil be able to go up a tree. Vinnie S. How about a telescopic mast, they range up to 50 feet. Cement it in the ground next to the house and attach it at the peak. You will need to guy wire it too if you fully extend it. What's nice about that set-up is you can stand on the roof to work on the antenna, then raise it back up when you're done. Were you thinking of going higher than 50'above grade? Mrs. Enzo is gonna kick your ass when she sees this monstrosity next to your new house! :) |
On 14 Jan 2005 14:40:43 GMT, Steveo wrote:
I think Mrs. Enzo will get ****ed. Hiding it out in the trees would be great. Plus I don't know if there are any local ordinances regarding a mast. Frank presented another problem. The damn Ground hogs, moles, squirrels, will eat my coax. Vinnie S. |
Vinnie S. wrote:
On 14 Jan 2005 14:40:43 GMT, Steveo wrote: I think Mrs. Enzo will get ****ed. Hiding it out in the trees would be great. Plus I don't know if there are any local ordinances regarding a mast. Best to ask first. Frank presented another problem. The damn Ground hogs, moles, squirrels, will eat my coax. Hit em' with a kill'-o-watt as paybacks! :D |
"Vinnie S." wrote in message ... On Thu, 13 Jan 2005 18:58:40 -0600, "Richard" wrote: On Thu, 13 Jan 2005 11:50:35 -0500 Vinnie S. wrote: Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I noticed there are numerous versions. The vertical is out for obvious reasons. So there are inverted and horizontal. Is there any version I am better off using barefoot? Vinnie S. How about a fiberglass marine antenna which requires no ground plane? Or just as well, a 4ft fiberglass with a piece of metal for the ground effect. Being indoors or out, makes little difference. It's what is covering the antenna that makes the difference. Well, there is this. Essentially, it's a 5 foot 5/8 wave Firestik, but the radials are rather short 30". Shouldn't the be like 9ft? http://www.firestik.com/Catalog/IBA5.htm Again, I only want this for a temporary solution. Vinnie S. Yeah that should work decent as a temp antenna. Since it has the ground plane rods built in. Since it's 5ft, that means it's coil loaded. Hence, the 30". Just don't expect to get the mileage out of it as a bigger antenna would get. |
"Vinnie S." wrote in message ... On Thu, 13 Jan 2005 20:24:21 -0800, Frank Gilliland wrote: On Thu, 13 Jan 2005 21:09:37 -0500, Vinnie S. wrote in : On Fri, 14 Jan 2005 01:45:00 GMT, Lancer wrote: Barefoot or not, an attic is probably the worst place to put an antenna. You have all kinds of possible problems, not the least of which is house wiring or foil-backed insulation that can cause reflections (high SWR). There is also the issue of polarity. Almost all mobile CB antennas are vertical so don't expect strong signals from a horizontal antenna, or even an inverted-V which is largely horizontal. You might get some skip but that depends a lot on the position of the antenna -- you might have to rotate your house to align yourself with the traffic. I would think your best solution is to buy a cheap antenna tuner and load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum siding, chain-link fence, steel shed..... whatever works best. Vinnie; You said you lived on a ranch? Use Franks tuner idea, run a wire out the window and tie the other end to a fence post, your wifes clothes line pole or anything else above eye level. I don't have a clothesline. I am thinking about running it vertical up a tree, but would have to trench the coax. You wouldn't even need coax. Just hook the tuner right to the radio, ground the radio, and run a single wire out the wall (through an insulator) to any large metal object you can find, attached to your house or not. I like metal drip-strips because they circle the entire roof and make dandy antennas for quick-n-dirty installations. The problem with a horizontal dipole, as I mentioned before, is the polarity of the antenna. Most CB antennas are vertical, and if your's is horizontal you won't hear very many people and they won't hear you. So if you are determined to use the attic, find the tallest mobile antenna that will fit straight up in your attic and bolt it to the floor. Then make a ground plane by running many wires out in every direction, and as far as you have the space (or wire). Connect the antenna to the center of the coax, and the ground plane to the shield. If everything goes well your SWR should be around 1.5:1 to 2:1, which is fine because you won't be able to get it any lower without losing signal. If I use a Firestik, which are usually top-loaded, and connect it to some 9 ft. piping that I can use as radials (in a crossing pattern), and ground them to a grounding rod, would that work? Also, I have ground hogs, moles, and rabbits everywhere. Won't they chew up the coax? If you leave them on or under the ground, yep. I guess I am going to have PVC conduit the coax then. I don't have a choice. Vinnie S. I use Davis RF bury-Flex, No critters chewing on it yet! And I gots lots of critters :) This goes to an Imax2000 http://www.davisrf.com/ham1/coax.htm#buryflex I have a standard run (not buried) of RG213 going to a dipole in the trees, still no knawing, been there for a year. Chad |
On Fri, 14 Jan 2005 10:53:56 -0600, "Chad Wahls" wrote:
I guess I am going to have PVC conduit the coax then. I don't have a choice. Vinnie S. I use Davis RF bury-Flex, No critters chewing on it yet! And I gots lots of critters :) This goes to an Imax2000 http://www.davisrf.com/ham1/coax.htm#buryflex I have a standard run (not buried) of RG213 going to a dipole in the trees, still no knawing, been there for a year. Chad http://www.eham.net/reviews/detail/858 Thanks. It got great reviews. Vinnie S. |
Frank Gilliland wrote:
On Fri, 14 Jan 2005 05:18:49 GMT, wrote in : snip Vinnie, don't use a tuner if you don't know WTF you're doing, The guy want's the most bang for his buck, and he can do that with an antenna tuner. It will probably cost him a whole $20 and it doesn't take a college degree to operate -- jeez, it's only three knobs. And even if you don't know what you are doing you can usually fiddle with it long enough to tune in a good match to just about anything, even a bed spring. you'll be constantly throwing carriers yelling AAUDDIOO whistling into the mike trying to get 1:1, a real pain in the ass for anyone trying to use the CB in your area. Forget about radials in the attic, you'll screw it up, stop trying to get cute, JUST BUY A NORMAL CB ANTENNA AND PUT IT OUTSIDE, YOU F-ING MAROON. If you get that upset about such a trivial issue then maybe you should look for a stress management support group in your area. The ****nut uses aol, internet for cock sucking retards. Notice who started with the gay **** right away -- steveo, he's an angry little man LLOL |
On 14 Jan 2005 14:40:43 GMT, Steveo wrote:
I think Mrs. Enzo will get ****ed. Hiding it out in the trees would be great. Plus I don't know if there are any local ordinances regarding a mast. Frank presented another problem. The damn Ground hogs, moles, squirrels, will eat my coax. Vinnie S. Vinnie, Frank, pay attention. He is going to do a buried 150 ft coax run to the tree, right? What's the velocity factor of RG8 or of the coax he will use? Do the math, how much of his 4w out will reach the antenna? He claims he isnt gonna keyclown, but I think he's lying. |
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On Fri, 14 Jan 2005 07:21:36 GMT, wrote in
: On Fri, 14 Jan 2005 05:18:49 GMT, wrote in : snip Vinnie, don't use a tuner if you don't know WTF you're doing, The guy want's the most bang for his buck, and he can do that with an antenna tuner. It will probably cost him a whole $20 and it doesn't take a college degree to operate -- jeez, it's only three knobs. And even if you don't know what you are doing you can usually fiddle with it long enough to tune in a good match to just about anything, even a bed spring. you'll be constantly throwing carriers yelling AAUDDIOO whistling into the mike trying to get 1:1, a real pain in the ass for anyone trying to use the CB in your area. Forget about radials in the attic, you'll screw it up, stop trying to get cute, JUST BUY A NORMAL CB ANTENNA AND PUT IT OUTSIDE, YOU F-ING MAROON. If you get that upset about such a trivial issue then maybe you should look for a stress management support group in your area. Antenna tuner loading his rain gutters? Chances are good he'll be into all the electronic devices in his house. That's a crock of **** and you know it. Yeah, but it's only a partial crock of ****. The rain gutters or wire or whatever are only half the dipole so the house wiring will become the other active half and they will radiate. He grounds his tuner to a ground rod, but also his coax to the radio will tie him in to the service ground of the residence. |
On Fri, 14 Jan 2005 20:08:36 GMT, Lancer wrote in
: On Fri, 14 Jan 2005 19:40:56 GMT, wrote: On 14 Jan 2005 14:40:43 GMT, Steveo wrote: I think Mrs. Enzo will get ****ed. Hiding it out in the trees would be great. Plus I don't know if there are any local ordinances regarding a mast. Frank presented another problem. The damn Ground hogs, moles, squirrels, will eat my coax. Vinnie S. Vinnie, Frank, pay attention. He is going to do a buried 150 ft coax run to the tree, right? What's the velocity factor of RG8 or of the coax he will use? .78 or 78% Do the math, how much of his 4w out will reach the antenna? 2.9 watts 150 feet of RG-8 has 1.71 dB loss at 27 MHz, so the power at the other end would be 2.7 watts. Not enough to quibble about except that line loss has nothing to do with velocity factor. |
On Fri, 14 Jan 2005 20:38:04 GMT, wrote in
: On Fri, 14 Jan 2005 07:21:36 GMT, wrote in : On Fri, 14 Jan 2005 05:18:49 GMT, wrote in : snip Vinnie, don't use a tuner if you don't know WTF you're doing, The guy want's the most bang for his buck, and he can do that with an antenna tuner. It will probably cost him a whole $20 and it doesn't take a college degree to operate -- jeez, it's only three knobs. And even if you don't know what you are doing you can usually fiddle with it long enough to tune in a good match to just about anything, even a bed spring. you'll be constantly throwing carriers yelling AAUDDIOO whistling into the mike trying to get 1:1, a real pain in the ass for anyone trying to use the CB in your area. Forget about radials in the attic, you'll screw it up, stop trying to get cute, JUST BUY A NORMAL CB ANTENNA AND PUT IT OUTSIDE, YOU F-ING MAROON. If you get that upset about such a trivial issue then maybe you should look for a stress management support group in your area. Antenna tuner loading his rain gutters? Chances are good he'll be into all the electronic devices in his house. That's a crock of **** and you know it. Yeah, but it's only a partial crock of ****. The rain gutters or wire or whatever are only half the dipole...... It's not a dipole or even half of a dipole. It's just an untuned hunk of metal, hence the need for a tuner. And a tuner doesn't turn it into a hertzian dipole -- it just sets up a resonance so RF current can flow and therefore radiate. so the house wiring will become the other active half and they will radiate. So what's the problem? He grounds his tuner to a ground rod, but also his coax to the radio will tie him in to the service ground of the residence. And your point is.....? |
On Fri, 14 Jan 2005 09:34:09 -0500, Vinnie S.
wrote in : snip If I use a Firestik, which are usually top-loaded, and connect it to some 9 ft. piping that I can use as radials (in a crossing pattern), and ground them to a grounding rod, would that work? Why pipe? Just run a whole bunch of wires radiating from the base. Make them as long as possible and don't worry about any specific length -- it's even better if they are different lengths (which will be the case unless your house is round). Simply cover your attic floor with radials. Also, I have ground hogs, moles, and rabbits everywhere. Won't they chew up the coax? If you leave them on or under the ground, yep. I guess I am going to have PVC conduit the coax then. I don't have a choice. I wouldn't even mess with running a coax out that far. It's just not worth the effort. You would be better off using what you have around the house. Got a flagpole? |
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On Fri, 14 Jan 2005 13:56:28 -0800, Frank Gilliland
wrote: On Fri, 14 Jan 2005 09:34:09 -0500, Vinnie S. wrote in : snip If I use a Firestik, which are usually top-loaded, and connect it to some 9 ft. piping that I can use as radials (in a crossing pattern), and ground them to a grounding rod, would that work? Why pipe? Just run a whole bunch of wires radiating from the base. Make them as long as possible and don't worry about any specific length -- it's even better if they are different lengths (which will be the case unless your house is round). Simply cover your attic floor with radials. If the wire will work just as good, I wil do that. Also, I have ground hogs, moles, and rabbits everywhere. Won't they chew up the coax? If you leave them on or under the ground, yep. I guess I am going to have PVC conduit the coax then. I don't have a choice. I wouldn't even mess with running a coax out that far. It's just not worth the effort. You would be better off using what you have around the house. Got a flagpole? No. And I can't put one in front of my house, because the septic drain field is there. Vinnie S. |
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