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#1
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discone antenna
Getting ready to purchase a ICOM 8500, and as I live in a community
where a long wire would be out of the question, I have been told that a discone will work quite well for my monitoring activities, and will be rather hard for the grumpy neighbors to see, as compared to a beam, etc. etc.... . Any comments on this? How high should I install it. Probably cant go over 15 or 20 feet at the most. I intend to use some type of telescoping mast, so when one of our Florida hurricanes comes, I can "bring er down"! Since the antenna will be coupled to the mast, will I still need to ground it? (I know thats probably a really stupid question, but it seems as if the metal mast would take a lightning strike (God forbid!) to the ground, rather than into the house..(??) A neighbor of mine has a little discone up around 15 ft., and uses it to transmit on the 6 meter (or is it 20 meter) bank. Works quite well, he says. Thanks in advance for any info |
#2
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Gene wrote: Getting ready to purchase a ICOM 8500, and as I live in a community where a long wire would be out of the question, I have been told that a discone will work quite well for my monitoring activities, and will be rather hard for the grumpy neighbors to see, as compared to a beam, etc. etc.... . Any comments on this? How high should I install it. Probably cant go over 15 or 20 feet at the most. I intend to use some type of telescoping mast, so when one of our Florida hurricanes comes, I can "bring er down"! Since the antenna will be coupled to the mast, will I still need to ground it? (I know thats probably a really stupid question, but it seems as if the metal mast would take a lightning strike (God forbid!) to the ground, rather than into the house..(??) A neighbor of mine has a little discone up around 15 ft., and uses it to transmit on the 6 meter (or is it 20 meter) bank. Works quite well, he says. Thanks in advance for any info You'll most certainly need (or want) some other sort of antenna other than the discone to monitor shortwave. dxAce |
#3
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I use a discone on my VR-5000 and PCR-1000. They work well for me from 900
down to WWV at 2500. "Gene" wrote in message ... Getting ready to purchase a ICOM 8500, and as I live in a community where a long wire would be out of the question, I have been told that a discone will work quite well for my monitoring activities, and will be rather hard for the grumpy neighbors to see, as compared to a beam, etc. etc.... . Any comments on this? How high should I install it. Probably cant go over 15 or 20 feet at the most. I intend to use some type of telescoping mast, so when one of our Florida hurricanes comes, I can "bring er down"! Since the antenna will be coupled to the mast, will I still need to ground it? (I know thats probably a really stupid question, but it seems as if the metal mast would take a lightning strike (God forbid!) to the ground, rather than into the house..(??) A neighbor of mine has a little discone up around 15 ft., and uses it to transmit on the 6 meter (or is it 20 meter) bank. Works quite well, he says. Thanks in advance for any info |
#4
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Gene wrote: Getting ready to purchase a ICOM 8500, and as I live in a community where a long wire would be out of the question, I have been told that a discone will work quite well for my monitoring activities, and will be rather hard for the grumpy neighbors to see, as compared to a beam, etc. etc.... . Any comments on this? How high should I install it. Probably cant go over 15 or 20 feet at the most. I intend to use some type of telescoping mast, so when one of our Florida hurricanes comes, I can "bring er down"! Since the antenna will be coupled to the mast, will I still need to ground it? (I know thats probably a really stupid question, but it seems as if the metal mast would take a lightning strike (God forbid!) to the ground, rather than into the house..(??) A neighbor of mine has a little discone up around 15 ft., and uses it to transmit on the 6 meter (or is it 20 meter) bank. Works quite well, he says. Thanks in advance for any info You can use a discone for 30 Mhz and up for sure. the performance below that falls off very quick. I use my discone with an ICOM R7000. As for grounding yes you have to ground the anttena. It is for safety as the lightening may want to flow down your coax lead in no matter what is struck by the lightening. Lightening goes everywhere when it hits and into the house via the coax is a good possibliity. My discone sits on top of 2-10 foot mast sections. The coax is fed to a gound rod via an anti satic device, then on to the radio. the mast is bolted to my dack so is easy to take down You could use the 20 mast as an antenna. run coax to the mast and secure it to the bottom. You now have a 20 foot vertical antenna that will be fine on SW. There is more info about grounding and antennas at the AMANDX site below -- 73 and Best of DX Shawn Axelrod VE4DX1SMA Visit the AMANDX DX site with info for the new or experienced listener: http://www.angelfire.com/mb/amandx/index.html REMEMBER ON A CLEAR DAY YOU CAN HEAR FOREVER |
#5
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Jim Hackett wrote: I use a discone on my VR-5000 and PCR-1000. They work well for me from 900 down to WWV at 2500. I wouldn't disagree that the discone will indeed 'work' down that low, but will it work well? That's the question. Heck, a 5' piece of wire will work, but the question remains, will it work well? I've never seen a 'discone' that would work well into the shortwave range unless it was one of the humongous ones such as that used by the FCC at their monitoring station which used to be located south of me here. dxAce "Gene" wrote in message ... Getting ready to purchase a ICOM 8500, and as I live in a community where a long wire would be out of the question, I have been told that a discone will work quite well for my monitoring activities, and will be rather hard for the grumpy neighbors to see, as compared to a beam, etc. etc.... . Any comments on this? How high should I install it. Probably cant go over 15 or 20 feet at the most. I intend to use some type of telescoping mast, so when one of our Florida hurricanes comes, I can "bring er down"! Since the antenna will be coupled to the mast, will I still need to ground it? (I know thats probably a really stupid question, but it seems as if the metal mast would take a lightning strike (God forbid!) to the ground, rather than into the house..(??) A neighbor of mine has a little discone up around 15 ft., and uses it to transmit on the 6 meter (or is it 20 meter) bank. Works quite well, he says. Thanks in advance for any info |
#6
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On Sun, 22 Aug 2004 08:29:47 -0500, The Axelrods
wrote: Thanks in advance for any info You can use a discone for 30 Mhz and up for sure. the performance below that falls off very quick. I use my discone with an ICOM R7000. As for grounding yes you have to ground the anttena. It is for safety as the lightening may want to flow down your coax lead in no matter what is struck by the lightening. Lightening goes everywhere when it hits and into the house via the coax is a good possibliity. My discone sits on top of 2-10 foot mast sections. The coax is fed to a gound rod via an anti satic device, then on to the radio. the mast is bolted to my dack so is easy to take down Can you expound a little on this.. "anti static" device? Not quite sure I know what this one is. You could use the 20 mast as an antenna. run coax to the mast and secure it to the bottom. You now have a 20 foot vertical antenna that will be fine on SW. Run this one to a ground rod also, as the above? There is more info about grounding and antennas at the AMANDX site below Maybe should have gone there before I post this.. Thanks! Gene |
#7
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You might wan to consider the AOR SA7000 antenna.
http://tinyurl.com/x6to It's pretty expensive, but it does cover shortwave frequencies as well as VHF/UHF. It also has the added benefit of being pretty discrete. "Gene" wrote in message ... Getting ready to purchase a ICOM 8500, and as I live in a community where a long wire would be out of the question, I have been told that a discone will work quite well for my monitoring activities, and will be rather hard for the grumpy neighbors to see, as compared to a beam, etc. etc.... . Any comments on this? How high should I install it. Probably cant go over 15 or 20 feet at the most. I intend to use some type of telescoping mast, so when one of our Florida hurricanes comes, I can "bring er down"! Since the antenna will be coupled to the mast, will I still need to ground it? (I know thats probably a really stupid question, but it seems as if the metal mast would take a lightning strike (God forbid!) to the ground, rather than into the house..(??) A neighbor of mine has a little discone up around 15 ft., and uses it to transmit on the 6 meter (or is it 20 meter) bank. Works quite well, he says. Thanks in advance for any info |
#8
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#9
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#10
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On Sun, 22 Aug 2004 09:20:04 -0500, "mike0219116"
wrote: You might wan to consider the AOR SA7000 antenna. http://tinyurl.com/x6to It's pretty expensive, but it does cover shortwave frequencies as well as VHF/UHF. It also has the added benefit of being pretty discrete. Thanks Mike.. The SA7000 looks like it might be a better alternative, and actually less obtrusive than the discone. The SA7000 on a 20' mast ought to be a good choice. |
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