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#1
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I have two multiband trap verticals They are not exactly the same, but
close. Obviously they're intended to be mounted vertically above a ground. What happens if I mount them horizontally, base-to base? If I feed one with coax as designed, would it see the other one as a counterpoise? Could I remove any base matching components and feed them both with a 1:1 balun, in effect duplicating the function of a horizontal wire trap dipole? I'm really impressed with the lower noise of a horizontal antenna. Screw the directionality drawbacks of a horizontal! I can hear more stations. I am having great fun with HF. My 10 meter copper pipe dipole is laying on the roof with one element extended using a short clip lead and some RG-6 TV coax. Tonight, my Kenwood TS-120 reached out from San Diego for a QSO with New Zealand on 20 meters, my first contact outside this hemisphere. Neat. "Sal" (really KD6VKW) |
#2
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![]() "Sal M. Onella" wrote in message ... I have two multiband trap verticals They are not exactly the same, but close. Obviously they're intended to be mounted vertically above a ground. What happens if I mount them horizontally, base-to base? If I feed one with coax as designed, would it see the other one as a counterpoise? Could I remove any base matching components and feed them both with a 1:1 balun, in effect duplicating the function of a horizontal wire trap dipole? I'm really impressed with the lower noise of a horizontal antenna. Screw the directionality drawbacks of a horizontal! I can hear more stations. I am having great fun with HF. My 10 meter copper pipe dipole is laying on the roof with one element extended using a short clip lead and some RG-6 TV coax. Tonight, my Kenwood TS-120 reached out from San Diego for a QSO with New Zealand on 20 meters, my first contact outside this hemisphere. Neat. "Sal" (really KD6VKW) What you would have is a trap dipole, a fairly common antenna. With out seeing the antennas I am not sure how the twoo different types would intereact but its worth a try. You will probably need a tuner. |
#3
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On Sat, 24 Mar 2007 06:11:45 -0400, "Jimmie D"
wrote: "Sal M. Onella" wrote in message ... I have two multiband trap verticals They are not exactly the same, but close. Obviously they're intended to be mounted vertically above a ground. What happens if I mount them horizontally, base-to base? If I feed one with coax as designed, would it see the other one as a counterpoise? Could I remove any base matching components and feed them both with a 1:1 balun, in effect duplicating the function of a horizontal wire trap dipole? I'm really impressed with the lower noise of a horizontal antenna. Screw the directionality drawbacks of a horizontal! I can hear more stations. I am having great fun with HF. My 10 meter copper pipe dipole is laying on the roof with one element extended using a short clip lead and some RG-6 TV coax. Tonight, my Kenwood TS-120 reached out from San Diego for a QSO with New Zealand on 20 meters, my first contact outside this hemisphere. Neat. "Sal" (really KD6VKW) What you would have is a trap dipole, a fairly common antenna. With out seeing the antennas I am not sure how the twoo different types would intereact but its worth a try. You will probably need a tuner. If both were the same, I think he would be better off, but it should turn into a rotatable dipole similar to a multiband beam, but without the directors and reflectors. I see there is no reason it shouldn't work once he gets them tuned. Buck -- 73 for now Buck, N4PGW www.lumpuckeroo.com |
#4
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Buck wrote:
If both were the same, I think he would be better off, but it should turn into a rotatable dipole similar to a multiband beam, but without the directors and reflectors. I see there is no reason it shouldn't work once he gets them tuned. How much would it weigh? -- 73, Cecil http://www.w5dxp.com |
#5
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![]() "Cecil Moore" wrote in message ... Buck wrote: If both were the same, I think he would be better off, but it should turn into a rotatable dipole similar to a multiband beam, but without the directors and reflectors. I see there is no reason it shouldn't work once he gets them tuned. How much would it weigh? -- 73, Cecil http://www.w5dxp.com Yeah I thought about that too after my inital post. It would be a bear to make a rotateable dipole using this if its anything like my old trap vertical. |
#6
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![]() "Jimmie D" wrote in message ... "Cecil Moore" wrote in message ... Buck wrote: If both were the same, I think he would be better off, but it should turn into a rotatable dipole similar to a multiband beam, but without the directors and reflectors. I see there is no reason it shouldn't work once he gets them tuned. How much would it weigh? -- 73, Cecil http://www.w5dxp.com Yeah I thought about that too after my inital post. It would be a bear to make a rotateable dipole using this if its anything like my old trap vertical. I hadn't bargained on rotating it, although that's not out of the question. I think those verticals are about 20 pounds each, so it would be a project. I will weigh them tomorrow. I do have a rotator thrust bearing that I once used with a monster VHF TV antenna. The Hustler four band (10, 15, 20 , 40) is 35 feet tall. The other antenna is a five-band, but I don't have the specs here at hand. It's presumably the same, unless they got 80 with some folding tricks, in which case I don't know how tall it would be. Depending on where I would put a rotating 70-foot horizontal antenna, I'm sure I could either prune my neighbor's tree or make contact with the power company, via their overhead lines. Did I mention I am on a city street with a 100 x 100 lot? Hm-m-m -- better not rotate. |
#7
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On Sat, 24 Mar 2007 14:05:28 GMT, Cecil Moore
wrote: Buck wrote: If both were the same, I think he would be better off, but it should turn into a rotatable dipole similar to a multiband beam, but without the directors and reflectors. I see there is no reason it shouldn't work once he gets them tuned. How much would it weigh? That part hadn't occurred to me. Come to think of it, I don't think they were designed to withstand horizontal positioning, but then I don't know the antennas. Anyway, good luck in the antenna. Maybe a vertical dipole? -- 73 for now Buck, N4PGW www.lumpuckeroo.com |
#8
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![]() "Buck" wrote in message news ![]() That part hadn't occurred to me. Come to think of it, I don't think they were designed to withstand horizontal positioning, but then I don't know the antennas. Anyway, good luck in the antenna. Maybe a vertical dipole? withstand horizontal positioning If I do this, I will have the thing laying on the roof, at or near the peak, so support won't be a consideration. (The far end of each unit could stick out and be self-supporting.) Having it slide down the roof is a bigger worry. vertical dipole Ahah! I started out with a 10m vertical dipole as my first-ever HF antenna, last month. (It has since morphed into an OCF horizontal dipole that I've stretched all the way to 40m with a homebrew pi-network tuner I acquired at the swap meet.). To the point, two opposing trap verticals as a single dipole would be a 70 foot vertical structure and is not within my capabilities. (I would love to try it, though.) "Sal" (KD6VKW) |
#9
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![]() I have two multiband trap verticals They are not exactly the same, but close. Obviously they're intended to be mounted vertically above a ground. What happens if I mount them horizontally, base-to base? If I feed one with ....[snip].... I've done it with pairs of identical "hamsticks" (not multiband, but quick-disconnects made it relatively easy to change bands), coax fed, and mounted (horizontally, pointed fore and aft, of course!-) about two feet above the cab of my pickup. It made a GREAT NVIS HF antenna! -- --Myron A. Calhoun; W0PBV; 2001 Dunbar Road; Manhattan, KS 66502-3907 Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge NRA Life Member & Certified Instructor for Rifle, Pistol, & Home Firearm Safety Also Certified Instructor for the Kansas Concealed-Carry Handgun (CCH) license |
#10
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![]() wrote in message ... I have two multiband trap verticals They are not exactly the same, but close. Obviously they're intended to be mounted vertically above a ground. What happens if I mount them horizontally, base-to base? If I feed one with ....[snip].... I've done it with pairs of identical "hamsticks" (not multiband, but quick-disconnects made it relatively easy to change bands), coax fed, and mounted (horizontally, pointed fore and aft, of course!-) about two feet above the cab of my pickup. It made a GREAT NVIS HF antenna! -- --Myron A. Calhoun; W0PBV; Thanks. I don't own any of them, yet, but it sounds like a possibility. I'm probably going to want DX, though, so NVIS isn't something that I'm seeking. If I'm horizontal, I'll want some elevation. "Sal" |
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