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largest Ham Antenna ever :)
In going with the current LONG thread. Whats the largest you've seen.
Here is mine. I cannot confirm it nor find it. But in California (near the Bay Area where I was stationed at Moffett) I remember seeing a Giant 3 elem beam with Rohn 25 as the mast. I believe a Ham Friend of mine said it was an 80m Shorty (But it just seemed to unreal for me) In Diego Garcia we used 3 Mono banders made from 2 Log Periodics the Comsta gave them. The 20m was 7 or 8 elems. Was huge. -- Rick Everett, Washington Remove THREAD to reply. |
On Mon, 23 May 2005 17:03:26 GMT, "R. Scott"
wrote: In going with the current LONG thread. Whats the largest you've seen. Here is mine. Hi Rick, Drive 20 miles north east to Arlington. Find your way to Jim Creek, and follow the signs to the Naval Station in the valley. Look up. (if the rain ever lets up) 2400 foot vertical with a 1 square mile top hat. 73's Richard Clark, KB7QHC |
On Mon, 23 May 2005 10:35:22 -0700, Richard Clark
wrote: 2400 foot vertical with a 1 square mile top hat. Hmmm, On reflection, that isn't in the Ham bands is it? Well, it should be! That and Amateur Radar (and even AHAARP). 73's Richard Clark, KB7QHC |
In article ,
R. Scott wrote: In going with the current LONG thread. Whats the largest you've seen. Here is mine. I cannot confirm it nor find it. But in California (near the Bay Area where I was stationed at Moffett) I remember seeing a Giant 3 elem beam with Rohn 25 as the mast. I believe a Ham Friend of mine said it was an 80m Shorty (But it just seemed to unreal for me) I've been told that the gent who owns the Ham Radio Outlet dealership chain has a site located in the hills south of San Jose, and that it includes a 3-element 80-meter rotatable beam. I was told that the whole setup is managed by remote control - the owner lives elsewhere, and accesses the transceivers and antenna controls via a landline connection of some sort. Haven't seen it myself... it would certainly be impressive! -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
"Richard Clark" wrote in message
... On Mon, 23 May 2005 17:03:26 GMT, "R. Scott" wrote: In going with the current LONG thread. Whats the largest you've seen. Here is mine. Hi Rick, Drive 20 miles north east to Arlington. Find your way to Jim Creek, and follow the signs to the Naval Station in the valley. Look up. (if the rain ever lets up) 2400 foot vertical with a 1 square mile top hat. 73's Richard Clark, KB7QHC Anybody seen that massive antenna farm, just off I95, on the north west side of Trenton NJ? Often wondered what it was. 73, Frank |
Dave Platt wrote: In article , R. Scott wrote: In going with the current LONG thread. Whats the largest you've seen. Here is mine. I cannot confirm it nor find it. But in California (near the Bay Area where I was stationed at Moffett) I remember seeing a Giant 3 elem beam with Rohn 25 as the mast. I believe a Ham Friend of mine said it was an 80m Shorty (But it just seemed to unreal for me) I've been told that the gent who owns the Ham Radio Outlet dealership chain has a site located in the hills south of San Jose, and that it includes a 3-element 80-meter rotatable beam. I was told that the whole setup is managed by remote control - the owner lives elsewhere, and accesses the transceivers and antenna controls via a landline connection of some sort. Haven't seen it myself... it would certainly be impressive! Force 12 has a 3 elemnent 80M beam in their catalog. 61 foot boom, 52 foot turning radius with 83 foot shortened elements. A beast. http://force12inc.com/F12-specs-mag-r1-0.htm Dave Platt AE6EO w3rv |
On Mon, 23 May 2005 10:45:57 -0700, Richard Clark
wrote: On Mon, 23 May 2005 10:35:22 -0700, Richard Clark wrote: 2400 foot vertical with a 1 square mile top hat. Hmmm, On reflection, that isn't in the Ham bands is it? Well, it should be! That and Amateur Radar (and even AHAARP). 73's Richard Clark, KB7QHC Isn't there a guy in Texas with an 80 meter beam? And then there's w8ji & his 300 foot tower on his old cow farm. bob k5qwg |
Bob Miller wrote: On Mon, 23 May 2005 10:45:57 -0700, Richard Clark wrote: On Mon, 23 May 2005 10:35:22 -0700, Richard Clark wrote: 2400 foot vertical with a 1 square mile top hat. Hmmm, On reflection, that isn't in the Ham bands is it? Well, it should be! That and Amateur Radar (and even AHAARP). 73's Richard Clark, KB7QHC Isn't there a guy in Texas with an 80 meter beam? And then there's w8ji & his 300 foot tower on his old cow farm. bob k5qwg I always thought the biggest ham antenna was supposedly the old W6AM rhombic on Palos Verdes peninsula. http://home.swipnet.se/dx/porthole/w6am1.htm |
On Mon, 23 May 2005 15:05:03 -0700, Jim Kelley
wrote: I always thought the biggest ham antenna was supposedly the old W6AM rhombic on Palos Verdes peninsula. http://home.swipnet.se/dx/porthole/w6am1.htm Hi Jim, Any picture that requires a satellite view must qualify as BIG. 73's Richard Clark, KB7QHC |
I believe that the Arecibo Observatory antenna was used for a moonbouce
QSO...! KP4DX - Luis "R. Scott" wrote in message ... In going with the current LONG thread. Whats the largest you've seen. Here is mine. I cannot confirm it nor find it. But in California (near the Bay Area where I was stationed at Moffett) I remember seeing a Giant 3 elem beam with Rohn 25 as the mast. I believe a Ham Friend of mine said it was an 80m Shorty (But it just seemed to unreal for me) In Diego Garcia we used 3 Mono banders made from 2 Log Periodics the Comsta gave them. The 20m was 7 or 8 elems. Was huge. -- Rick Everett, Washington Remove THREAD to reply. |
On Mon, 23 May 2005 18:17:29 -0700, Richard Clark
wrote: On Mon, 23 May 2005 15:05:03 -0700, Jim Kelley wrote: I always thought the biggest ham antenna was supposedly the old W6AM rhombic on Palos Verdes peninsula. http://home.swipnet.se/dx/porthole/w6am1.htm Hi Jim, Any picture that requires a satellite view must qualify as BIG. 73's Richard Clark, KB7QHC I'm surprised that no one has mentioned the Wullenweber's (AN/FLR-9) that were used for radio survellence and direction-finding years ago. They may not have been the largest, but they were certainly among the most complex. R |
On Mon, 23 May 2005 19:20:06 -0700, "Fernando Diaz"
wrote: I believe that the Arecibo Observatory antenna was used for a moonbouce QSO...! Yes it was. I heard their two meter signal using a HB 7 element Yagi with the reflector about a foor off the ground and the boom propped up on a ladder. W5UN's EME array is "Mighty Big" too. I've worked him on two meter EME 2XSSB when my antenna was on;y four 3.2 lambda Yagis. http://web.wt.net/~w5un/mba2003.jpg I don't have the links but some of the OH hams have some really large stacked h-f arrays. KP4DX - Luis "R. Scott" wrote in message ... In going with the current LONG thread. Whats the largest you've seen. Here is mine. I cannot confirm it nor find it. But in California (near the Bay Area where I was stationed at Moffett) I remember seeing a Giant 3 elem beam with Rohn 25 as the mast. I believe a Ham Friend of mine said it was an 80m Shorty (But it just seemed to unreal for me) In Diego Garcia we used 3 Mono banders made from 2 Log Periodics the Comsta gave them. The 20m was 7 or 8 elems. Was huge. -- Rick Everett, Washington Remove THREAD to reply. |
Fernando Diaz wrote:
I believe that the Arecibo Observatory antenna was used for a moonbouce QSO...! KP4DX - Luis Several times. The old 400MHz feed would work at 432, so on days when the moon was at the right elevation in the sky, they had maybe 20 minutes operating time as it passed directly over the dish. The last time this happened was about 20 years ago, and I was lucky enough to make a QSO. Lucky, because I almost tuned right past him, thinking "That's too strong to be a moonbounce signal." I was running a kW and 8 yagis. The QSL card said he was running 10W... and Arecibo. -- 73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek |
Ian White GM3SEK wrote: Fernando Diaz wrote: I believe that the Arecibo Observatory antenna was used for a moonbouce QSO...! KP4DX - Luis Several times. The old 400MHz feed would work at 432, so on days when the moon was at the right elevation in the sky, they had maybe 20 minutes operating time as it passed directly over the dish. As memory serves (cant find the article, in old VHFer magazine), fellow in Portland Oregon copied Sam Harris W1FZJ, wit a 1/4 wave whip stuck into the antenna jack of his Parks Converter, on 432! Said they could hear Sam's beard rubbing against the mic !! Also, what of the original "ECHO" , a metalic baloon launched as a satellite- acted as a reflector - was pretty big for it's day, tho obviously, not the most effecient. Jim NN7K |
Jim - NN7K wrote: Also, what of the original "ECHO" , a metalic baloon launched as a satellite- acted as a reflector - was pretty big for it's day, tho obviously, not the most effecient. Jim NN7K Not as big as I thought- only 40 meters dia! thought those were bigger! Jim |
On Tue, 24 May 2005 04:25:49 GMT, Russ wrote:
On Mon, 23 May 2005 18:17:29 -0700, Richard Clark wrote: On Mon, 23 May 2005 15:05:03 -0700, Jim Kelley wrote: I always thought the biggest ham antenna was supposedly the old W6AM rhombic on Palos Verdes peninsula. http://home.swipnet.se/dx/porthole/w6am1.htm Hi Jim, Any picture that requires a satellite view must qualify as BIG. 73's Richard Clark, KB7QHC I'm surprised that no one has mentioned the Wullenweber's (AN/FLR-9) that were used for radio survellence and direction-finding years ago. They may not have been the largest, but they were certainly among the most complex. The antenna you are referring to should be spelled Wollenweber, which in German means literally a "wool weaver". They got that name because of their resemblance to an automatic sock making machine. There were several of those stationed at strategic places around the world - mostly surrounding the USSR, and they were used by our people for the purpose of eavesdropping on Iron Curtain communications. I had some familiarity with the project in 1984-5 working for RCA Service Company. The project was called Maroon Archer and had been around for some time already. For example, there was one near Stuttgart. I'm sure they have been dismantled by now. Bob, W9DMK, Dahlgren, VA Replace "nobody" with my callsign for e-mail http://www.qsl.net/w9dmk http://zaffora/f2o.org/W9DMK/W9dmk.html |
Also, what of the original "ECHO" , a metalic baloon launched as a satellite- acted as a reflector - was pretty big for it's day, tho obviously, not the most effecient. Jim NN7K ECHO was a 100' balloon constructed from 1 mil aluminized mylar. It was an early attempt to achieve global TV transmission by reflecting signals from the ground station, launched on August 8, 1960. Proved unuseful due to the excessive power required of the ground transmitter. ECHO had two beacon transmitters, one at each pole, operating on 108 and 108.3 MHz. I had the priviledge of designing the antennas used on the beacon. One of my colleagues at RCA designed and built the 10 mw transmitters. The purpose of the beacons was to assure knowledge of the balloon's position duing launch in case it was obscured by clouds. Pictures showing the beacons and the technician attaching them to the balloon material will appear in my book Reflections 3, which is now in the production stage. Walt Maxwell, W2DU |
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On Tue, 24 May 2005 14:02:06 GMT, (Robert
Lay) wrote: On Tue, 24 May 2005 04:25:49 GMT, Russ wrote: On Mon, 23 May 2005 18:17:29 -0700, Richard Clark wrote: On Mon, 23 May 2005 15:05:03 -0700, Jim Kelley wrote: I always thought the biggest ham antenna was supposedly the old W6AM rhombic on Palos Verdes peninsula. http://home.swipnet.se/dx/porthole/w6am1.htm Hi Jim, Any picture that requires a satellite view must qualify as BIG. 73's Richard Clark, KB7QHC I'm surprised that no one has mentioned the Wullenweber's (AN/FLR-9) that were used for radio survellence and direction-finding years ago. They may not have been the largest, but they were certainly among the most complex. The antenna you are referring to should be spelled Wollenweber, which in German means literally a "wool weaver". They got that name because of their resemblance to an automatic sock making machine. There were several of those stationed at strategic places around the world - mostly surrounding the USSR, and they were used by our people for the purpose of eavesdropping on Iron Curtain communications. I had some familiarity with the project in 1984-5 working for RCA Service Company. The project was called Maroon Archer and had been around for some time already. For example, there was one near Stuttgart. I'm sure they have been dismantled by now. Bob, W9DMK, Dahlgren, VA Replace "nobody" with my callsign for e-mail http://www.qsl.net/w9dmk http://zaffora/f2o.org/W9DMK/W9dmk.html Here is what I found with Google: http://www.answers.com/topic/wullenweber A boyhood pal went into the Army and spent a year at Ramasun Station. He explained it to me thirty years ago. As the article states, it is a "Circularly Disposed Dipole Array". Other pictures show a building in the center of the array where radio intercept operations were conducted. The circuitry used to "rotate" the array was quite complex. They have indeed been dismantled. R |
Walt,
"Walter Maxwell" wrote in message ... Pictures showing the beacons and the technician attaching them to the balloon material will appear in my book Reflections 3, which is now in the production stage. I swear it wasn't THAT long ago you released Reflections 2! I have a suggestion for a topic to cover: The infamous discussion of, "How can rho be 1 on a transmission line (terminated in a passive network)?" ---Joel Kolstad |
Dear Russ,
I appreciate the correction. Obviously the spelling was correct as it was and the story that I had been told about it must be apocryphal. I suppose even the surname (Familiename) Wullenweber would be a corruption of Wollenweber. Your reference to the history of the system proved quite interesting. Obviously, I was also wrong about the location - although Augsberg is certainly not that far from Stuttgart - Hi. When I lived in Wiesbaden many years ago I should have traveled to the site and had a peak at it. Bob, W9DMK, Dahlgren, VA Replace "nobody" with my callsign for e-mail http://www.qsl.net/w9dmk http://zaffora/f2o.org/W9DMK/W9dmk.html |
"Joel Kolstad" wrote in message ... Walt, "Walter Maxwell" wrote in message ... Pictures showing the beacons and the technician attaching them to the balloon material will appear in my book Reflections 3, which is now in the production stage. I swear it wasn't THAT long ago you released Reflections 2! I have a suggestion for a topic to cover: The infamous discussion of, "How can rho be 1 on a transmission line (terminated in a passive network)?" ---Joel Kolstad Hi Joel, I tried to respond via Agent, which is my browser of preference, but as of trying to respond to your post I can no longer access Agent to send. Still don't know why. This is the reason for the delayed response. Anyway thanks for your interest in Reflections. The second Ed was released May 2001 and was sold out early in 2004. Been workin' on the 3rd ever since. A new Chapter 23 will have a new analysis of the quarter-wavelength transmission-line transformer, to correct some misleading material in the original copy. The new edition will also have some details on my development of the antennas that flew on the World's first wx satellites, as well as some of the quadrifilar helix antennas now flying on NOAA's polar-orbiting satellites. Concerning a topic on rho 1, of course this involves lossy lines, which I have never studied very thoroughly, so I'm not about to expose my ignorance in that area. However, R.A.Chipman discusses it well in Schaum's Outline of Theory and Problems of Transmission Lines. Recommended reading. Walt, W2DU |
Hi Walt,
"Walter Maxwell" wrote in message ... Concerning a topic on rho 1, of course this involves lossy lines, which I have never studied very thoroughly, so I'm not about to expose my ignorance in that area. However, R.A.Chipman discusses it well in Schaum's Outline of Theory and Problems of Transmission Lines. Recommended reading. OK! Aas a matter of fact, I've scanned in Chipman's book (it's available at http://oregonstate.edu/~kolstadj/ as "Transmission Lines (Chipman).pdf"), but I haven't actually had time to read any significant chunk of it yet. ---Joel |
"Joel Kolstad" wrote in message ... Hi Walt, "Walter Maxwell" wrote in message ... Concerning a topic on rho 1, of course this involves lossy lines, which I have never studied very thoroughly, so I'm not about to expose my ignorance in that area. However, R.A.Chipman discusses it well in Schaum's Outline of Theory and Problems of Transmission Lines. Recommended reading. OK! Aas a matter of fact, I've scanned in Chipman's book (it's available at http://oregonstate.edu/~kolstadj/ as "Transmission Lines (Chipman).pdf"), but I haven't actually had time to read any significant chunk of it yet. ---Joel Yep, you've got Chipman nailed down! His tome is one of my bibles. The others are Kraus' Antennas, and Ed Laport's Radio Antenna Engineering. I have scanned Laport to a CD, which I'll send you a copy unless you already have one. It's too large to email, and I don't yet have it available on my web page. So let me know if you'd like a copy. It's also a gold mine. Walt, W2DU |
Hi Walt,
"Walter Maxwell" wrote in message ... Yep, you've got Chipman nailed down! His tome is one of my bibles. The others are Kraus' Antennas, and Ed Laport's Radio Antenna Engineering. I have Kraus' book (the last edition printed! -- now that Dr. Kraus has died, it'll be interesting to see if Ronald Marhefka releases another edition of it?) and Laport's book from http://snulbug.mtview.ca.us/books/Ra...naEngineering/. Is that the same scan you have? I tried to build a 2.4GHz helical antenna based on the information in Kraus' book some 3 or so years ago now, but unfortunately it didn't work. Having access to a network analyzer these days would probably improve my odds...! Thanks, --Joel |
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