Terry was adding antennas back onto the concrete tower to restore it. Has he reversed that decision?
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com ----- Original Message ----- From: "Ken Hohhof via Af" <[email protected]> To: [email protected] Sent: Monday, October 20, 2014 10:51:01 PM Subject: Re: [AFMUG] On AT&T building The horn reflectors replaced the KS-5759 delay lens antennas, I keep wondering if the Cambium “LENS” operated on the same principle to focus the beam similar to an optical lens. Except I think they used metal not dielectric lenses. On towers it does make sense to remove the big horns to deload the towers. American Tower owns an old Long Lines guyed tower in Monroe Center, IL with 3 horns at the top, it still looks pretty much like this picture except there’s an AT&T cellsite, and copper thieves stole all the waveguide: http://www.long-lines.net/places-routes/MonroeCenterIL/MonroeCntr.html Every time I drive by there, I wonder why AT doesn’t take down the horns before a windstorm takes down the whole tower. They would gain a lot of rentable space and remove a lot of windload in return for renting a crane for half a day. I took the attached photo this summer, you can see both KS-5759 and KS-15676 antennas on the 2 towers. Not visible, there are 3 cornucopias (conical horns) lying on the ground that have been taken down to deload the towers. From: George Skorup (Cyber Broadcasting) via Af Sent: Monday, October 20, 2014 10:17 PM To: [email protected] Subject: Re: [AFMUG] On AT&T building The KS-15676 is about 43dBi and1.5° beamwidth at 6GHz. I want to say something like 3 to 13 or 15GHz bandwidth. Couple different revisions/upgrade kits, the latest added some sidelobe suppression in the 70's, IIRC. Nuclear blast hardening mod kits. Really cool stuff. Same design/type that discovered the cosmic microwave background, though I think that particular horn was quite a bit larger. On 10/20/2014 9:36 PM, Jaime Solorza via Af wrote: How much gain do those periscope antenna have? Jaime Solorza On Oct 20, 2014 8:21 PM, "TJ Trout via Af" < [email protected] > wrote: <blockquote> A guy near me bought 2 mountain top sites with HUGE concrete buildings that have underground gas storage , generators, bedrooms, showers, etc for like $50,000 for 2 sites with the land and he used a bullet and wave guide adapters and is running a 802.11 link across those huge legacy horn dishes! On Mon, Oct 20, 2014 at 7:12 PM, George Skorup (Cyber Broadcasting) via Af < [email protected] > wrote: <blockquote> I really wish no more of those will be destroyed, they are a part of communications history.. and we can put some really long links on them. :) Where they're not under Ma Bell's control anyway. On 10/20/2014 9:07 PM, Chuck Hogg via Af wrote: <blockquote> The cost to leave them is nothing. :) I've seen multiple buildings with them. Regards, Chuck On Mon, Oct 20, 2014 at 9:55 PM, Robert Bain via Af < [email protected] > wrote: <blockquote> The cost to remove them is to expense On Oct 20, 2014 6:52 PM, "Jaime Solorza via Af" < [email protected] > wrote: <blockquote> Wonder why they dont take them down? Not used any longer Jaime Solorza </blockquote> </blockquote> </blockquote> </blockquote> </blockquote>
