I see that page says guyed LL towers were rare. Alpha is guyed with
horns on top. I wonder how rare the periscope towers are (parabolics on
the ground aimed up at reflector plates on top). Those have to be a
kite. I wish he would take those down.
I guess Benson did collapse, and it was free-standing, not guyed, but
that was an EF4 tornado.
On 10/20/2014 10:51 PM, Ken Hohhof via Af wrote:
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 <mailto:[email protected]>
*Sent:* Monday, October 20, 2014 10:17 PM
*To:* [email protected] <mailto:[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]
<mailto:[email protected]>> wrote:
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] <mailto:[email protected]>> wrote:
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:
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] <mailto:[email protected]>> wrote:
The cost to remove them is to expense
On Oct 20, 2014 6:52 PM, "Jaime Solorza via Af"
<[email protected] <mailto:[email protected]>> wrote:
Wonder why they dont take them down? Not used any
longer
Jaime Solorza
