Looks like youse guys will be able to conduct some right powerful and
lengthy rag chewz !!
73
N4FX
----- Original Message -----
From: "jeremy-ca" <km1h@jeremy.mv.com>
To: "Christopher J Galbraith" <cgalbrai@umich.edu>; "'towertalk'"
<towertalk@contesting.com>
Sent: Friday, August 17, 2007 3:50 PM
Subject: Re: [TowerTalk] Our club's (W8UM) new tower and antennas
> How come the extra weight of 55G when 45G or even 25G would suffice for
> that
> small load. Ive been involved in several roof top installs at
> commercial/industrial sites and roof loading weight was always the primary
> concern.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Christopher J Galbraith" <cgalbrai@umich.edu>
> To: "'towertalk'" <towertalk@contesting.com>
> Sent: Friday, August 17, 2007 3:14 PM
> Subject: [TowerTalk] Our club's (W8UM) new tower and antennas
>
>
>> Gang,
>>
>> For your enjoyment, here are some action shots of our new W8UM roof-top
>> tower installation from 7/30/07. It is a 40 ft Rohn 55G tower on top of
>> the
>> 60 ft tall Electrical Engineering and Computer Science (EECS) building at
>> The University of Michigan:
>>
>> http://www.umich.edu/~umarc/projects/towerConstruction.html
>>
>> And one view from the ground on Michigan's North Campus:
>>
>> http://www.umich.edu/~umarc/photos/tower/views/tower_Beal.jpg
>>
>> The new tower and antennas have evoked some positive responses from the
>> engineering types in the vicinity ("it is huge!") and we hope it will
>> serve
>> as our most valuable visual recruiting tool (enticing students into the
>> W8UM
>> shack).
>>
>> The 4-el SteppIR at 105 ft is a DX killer on 20m (and should be on 14-30
>> MHz
>> when propagation improves) and the dipole seems to be doing well on 40m,
>> too.
>>
>> We originally were going with a MonstIR for the HF Yagi but ran into a
>> series of engineering problems. It is a long story, but our problems
>> were
>> mostly due to having structural engineers that did not have any
>> experience
>> with roof-top antenna installations. In the end, the 6-20m Yagi with
>> 30/40m
>> dipole was a good compromise between overall performance and
>> size/weight/cost.
>>
>> I sincerely thank everyone on the list who gave us excellent advice
>> throughout the design process. We learned a great deal in the year or so
>> of
>> putting the design together, and a lot of information came from list
>> members' valuable experience. As you'll note on the web page, Hank
>> Lonberg
>> and Matt Strelow had a lot to do with our success, too!
>>
>> Support your college amateur radio clubs!
>>
>> 73, Chris KA8WFC
>>
>> The U-M Amateur Radio Club (W8UM)
>> www.umich.edu/~umarc
>>
>> P.S. If you know any U-M alumni, please spread the word. We love to hear
>> from former W8UM (and W8PGW, W8AXZ, even 8AX!) ops.
>>
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>
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>
>
>
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