[TowerTalk] AB577/GR TOWER INFO

[Bob Allen]

Dave,
Our club owns 2 of them that we use for Field Day, we are 2A and run one 
tower with a 20meter yagi just above the top of the ab577 and a 15 meter 
yagi 9 ft above it on a 1 5/8" od pipe (fencing pipe) that goes in the 
original mast top fitting with 2-3' a piece of  1.9" pipe as a spacer. 
this setup stood 40-50 mph winds this year ! A tree limb even came down 
and hit a guy wire,  the report I got from that was the tower shook a 
little when the limb hit.
The other tower has has a Mosley TA-33m (senior- tribander 10-15-20m) on 
it with 9' ft. of pipe holding up the spreader for our delta loop. This 
tower didn't even quiver during the blow.
The biggest issue we have is looseness in the joints that makes erecting 
these difficult and I fixed it by making .005"T shims for the the joint 
and that problem was cured.
Note that the Yagi we use are fair sized 14-20" booms and 15-28' 
elements, all three element, on the 15-20m tower that is a fair wind 
load and with the 15m up 9' there is quite a lever arm on the top of the 
mast but it worked fine.
Don't break the winch as they are hard to get.
BTW cost to the Gov. $15000, remember it's not their money.
Brag line: we finish in the top 10 at FD a lot, call W1NVT .
Hope this helps
Bob
KB1FRW
73

darruzza at adelphia.net wrote:

>Bob,
>No problem. I also have a ab577 tower. I have not used it yet but it's a beauty. Probably cost the us gov. $5,000 new. 
>Do you have a 577? If so what do you have on top of it and have you had any problems with it?
>
>73 
>Dave W1CTN
>  
>
>>From: Bob Allen <mcamp at gmavt.net>
>>Date: 2004/08/12 Thu PM 11:07:06 EDT
>>To: darruzza at adelphia.net
>>Subject: Re: [TowerTalk] AB175/GR TOWER INFO
>>
>> Dave I misread the model number, the manual I have is for an AB577 not 
>>an AB175,
>>Sorry about that
>>Bob
>>KB1FRW
>>
>>
>>darruzza at adelphia.net wrote:
>>
>>    
>>
>>>Bob..
>>>I'll send a SASE CD mailer
>>>
>>>Tnx
>>>Dave W1CTN
>>>
>>> 
>>>
>>>      
>>>
>>>>From: Bob Allen <mcamp at gmavt.net>
>>>>Date: 2004/08/12 Thu PM 08:18:36 EDT
>>>>To: Ryan Arruzza <buddyrda at hotmail.com>
>>>>CC: towertalk at contesting.com
>>>>Subject: Re: [TowerTalk] AB175/GR TOWER INFO
>>>>
>>>>There is a downloadable copy here for $3.00:
>>>>http://www.tpub-products.com/product_info.php?cPath=21_36_93&products_id=7185&osCsid=213e62c390aa5156262fc7264e6693d3
>>>>I have a copy I scanned that is in JPEG format but it is 26mb,  you can 
>>>>send a SASE CD mailer if you want
>>>>
>>>>Bob
>>>>KB1FRW
>>>>
>>>>
>>>>Ryan Arruzza wrote:
>>>>
>>>>   
>>>>
>>>>        
>>>>
>>>>>Hello all,
>>>>>
>>>>>I need a copy of the manual for a AB175/GR military tower/mast. It is a 50'
>>>>>triangular lattice tower that was probably used for wire antennas.
>>>>>
>>>>>Each side is smaller than rohn 25.
>>>>>
>>>>>
>>>>>
>>>>>Thanks
>>>>>
>>>>>Dave W1CTN 
>>>>>
>>>>>darruzza at adelphia.net
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>_______________________________________________
>>>>>
>>>>>See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>>>>>
>>>>>_______________________________________________
>>>>>TowerTalk mailing list
>>>>>TowerTalk at contesting.com
>>>>>http://lists.contesting.com/mailman/listinfo/towertalk
>>>>>
>>>>>
>>>>>
>>>>>     
>>>>>
>>>>>          
>>>>>
>>>>_______________________________________________
>>>>
>>>>See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>>>>
>>>>_______________________________________________
>>>>TowerTalk mailing list
>>>>TowerTalk at contesting.com
>>>>http://lists.contesting.com/mailman/listinfo/towertalk
>>>>
>>>>   
>>>>
>>>>        
>>>>
>>> 
>>>
>>>      
>>>
>>    
>>
>
>  
>