What kind of birds are they?
This reminds me, I was going to put up a photo of my antenna system showing
a group of Cormorants using it as a wayover on their trip South.
Cormorants are *big* birds. Even with the boom truss you can see the sag.
The scans are part of over 20,000 images, so it may take me a while to find
them. Too bad tthey weren't shot with the digital cameras. They'd be a lot
easier to find.
At any rate, IF I find them I'll put some up on a page and post the link.
The occasional Hawk will perch up there, but they are small by comparrison.
Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com
> Interesting story about birds breaking a reflector tip. During the spring
> and fall, I often have so many small migrating birds on my Force 12
> EF-240S
> that they are literally shoulder to shoulder. The elements bend
> dramatically, but always spring back. Occasionally some hawks or turkey
> buzzards will perch on the antenna, but they wisely do not attempt it out
> at the tips, preferring the boom instead.
>
> I'm a little surprised that birds that would try to perch on an element
> tip
> would be so heavy as to break it.
>
> 73, Pete N4ZR
>
> At 10:42 PM 5/3/2005, SJ W3TX wrote:
>
>>I have seven M2 monobanders up.
>>
>>Everything has held up well since 1999! Their designs and QC and customer
>>service have been excellent.
>>
>>I've had two mechanical failures...both were acts of nature that NO design
>>could survive.
>>
>>The first was when a chunck of ice fell off the 40m3 at 120ft and hit a
>>director on the 10m7 at 35 feet. I'm glad it hit the element and not a
>>person or pet!
>>
>>The second was when a flock of birds roosted on the 40m3 reflector
>>creating
>>a force that exceeded the elasticity modulus of the aluminum tip section.
>>The birds were a little surprised, but none got hurt (if they had I could
>>fix the birds...I'm a vet).
>>
>>The birds were back the next day (and every day since) testing the
>>antennas
>>again...so far the antennas are fine! With 41 elements on one pole, all
>>the
>>roosting activity, and the inevitable bird droppings I'm starting to
>>wonder
>>if I can pay for this hobby by starting a guano factory? Maybe I need
>>more
>>elements!!
>>
>>I like the M2 yagi so much I ordered more for future use.
>>
>>73, Scott W3TX
>>
>>
>>_______________________________________________
>>
>>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@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@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@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|