Patrick
Please suggest some stocking suppliers and models.
Grant KZ1W
On 1/4/2013 10:52 AM, Patrick Greenlee wrote:
Plastic owls and rubber snakes work for some folks but are not
universally successful.
Ultrasonic emissions have a much higher success record. Ultrasonic
waves are easy to "beam" directionally which permits a ground or near
ground level installation with the transducer(s) aimed up to where the
birds like to perch. Aiming the sound upward keeps from disturbing
the dogs and cats.
These devices are available COTS for relatively little money or easily
built by the electronic savvy. Mine have lasted for many years and
still work well. Some of these devices offer choices on the type of
output. A randomly occurring warble tone similar to the "yelping
style" public safety sirens (but of course in the ultrasonic spectrum)
seems to work best. Having it come on at random intervals works best
and keeps the birds from getting used to it.
Inexpensive "tweeters" of the horn variety work well, especially if
the design lends itself to accepting a drain hole for water (well...
it is aimed up) Alternatively an enclosure with a hard flat reflective
surface to aim the beam upward will work.
I have used these for many years with great success, not only for
birds but other pests as well when coupled with IR motion detector
including cats and dogs who used to think my yard a public restroom
and the odd skunk, raccoon, armadillo, or opossum.
Patrick AF5CK
iginal Message----- From: Jim Lux
Sent: Saturday, December 29, 2012 5:16 AM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Bye Bye Birdies
On 12/28/12 9:11 PM, Bob K6UJ wrote:
Another option for bird control is to get one of the plastic owls and
put him up on the tribander.
My results were negative, evidently the birds in our area aren't
scared of owls because the owl didn't help at all.
When i took it down I discovered the birds had crapped all over it.
:-)
my in-laws experience with their vineyard was that birds are discouraged
by novelty and change. reflective ribbons one week, owls the next, etc.
That doesn't lend itself to antennas
the other strategy which seems to work quite well is to make what ever
it is "not sittable on". those funky plastic spiky things or
string/monofilament.
Of course, neither of the latter are particularly easy to do on
something like a multielement beam, especially if you want it to last
for decades.
For ordinary wire antennas.. I suppose, if you use strong enough copper
clad steel, the birds can just sit on the wire forever.
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