I believe that the rope in the elements, specifically the element tips, is
particular to the Hy-Gain yagis, at least the 20, 15, and 10 meter designs. I
have seen a Hy-Gain yagi, a 5 element 15 meter yagi, with most of its element
tips broken off by regularly occurring, but not huge, winds. The yagi was built
without the rope in the element tips that is shown in the manual for the
antenna.
I replaced the element tips in 1992, with the rope in the tips per the
instructions in the manual, and did not have any element tips break off during
the next 17 years of service at the same location.
Just sharing my experience.
73, Rich, N6KT
On Saturday, July 20, 2019, 05:17:53 PM PDT, Tim Duffy <k3lr@k3lr.com>
wrote:
Hello Tom:
I have 26 Yagi's in the air here and my experience is the same as yours. No end
caps ever on the elements and no problems. Also no water related corrosion
issues.
Every time I am involved in a takedown of a Yagi for a friend ham - and there
are caps - there is water inside.
Condensation is a real problem and taking steps to deal with it (dry) slows the
aluminum corrosion process.
I have never used rope in elements - no breakage here.
I must be lucky :-)
73
Tim K3LR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Tom_N2SR
via TowerTalk
Sent: Saturday, July 20, 2019 8:09 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Have you had success with ....
Helped a friend take down his old Mosley CL-33 (being replaced with a C19XR
soon). I rigged the antenna to lower it, and when I pulled the U bolts, the
antenna wanted to flip backwards - because of the water in the boom - because
he put the caps on.
All of my antennas (Force 12) have no caps on the boom nor elements. Have had
zero problems with spiders, bees, wasps or other flying creatures.
73,
Tom, N2SR
On Saturday, July 20, 2019, 12:42:44 PM EDT, Tim Duffy <k3lr@k3lr.com>
wrote:
Hello Bob:
How do you get the water out of your elements with caps on them?
73
Tim K3LR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Bob
Shohet, KQ2M
Sent: Saturday, July 20, 2019 12:31 PM
To: john@kk9a.com; towertalk@contesting.com
Subject: Re: [TowerTalk] Have you had success with ....
My experiences have been different from KK9A. Open element tips with nothing
capping them, is just an invitation for spiders, bees, wasps and other flying
creatures to nest in them (extremely common here in the deep forests of Western
CT) and their nests block the drainage of water, trapping it inside for it to
freeze and split the element. Or, the water stays inside and the weight builds
up adding to the potential weight and torque imbalances in a heavy wind.
Prior to my living here I really didn’t think that spiders would want to climb
much less nest in anything 130’ off the ground. I was wrong. And the
bee/wasp/flying insect issue was a problem with element tips too. Now I don’t
ever have a problem with them in my antennas because they can’t get in because
I cap and seal the ends. Antennas that use traps have an even bigger potential
problem – there have been many past posts on this reflector on the topic of
trap failures because of nesting insects.
CAUTION: Different qth’s have different climates and different critters. Be
sure that you know what you are dealing with BEFORE you make a choice to not
cap your element tips.
73
Bob KQ2M
From: john@kk9a.com
Sent: Saturday, July 20, 2019 11:54 AM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Have you had success with ....
I have been using NO end caps for decades. There is nothing to fall
off and nothing to seal water inside the boom or elements which would
cause severe damage.
John KK9A
Charles Morrison N1RR wrote:
Have you had success with:
Hot glue gun to attach vinyl end caps to aluminum yagi tips or boom ends ?
-Charlie N1RR
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