It would certainly seem like it, but I'm not so sure. Most of the
better antennas work well once tuned up and may work great for some
years. The C3i antennas were great performers for some years. Yet when
taken down, the coax match on all had the solder dissolved to the point
where the matching section was no longer connected. They would have
stayed up for 4 or 5 more years before they failed, but a flock of
Cormorants decided "THAT C3i 7L 6-meter antenna" was going to be their
roost. So I think failures are often attributed to the weather or age
rather than design.
I found a broken element tight at the first rivet on the C19XR.
Admittedly it was from rough handling. My wife had some neighbors move
the antenna (on saw horses) when I wasn't available to help. Holes in
elements weaken them at that point, so I'd want that first rivet a
little farther back so the larger tube would support the smaller at the
weakest point.
Loose rivets? I wonder if that was an installation problem? With pop
rivets even cleaning the hole out with even a 1/64th over size drill
would likely be a source for problems. Pop rivets should be snug. If
installed one-at-a-time the following rivets may not want to go in,
resulting in a hole being redrilled
73
Roger (K8RI)
On 3/9/2016 Wednesday 8:21 PM, Kelly Taylor wrote:
Isn’t a lot of this talk a bit of picking the pepper?
If joint conductivity of aluminum elements was a serious issue, wouldn’t we have heard
something about it in the, what, 60 years we’ve been using aluminum tubing for antenna
elements?
73, kelly, ve4xt
On Mar 9, 2016, at 6:36 PM, George Dubovsky <n4ua.va@gmail.com> wrote:
If you weld the aluminum tubing, you destroy the heat treatment in the Heat
Affected Zone, resulting in a much weaker element.
73,
geo - n4ua
On Wed, Mar 9, 2016 at 6:43 PM, Tom_N2SR via TowerTalk <
towertalk@contesting.com> wrote:
If you weld the tubing together, what is the wind rating then? Kind of
difficult to get apart, but very little risk of losing electrical contact,
rivets failing, rusted screws, etc.
Someone should try it and report their results.
Tom, N2SR
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73
Roger (K8RI)
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