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Re: [TowerTalk] Straightening 45g tower base

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Straightening 45g tower base
From: john@kk9a.com
Date: Tue, 07 Jul 2020 10:47:32 -0500
List-post: <mailto:towertalk@contesting.com>
Some of the tower products that I have purchased were also very unprecise. I understand shimming the flange to plum the sections but what are you re-drilling?

John KK9A


Blake N6BNS wrote:

That’s right, it’s the solid rod version. At the moment I’m only looking at putting up a VHF/UHF vertical (Diamond X300NA), but that could change someday so I’d like to get this as right as possible.

Thank you to everyone for your comments and suggestions! I decided to use some washers on the low leg to bring the tower closer to plumb, and then drill new mounting bolt holes 90° from the existing ones. Interestingly, it turns out the base wasn’t too far off, but the first segment appears to have a poorly manufactured leg—the tilt followed one leg as I tried the segment in all three orientations.

Now the tower is no more than 0.3° from plumb in any direction.

Let’s hope the rest of the segments don’t suffer from the same issue…

--
Blake Sobiloff (N6BNS)
Reno, NV (USA)

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