Been there, done that (with a Yaesu G-2800DXA). Not easy, but definitely
possible. Prepare for a long stay up there; be patient. Bring a spare battery
for your cordless drill, or use a real drill that you plug into an AC outlet
with a loooong extension cord. Unless you have a really steady hand, you will
unavoidably widen the hole you start at if it's a Yaesu aluminum mast bracket.
Lee, KI7UR
Lee K. Brown MD
Professor of Internal Medicine
Department of Internal MedicineProfessor of PediatricsUniversity of New Mexico
School of Medicine
Professor of Electrical and Computer Engineering
University of New Mexico School of Engineering
Albuquerque, NM
-----Original Message-----
From: Kim Elmore <cw_de_n5op@sbcglobal.net>
To: Les Brown <lesbrown@sympatico.ca>
Cc: towertalk@contesting.com
Sent: Tue, Jul 28, 2020 6:50 pm
Subject: Re: [TowerTalk] Mast slippage
This will be challenging. You need very hard bits (real cobalt bits, not just
the gold colored ones), plenty of cutting oil, patience (because you’ll have to
go slow), and lots of stamina (because as you go slow you’ll have to apply lots
of pressure).
Kim N5OP
"People that make music together cannot be enemies, at least as long as the
music lasts." -- Paul Hindemith
> On Jul 28, 2020, at 6:06 PM, Les Brown <lesbrown@sympatico.ca> wrote:
>
> I have 2 large Yagis attached to a 3 inch OD ¼ inch wall thickness Chromoly
> mast running down the tower to a ProSisTel PST-71D. On a windy day, I hear
> creaking sounds from the tower. The mast is slipping slightly in the rotator
> mast bracket. I’ve already tried to tighten the 6 bolts, but it still slips.
> I don’t want to tighten them to the point where they might snap. I’m
> thinking that what I need to do is to go up the tower, drill a hole through
> the mast (the rotator mast bracket already has holes), and pin the mast and
> bracket. I understand that it’s not easy drilling through Chromoly pipe, so
> before I try this, I thought I would ask if any of you have any other
> suggestions.
>
> 73, Les VE3NNT
>
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