[TowerTalk] Re: First Tower questions

[Paul Playford]

My tower is overloaded and I know it.  That's why I run it down during the
monsoon wind season as I have observed an 85mph microburst at this QTH.  And
my existing antenna array on the tower survived that (my 80m 4sq didn't)

de Paul, W8AEF

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ZF2TA  FO8DX  FO0PLA  8Q7AA  XZ0A
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----- Original Message ----- 
From: "Alan Beagley" <ab2os at optonline.net>
To: "Paul Playford" <w8aef at worldnet.att.net>
Sent: Saturday, October 25, 2003 2:18 PM
Subject: Re: [TowerTalk] Re: First Tower questions


> On 10/25/03 07:59 pm Paul Playford put fingers to keyboard and launched
> the following message into cyberspace:
>
> > I believe pipe is measured by ID.  Stay away from pipe.  I use a 2"o.d.
x
> > 20' mast in my LM470.  My T2X rotator is perhaps 4 feet from the top of
the
> > tower with a thrust bearing on top of the tower that supports the mast
and
> > monoband 4 element yagis for 10, 15 & 20.  I aligned the thrust bearing
by
> > rotating the mast (clamps loose on rotator) and adjusting the thrust
bearing
> > so there is no mast to tower binding.  I suggest you use the longest
mast
> > you can obtain because you will always wish you had.
>
> But you have to take the length of the mast into account when
> calculating the wind loading (can't remember where I read this -- ARRL
> Antenna book??): the sq.ft. and force specs for the tower assume that
> the antenna is immediately at the top of the tower, not 10' or more above.
>
> Alan AB2OS
>
>
>