Tom:
Mine creaks (and pops) too, and it is the new design with sleeved joints. If
yours is this design (post 1995), tightening the bolts will not help because
there is minimum gripping pressure at the joints. All of the leg loads are
carried by the bolts, which are virtually a press fit. It is my belief the
creaking/popping is caused by minor changes in the alignments at the joints
due to the natural flexing that occurs in aluminum. In this more recent
design the bolt holes will NOT elongate because the bearing strength is well
below the point of deformation, even at rated wind loads. I know this
because I have reviewed the PE analysis of this design in great detail.
73s
Bob, W5LT
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com]On Behalf Of
towertalk-request@contesting.com
Sent: Friday, March 28, 2003 11:10 AM
To: towertalk@contesting.com
Subject: TowerTalk Digest, Vol 3, Issue 51
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Today's Topics:
1. Heights (Tom Branch)
2. Dayton Contest Dinner 2003 **UPDATE** (Tim Duffy K3LR)
3. Re: need 24 volt 6amp PS (Jimmy Weierich)
4. Neighbors...(Thanks!!) (Jerry K3BZ)
5. Re: Heights (Don Havlicek)
----------------------------------------------------------------------
To: <towertalk@contesting.com>
Date: Thu, 27 Mar 2003 12:33:25 -0600
From: "Tom Branch" <tom@k4nr.org>
To: <TowerTalk@contesting.com>
Subject: [TowerTalk] Heights
Message-ID: <003801c2f48f$5b0bdd00$0200a8c0@verizon.net>
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Greetings,
I've noticed the my Heights tower "creaks" when the wind is blowing. I've
tightened all the bolts so I'm hoping this is "normal"...
Tom
tom@k4nr.org
http://www.k4nr.org
------------------------------
To: <towertalk@contesting.com>
Date: Thu, 27 Mar 2003 13:58:18 -0600
From: Tim Duffy K3LR <k3lr@k3lr.com>
To: cq-contest@contesting.com, towertalk@contesting.com, ncc@contesting.com,
mrrc@contesting.com, yccc@contesting.com
Subject: [TowerTalk] Dayton Contest Dinner 2003 **UPDATE**
Message-ID: <3E8357DA.3B05C44D@k3lr.com>
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UPDATE MARCH 27, 2003
*** K1QX reports that ticket orders are ahead of last year.
**** Do not wait until the last minute to place your order as
there may not be tickets left.
***** Current ticket orders will be filled and mailed no later
than April 8th.
The North Coast Contesters are pleased to announce:
The 11th Annual Dayton Contest Dinner
Tickets are on sale NOW.
Master of Ceremonies is Tim Duffy, K3LR
The 2003 Contest Hall of Fame Inductions will be formally announced by
the CQ WorldWide Contest Director and CQ Contest Hall of Fame member,
Bob Cox, K3EST.
We are honored to have Rich Strand, KL7RA as our dinner speaker.
The dinner will be held on Saturday night, May 17, 2003 at 6:30 PM:
Cash bar opens at 5:30 PM.
Located at the Crowne Plaza Hotel (Official Contest Hotel)
5th and Jefferson Streets (Next to the Convention Center)
Dayton (Downtown), Ohio in the VAN CLEVE BALLROOM
Menu: Prime Rib of Beef, Potato, vegetables, rolls, chocolate fudge
cake, choice of beverage, coffee, tea or iced tea.
*** Vegetarian menu available by request at the dinner.
Price is $31.00 per person.
**** SEATING IS LIMITED TO 300, SO ORDER YOUR TICKETS EARLY ****
Seating is random and is not reserved. Tables are set in rounds or 8.
All dinner ticket orders are handled exclusively by Craig Clark, K1QX
at:
Radioware and Radio Bookstore
PO Box 209
Rindge, NH 03461
http://www.radio-ware.com
You can place your order by calling:
Monday through Friday from 10 AM to 6 PM eastern USA time.
1-800-457-7373
1-603-899-6957 for International
or by FAX 1-603-899-6826 24 hours
You can also EMAIL your orders to: jcclark@prexar.com
Visa, Mastercard, American Express. Sorry no COD orders.
EMAILs must include charge card + number, callsign and return address
information.
Tickets will be sent via First Class US Mail no later than May 7, 2003.
Please allow plenty of time for your tickets to arrive before you leave
for Dayton.
Radioware and Radio Bookstore is not responsible for tickets lost in the
mail.
*** Special thanks to Craig Clark, K1QX and Radioware - Radio Bookstore
for once again handling the tickets ***
Deadline for ticket orders is May 6, 2003. NO EXCEPTIONS
There will be no tickets at the door.
Many contest operators from around the world attend this event. If you
enjoy radio contesting, you do not want to miss this dinner.
We expect a quick sell out. Order your tickets early!
73!
Tim K3LR
http://www.k3lr.com
------------------------------
To: <towertalk@contesting.com>
Date: Thu, 27 Mar 2003 15:42:20 -0500
From: Jimmy Weierich <kg2au@stny.rr.com>
To: KB2HUK@aol.com, towertalk@contesting.com
Subject: Re: [TowerTalk] need 24 volt 6amp PS
Message-ID: <a05111b00baa911f5386c@[24.24.89.136]>
In-Reply-To: <3f.1a4fc278.2bb38362@aol.com>
References: <3f.1a4fc278.2bb38362@aol.com>
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$16 if a switcher will do the job:
http://www.mpja.com/productview.asp?product=14178+PS
KB2HUK Wrote:
>Hello all ! I need a 24 vollt 6 -8 amp power supply for a new alfa spid
>rotor . Is there any one who knows where I might find one ? thanks John
>kb2huk
--
Jimmy Weierich, K2LV, ex KG2AU <kg2au@stny.rr.com>
Vestal, NY USA FN12xa
------------------------------
To: <towertalk@contesting.com>
Date: Thu, 27 Mar 2003 21:35:57 -0500
From: Jerry K3BZ <k3bz@arrl.net>
To: "(Reflector) TowerTalk" <towertalk@contesting.com>
Subject: [TowerTalk] Neighbors...(Thanks!!)
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Reply-To: Jerry K3BZ <k3bz@arrl.net>
Message: 4
Thanks to the many that gave me some very good ideas and suggestions how to
deal with this. The problem doesn't seem to be as big as we first thought,
and it appears to be manageable. Much appreciated, gents.
Jerry K3BZ
------------------------------
To: <towertalk@contesting.com>
Date: Fri, 28 Mar 2003 09:04:46 -0500 (EST)
From: Don Havlicek <n8de@thepoint.net>
To: <tom@k4nr.org>
Cc: TowerTalk@contesting.com
Subject: Re: [TowerTalk] Heights
Message-ID: <2288.66.103.250.83.1048860286.squirrel@mx2.confluentasp.com>
In-Reply-To: <003801c2f48f$5b0bdd00$0200a8c0@verizon.net>
References: <003801c2f48f$5b0bdd00$0200a8c0@verizon.net>
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Message: 5
Tom,
This may have been addressed before on the reflector.
What you have is elongation of the bolt holes in the tower.
PLEASE, for you own safety, take down the tower and inspect ALL the bolt
holes, especially those INNER holes which are hidden from view.
I am certain that you will discover they are no longer ROUND, but
elongated, making for an UNSAFE condition.
Tightening the bolts will NOT improve the safety factor much, as the tower
will still be slipping in the joints due to that elongation.
How to eliminate the problem? IMHO, you must place another bolt at each
joint where elongation has occurred, perhaps above, below, or between the
present bolts.
Good Luck
Don
N8DE
> Greetings,
>
> I've noticed the my Heights tower "creaks" when the wind is blowing.
> I've tightened all the bolts so I'm hoping this is "normal"...
>
> Tom
>
> tom@k4nr.org
> http://www.k4nr.org
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
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End of TowerTalk Digest, Vol 3, Issue 51
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