Re: [TowerTalk] Slipp-Nott

["K0DAN" <k0dan@comcast.net>]

Actually the T10 is quite well balanced (weight wise!) at the center, and 
being light weight it quite easy to manage on the tower. The boom length is, 
I think, 28' and the longest elements are around 32'. What twists it is not 
so much its mass, but the torque out on the ends. Probably not much more or 
less than a tribander.
I failed to mention my mast is pinned inside the rotor (Yaesu G2800) clamps 
so whatever made my antenna spin was probably a high gust of wind that 
caught the antenna at just the right place and time.
After correcting that problem last year, I have not had it recur.

Doesn't look like the Slipp-Nott will add any value at this installation.

73
dan
k0dan

-----Original Message----- 
From: john@kk9a.com
Sent: December 20, 2013 07:18
To: K0DAN
Cc: TOWERTALK@contesting.com
Subject: Re: [TowerTalk] Slipp-Nott



The T10 boom is not that long however I imagine that the log periodic in
not balanced as well as a conventional yagi. Even with some extra torque
from imbalance it not be that difficult to make a mast clamp that does
not slip without having to add outriggers. The Slipp-Nott
http://www.tennadyne.com/slipp_nott.htm [2] appears to use mast sleeves.
It has no finish shown so I am hoping that it is made from stainless
steel.

John KK9A

On 2013-12-19 22:29, K0DAN wrote:

> I have a T10 on a nominal 2" mast. It has been up since around 1999. It 
> was
> put up before SlippNott was available.
>
> I am in Kansas City area, subject to weird WX including occasional ice
> loading and high winds. The T10 does not have much wind load but I think 
> can
> put some leverage on the boom.
>
> A few times in the life of my T10, it (or the mast) slipped, moving as 
> much
> as 45 degrees. It's a heavy tower, rotor, thrust bearing, good hardware, 
> all
> heavy duty install which has withstood a lot of torture. I repositioned 
> T10
> and reset the nuts/bolts, and all has been good for a year. After the last
> bolt-nut reunion, I couldn't move the T10 boom no matter how hard I leaned
> or swung on it. Original T10 hardware was still holding fine. Whatever 
> made
> the antenna (but a smaller VHF array NOT move) is a mystery...go figure.
>
> After that event I thought the SlippNott might be good preventative
> maintenance, but I never did anything about it, and since then have not 
> had
> any wind-related rotation. So I'm also interested in the value-add for
> SlipNott + type of antenna/
>
> 73
> dan
> k0dan
>
> -----Original Message----- 
> From: john@kk9a.com
> Sent: December 19, 2013 20:45
> To: TOWERTALK@contesting.com
> Subject: Re: [TowerTalk] Slipp-Nott
>
> The T10 is not a huge antenna, it should not slip on the mast. Rather than
> put a band aid on it, I would look and the mounting plate and clamping. Is
> the plate strong enough or is it bending? What type of mast clamps does 
> this
> use? How many clamps are there? I am using DX Engineering saddle clamps on
> significantly larger antennas and have yet to see any slippage.
>
> John KK9A
>
> To:"towertalk@contesting.com" <towertalk@contesting.com>
> Subject:[TowerTalk] Slipp-Nott
> From:dave arruzza <w1ctn@yahoo.com>
> Reply-to:dave arruzza <w1ctn@yahoo.com>
> Date:Thu, 19 Dec 2013 13:07:31 -0800 (PST)
> List-post:<towertalk@contesting.com">mailto:towertalk@contesting.com>
>
> To all...
> I have a Tennadyne T10 that recently has started to slip on the mast. No
> matter
> how much I tighten the clamps slippage eventually returns and then I am 
> off
> the
> bearing the rotor displays.
>
> Tennadyne markets the Slipp-Nott. Does anyone on the reflector have real
> world
> experience using this item. Does it really work?
>
> 73
> Dave
> W1CTN
> Radio Ansonia
>
> _______________________________________________
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk [1]


Links:
------
[1] http://lists.contesting.com/mailman/listinfo/towertalk
[2] http://www.tennadyne.com/slipp_nott.htm
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