[TowerTalk] Slipp-Nott

[Roger (K8RI) on TT]

On 12/20/2013 8:18 AM, john at kk9a.com wrote:
>   
>
> 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.

It appears to be a split mast sleeve with the two halve of the body made 
of plastic encased in a steel frame.  The diagram shows two empty 
shells.  The plastic would deform under pressure, giving an even 
pressure on the split sleeve/collar . The gripping force can be altered 
just by tightening the bolts. Depending on the material it looks like an 
ingenious way to get even gripping all the way around. At least that's 
what it looks like to me.

73

Roger (K8RI)

>
> 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 at kk9a.com
>> Sent: December 19, 2013 20:45
>> To: TOWERTALK at 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 at contesting.com" <towertalk at contesting.com>
>> Subject:[TowerTalk] Slipp-Nott
>> From:dave arruzza <w1ctn at yahoo.com>
>> Reply-to:dave arruzza <w1ctn at yahoo.com>
>> Date:Thu, 19 Dec 2013 13:07:31 -0800 (PST)
>> List-post:<towertalk at contesting.com">mailto:towertalk at 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
>>
>> _______________________________________________
>>
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>   
>
> Links:
> ------
> [1] http://lists.contesting.com/mailman/listinfo/towertalk
> [2] http://www.tennadyne.com/slipp_nott.htm
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