[TowerTalk] Slipp-Nott

[john at kk9a.com]

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 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
> 
> _______________________________________________
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at 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