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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Mast\s+slipping\s*$/: 54 ]

Total 54 documents matching your query.

21. Re: [TowerTalk] Mast slipping (score: 1): Author: "Al Williams" <alwilliams@olywa.net>; Date: Mon, 23 Apr 2007 11:32:50 -0700; Thank you for the link to the photo of your "new" m2 2800 positioner. It looks identical to my older one which is about 3 years old since purchase. The mfr's spec is the same except that the starting; /archives//html/Towertalk/2007-04/msg00477.html (16,553 bytes)
22. Re: [TowerTalk] Mast slipping (score: 1): Author: <john@kk9a.com>; Date: Mon, 23 Apr 2007 21:01:39 -0400; One could certainly design a better method of clamping than the Orion mast clamp, however apparently the rotator will destruct when connected to very large antennas. I spent some time looking at K7NV; /archives//html/Towertalk/2007-04/msg00485.html (9,032 bytes)
23. Re: [TowerTalk] Mast slipping (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Tue, 24 Apr 2007 09:30:44 -0500; Thanks for posting the flaws again. Looks like one of the recent improvements is removal of the dimples. Both surfaces (front and back) on the mast clamps are now ground off at the factory. Since the; /archives//html/Towertalk/2007-04/msg00490.html (10,314 bytes)
24. Re: [TowerTalk] Mast slipping (score: 1): Author: <donovanf@starpower.net>; Date: Tue, 24 Apr 2007 10:57:15 -0400 (EDT); Hi Keith, Suggest u correspond with Kurt, K7NV. He's the expert on prop pitches these days. k7nv@contesting.com 73! Frank W3LPL (p.s. ask Kurt what the owner of SteppIR uses to turn his MonstIR ...); /archives//html/Towertalk/2007-04/msg00492.html (11,530 bytes)
25. Re: [TowerTalk] Mast slipping (score: 1): Author: K7LXC@aol.com; Date: Tue, 24 Apr 2007 12:07:53 EDT; contact the mast". Actually, for my 2" mast and older positioner (which appears identical as far as the shape, clamping teeth, and bolts are concerned), 12 teeth make contact with the mast. These 12; /archives//html/Towertalk/2007-04/msg00493.html (9,176 bytes)
26. Re: [TowerTalk] Mast slipping (score: 1): Author: K7LXC@aol.com; Date: Tue, 24 Apr 2007 12:35:34 EDT; not rated for very large 3 element 40 meter full sized Yagis (including the SteppIR MonstIR) in strong winds. installations in my local area when used with very large antennas (full size 3 element 40; /archives//html/Towertalk/2007-04/msg00498.html (9,077 bytes)
27. Re: [TowerTalk] Mast slipping (score: 1): Author: <donovanf@starpower.net>; Date: Tue, 24 Apr 2007 15:03:56 -0400 (EDT); Hi Steve, I did not personally see the failed 2800 rotators, but my recollection is that the case failed. 73! Frank W3LPL -- Original message -- _______________________________________________ ______; /archives//html/Towertalk/2007-04/msg00505.html (9,871 bytes)
28. Re: [TowerTalk] Mast slipping (score: 1): Author: "Kurt Andress" <kurt@k7nv.com>; Date: Tue, 24 Apr 2007 18:14:03 -0700; "One could certainly design a better method of clamping than the Orion mast clamp, however apparently the rotator will destruct when connected to very large antennas. I spent some time looking at K7N; /archives//html/Towertalk/2007-04/msg00508.html (10,560 bytes)
29. Re: [TowerTalk] Mast slipping (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Tue, 24 Apr 2007 22:20:54 -0700; I assume that's mostly because the gear train is a back-drivable spur or planetary set as opposed to a worm/pinion? If you overload it, it just turns the motor? Jim, W6RMK ___________________________; /archives//html/Towertalk/2007-04/msg00513.html (8,077 bytes)
30. Re: [TowerTalk] Mast slipping (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Wed, 25 Apr 2007 11:12:13 -0500; I don't think the drive can be back-driven. It's just that you would need about 30,000 in-lbs of torque to break anything. 73, Keith NM5G I assume that's mostly because the gear train is a back-driva; /archives//html/Towertalk/2007-04/msg00522.html (9,183 bytes)
31. Re: [TowerTalk] Mast slipping (score: 1): Author: TexasRF@aol.com; Date: Wed, 25 Apr 2007 12:32:08 EDT; First hand feedback: a full sized 80m 3-el yagi (1200 #) will windmill a large prop pitch with about 45 mph wind. This is for a very well balanced design with equal element spacing. You can't imagine; /archives//html/Towertalk/2007-04/msg00525.html (10,023 bytes)
32. Re: [TowerTalk] Mast slipping (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Wed, 25 Apr 2007 19:00:41 -0500; Let's see... 90 degrees in 5 seconds extrapolates to 360 degrees (1 rev) in 20 seconds, or 3 rpm. I understand most of those prop pitch motors have about 1000 to 1 gear reduction, so the motor must h; /archives//html/Towertalk/2007-04/msg00541.html (8,842 bytes)
33. Re: [TowerTalk] Mast slipping (score: 1): Author: "Dubovsky, George" <George.Dubovsky@andrew.com>; Date: Thu, 26 Apr 2007 08:11:21 -0400; The small p-p gearboxes are closer to 10k:1, and I presume the large are about the same. I would not have thought you could ever back-drive a p-p, but I believe Gerald. That motor must have been LOUD; /archives//html/Towertalk/2007-04/msg00546.html (10,874 bytes)
34. [TowerTalk] Mast slipping (score: 1): Author: "Gregg Seidl" <k9kl@centurytel.net>; Date: Sun, 22 Jul 2012 21:00:17 -0500; I just got down from my tower after turning my XM-240 in line to match the rotor and other antenna AGAIN. I have done this several times now and I just can't get a grip on why this continues to happe; /archives//html/Towertalk/2012-07/msg00246.html (7,961 bytes)
35. Re: [TowerTalk] Mast slipping (score: 1): Author: K8RI <K8RI-on-TowerTalk@tm.net>; Date: Sun, 22 Jul 2012 22:25:50 -0400; It has been my experience...which makes this completely anecdotal: Depending on the clamp, It's not that the galvanizing is too smooth, but at some point if the pressure is great enough, the galvaniz; /archives//html/Towertalk/2012-07/msg00247.html (10,396 bytes)
36. Re: [TowerTalk] Mast slipping (score: 1): Author: "Rich Hallman - N7TR" <rich@n7tr.com>; Date: Sun, 22 Jul 2012 19:41:58 -0700; I modified mine with the hy-gain clamp. Been up for many years and major winds with no problem. I think those cast clamps are pretty cheap from MFJ now. 73. Rich _____________________________________; /archives//html/Towertalk/2012-07/msg00248.html (8,501 bytes)
37. Re: [TowerTalk] Mast slipping (score: 1): Author: K8RI <K8RI-on-TowerTalk@tm.net>; Date: Sun, 22 Jul 2012 23:03:15 -0400; Cast Al tends to be quite granular and under enough pressure will "flake" off if the clamp slips. Once they start flaking they have less gripping capability under the same pressure. I don't know if t; /archives//html/Towertalk/2012-07/msg00249.html (11,102 bytes)
38. Re: [TowerTalk] Mast slipping (score: 1): Author: Frank <frankkamp@att.net>; Date: Sun, 22 Jul 2012 22:19:17 -0500; I used to have problems with mast slippage too. It was aggrevating to have to crank the tower down and re-calibrate. So I pinned the mast to the rotator housing. The next time we had a strong wind I; /archives//html/Towertalk/2012-07/msg00250.html (9,269 bytes)
39. Re: [TowerTalk] Mast slipping (score: 1): Author: "Dino Darling" <dino@kx6d.com>; Date: Sun, 22 Jul 2012 20:21:32 -0700; You see this a lot with chrome moly masts. I highly recommend the use of DX Engineering clamps in place of almost any other clamp! The increased surface area of the clamp works great! http://www.dxen; /archives//html/Towertalk/2012-07/msg00251.html (9,525 bytes)
40. Re: [TowerTalk] Mast slipping (score: 1): Author: Grant Saviers <grants2@pacbell.net>; Date: Sun, 22 Jul 2012 20:43:42 -0700; I'll second the motion that the DX Eng saddle clamps are the way to go. Lots of surface area of the saddle in contact with the mast and stainless u-bolts are provided. Use a SS nylock nut backing up; /archives//html/Towertalk/2012-07/msg00252.html (9,497 bytes)

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