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Total 199 documents matching your query.

21. [TowerTalk] Corrosion Protection (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Sun, 2 Jun 2019 08:28:29 -0500
I've been researching ways to protect my guy anchors from corrosion, and I'd like to share a few things I've learned. (After almost 30 years in Wisconsin clay, the 5/8 inch rods were rusty, but showe
/archives//html/Towertalk/2019-06/msg00002.html (9,826 bytes)

22. Re: [TowerTalk] tower fatality (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Sun, 16 Jun 2019 20:52:46 -0500
On 6/16/2019 15:00, Dick Green WC1M wrote: You put the temporary guys on with the base section on the ground, then with at least one helper you lift the base section onto the pier pin. Then, with at
/archives//html/Towertalk/2019-06/msg00096.html (8,397 bytes)

23. Re: [TowerTalk] tower fatality (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Mon, 17 Jun 2019 21:40:45 -0500
The contractor I hired to take down my old tower, also Rohn 25, just sent a worker up to the top to cut the upper guys.  That left the 70 foot tower held up only by the lower guys. They did put some
/archives//html/Towertalk/2019-06/msg00104.html (13,273 bytes)

24. Re: [TowerTalk] Tower Fatality (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Tue, 18 Jun 2019 12:26:48 -0500
They did loosen the guys first. The tower worker was about 30 feet above the lower guys. 73, Scott K9MA -- Scott Ellington -- via iPad _______________________________________________ ________________
/archives//html/Towertalk/2019-06/msg00107.html (8,382 bytes)

25. Re: [TowerTalk] Tower Fatality (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Tue, 18 Jun 2019 21:33:55 -0500
I have to stand on the top of my 25G, too, but I'm not crazy about it. The 503 insulators in the new guys are so heavy that even fully tensioned there's a bit of sag, so the tower can wobble around a
/archives//html/Towertalk/2019-06/msg00110.html (9,875 bytes)

26. [TowerTalk] CNT400DB UV Resistance (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Sat, 22 Jun 2019 20:18:20 -0500
I have a source of Andrew CNT400DB, which I was planning to use on the new tower. However, it's a "direct burial" cable, and I'm not sure the jacket is UV resistant. The specs say only that the jacke
/archives//html/Towertalk/2019-06/msg00112.html (6,940 bytes)

27. Re: [TowerTalk] Wire antenna? (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Mon, 1 Jul 2019 18:17:00 -0500
I've long been a fan of the EFHW for portable operation, but I've always used a tuner. There seems to be a lot of aversion to tuners. If you can get over that, many possibilities open up. A simple L-
/archives//html/Towertalk/2019-07/msg00008.html (10,533 bytes)

28. Re: [TowerTalk] Wire antenna? (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Mon, 1 Jul 2019 23:27:35 -0500
For an end fed wire, this is not true. Its pattern has 4 lobes, a cloverleaf. It is like a full wave fed 1/4 wave from one end. That's two half waves OUT of phase. A center fed full wave is indeed tw
/archives//html/Towertalk/2019-07/msg00023.html (8,963 bytes)

29. Re: [TowerTalk] Wire antenna? (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Tue, 2 Jul 2019 13:56:02 -0500
I wouldn't say quite random; they just have lots of lobes. A model will give you a pretty good idea of the pattern. The big unknown will always be the ground system loss, but that doesn't affect the
/archives//html/Towertalk/2019-07/msg00035.html (9,667 bytes)

30. Re: [TowerTalk] Fall Zone (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Mon, 8 Jul 2019 13:55:59 -0500
The local code here just prohibits it from falling across public property, like a sidewalk. That's just so the city doesn't get sued, I presume. Considering that one modest limb of an oak tree weighs
/archives//html/Towertalk/2019-07/msg00100.html (8,936 bytes)

31. [TowerTalk] Outdoor HV Cables (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Tue, 16 Jul 2019 19:46:45 -0500
Just in case this is of use to others: I needed to make some jumpers to go from the bottom end of my shunt feed gamma matches to the tuner. There's about 5 kV on the 80 meter one, so I wanted high vo
/archives//html/Towertalk/2019-07/msg00169.html (7,282 bytes)

32. [TowerTalk] A3S Traps (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Wed, 17 Jul 2019 23:35:06 -0500
I recently bought some replacement traps for my old A3S from MFJ/Cushcraft. Unike the originals, the replacements have no vent holes. Among other problems, the original traps tended to collect moistu
/archives//html/Towertalk/2019-07/msg00201.html (6,660 bytes)

33. Re: [TowerTalk] A3S Traps (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Thu, 18 Jul 2019 11:56:35 -0500
Cushcraft confirms that the traps are supposed to have vent holes, like the originals. I've had to modify the other traps to enlarge the holes and cover them with screen to keep bugs out, so I'll jus
/archives//html/Towertalk/2019-07/msg00215.html (9,876 bytes)

34. Re: [TowerTalk] Have you had success with .... (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Sat, 20 Jul 2019 20:31:51 -0500
Well, if you make it strong enough....... 73, Scott K9MA I have had fullsize 40 meter beams for 28 years. No rope, no end caps - no failures. 73 Tim K3LR -- Scott K9MA k9ma@sdellington.us ___________
/archives//html/Towertalk/2019-07/msg00272.html (10,081 bytes)

35. Re: [TowerTalk] Have you had success with .... (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Sat, 20 Jul 2019 20:47:48 -0500
My TH7, assembled according to the manual with ropes and end caps, was up for almost 30 years, with no failures. I do wish I had noticed before I put it up that a few of the parts weren't stainless.
/archives//html/Towertalk/2019-07/msg00276.html (10,277 bytes)

36. Re: [TowerTalk] Have you had success with .... (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Sat, 20 Jul 2019 21:49:55 -0500
Hi Tim, I know aluminum has a finite fatigue life, no matter how low the stress, but how do you know when to replace an antenna, unless it has failed? 73, Scott K9MA -- Scott K9MA k9ma@sdellington.us
/archives//html/Towertalk/2019-07/msg00280.html (10,647 bytes)

37. Re: [TowerTalk] The TH7 and Damping Rope (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Sat, 20 Jul 2019 21:56:33 -0500
My TH7 is not as old, 1989 vintage. I haven't tried to get the element segments apart since I took it down this spring. I never had any trouble with it, but about 5 years ago I discovered that the bo
/archives//html/Towertalk/2019-07/msg00282.html (13,588 bytes)

38. Re: [TowerTalk] Grounding (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Wed, 4 Sep 2019 16:46:03 -0500
My tower hasn't been hit yet, but something about a half mile away got seriously hammered the other night. I haven't heard of any damage, but it must have awakened the whole neighborhood. Just a litt
/archives//html/Towertalk/2019-09/msg00082.html (15,462 bytes)

39. Re: [TowerTalk] Grounding (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Wed, 4 Sep 2019 20:16:27 -0500
My theory has always been that, with the station equipment well bonded together, it is safe to leave the ground connected, as long as EVERYTHING else is disconnected. That leaves no path for current
/archives//html/Towertalk/2019-09/msg00091.html (10,343 bytes)

40. Re: [TowerTalk] Shunt Feeding a Vertical (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Thu, 5 Sep 2019 19:27:39 -0500
I must disagree. Ive been shunt feeding a 21 meter tower on 160 for years, with a simple gamma match. At most, it is electrically 3/16 wavelength. See ON4UNs book. 73, Scott K9MA -- Scott Ellington.
/archives//html/Towertalk/2019-09/msg00144.html (8,105 bytes)

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