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41. Re: [TowerTalk] Freight charges when shipping towers (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Mon, 6 Jul 2015 07:20:58 -0700
Might check around with local horse folks. A horse trailer is typically two stalls, floor close to ground, and a nice tilt-out shallow-angle loading ramp. Relatively easy to load a tower, pieces of p
/archives//html/Towertalk/2015-07/msg00087.html (10,664 bytes)

42. Re: [TowerTalk] Static Discharge Porcupines? (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Fri, 7 Aug 2015 22:33:23 -0700
An intriguing foto shows how lightning struggles to find "ground" -- http://www.boredlion.com/50-objects-from-the-past-present-and-future-that-will-turn-your-world-upside-down-pics/26/?v=p Don N7EF _
/archives//html/Towertalk/2015-08/msg00142.html (9,129 bytes)

43. Re: [TowerTalk] Fwd: Static Discharge Porcupines? (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Mon, 10 Aug 2015 21:05:44 -0700
Famed Brazil Christ statue has multiple spines visible 45 sec into video... https://www.youtube.com/watch?v=3e09W-CBGBA But sounds like they are still getting hit.... Don N7EF _______________________
/archives//html/Towertalk/2015-08/msg00214.html (9,333 bytes)

44. Re: [TowerTalk] weather station on tower? (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Tue, 1 Sep 2015 08:09:30 -0700
We have been measuring wind here continuously for 40 years -- currently, for last 2 years, have a 900mhz Davis Vantage Vue Model #6351 wireless mounted up 25' on a 2-foot arm facing into the directio
/archives//html/Towertalk/2015-09/msg00011.html (12,289 bytes)

45. Re: [TowerTalk] Phillystran (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Fri, 23 Oct 2015 10:51:45 -0700
For completeness in the Phillystran discussion, the "Lok-Cube" should perhaps be mentioned. These were provided with 1990-vintage KT34XA antennas to terminate the 1/8" Philly boom truss.. This item i
/archives//html/Towertalk/2015-10/msg00207.html (10,520 bytes)

46. Re: [TowerTalk] cell phone antenna on ham tower? (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Wed, 28 Oct 2015 03:47:37 -0700
Even with the potential hassles mentioned, when cell tower folks come around lusting for your tower, it is still a Golden Opportunity. We tested their level of desperation. When the Cell Guys knocked
/archives//html/Towertalk/2015-10/msg00295.html (14,152 bytes)

47. Re: [TowerTalk] [Bulk] Thrust Bearings (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Sun, 1 Nov 2015 11:37:55 -0800
The W8JGU Sidemount is reviewed by Randy K5ZD in a late 1980's issue of NCJ. Very simple. It uses *No* precision ball or roller bearings. The radial loads are taken by a rotating pipe inside a slight
/archives//html/Towertalk/2015-11/msg00015.html (10,956 bytes)

48. Re: [TowerTalk] Erecting tower sections solo (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Wed, 2 Dec 2015 14:39:41 -0800
We erected 80' of Rohn 25 solo. First section was in the concrete base. We used a hand-cranked boat winch, 1/8" steel cable, which attached to the tower side tubes, with two u-bolts, anywhere desired
/archives//html/Towertalk/2015-12/msg00034.html (10,363 bytes)

49. Re: [TowerTalk] ground rods and angle... (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Tue, 19 Jan 2016 11:31:49 -0800
Might exercise caution on what chemicals are getting dumped into the ground. Check fed, state, local regs.if uncertain. e.g., some fly ash contains arsenic. Would not want to inadvertently turn your
/archives//html/Towertalk/2016-01/msg00358.html (11,131 bytes)

50. [TowerTalk] 160-foot tower in Oregon...Cheap(??) (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Thu, 4 Feb 2016 12:14:46 -0800
http://www.publicsurplus.com/sms/auction/view?auc=1537335 _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.c
/archives//html/Towertalk/2016-02/msg00026.html (6,991 bytes)

51. Re: [TowerTalk] Temporary guys ??? (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Wed, 10 Feb 2016 09:39:56 -0800
This plan sounds a bit scary. With a jury-rigged gin-pole (or not?), whatever you do, you want to have a well-thought-out serious safety plan in place so that, however you do it, a tower section cann
/archives//html/Towertalk/2016-02/msg00124.html (11,616 bytes)

52. Re: [TowerTalk] OT but relevant (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Fri, 26 Feb 2016 05:26:50 -0800
The results ot 1991 US Army testing of pacemakers in *EMP*,, are discussed in http://www.dtic.mil/dtic/tr/fulltext/u2/a242990.pdf At that time, the latest ones were OK, the old ones had problems....
/archives//html/Towertalk/2016-02/msg00302.html (9,999 bytes)

53. Re: [TowerTalk] AES SK (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Thu, 7 Jul 2016 05:15:12 -0700
Geezerz are croaking, shortage of new blood, and not that much business to go around... also $30 Baofengs etc.direct from Amazon.... Don N7EF _______________________________________________ _________
/archives//html/Towertalk/2016-07/msg00129.html (9,390 bytes)

54. Re: [TowerTalk] Updated: How to dig tower base hole effortlessly (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Tue, 13 Sep 2016 02:04:41 -0700
The true beauty of this water-drilled excavation method is it can be done to a large extent without damaging any underground services or structure. You could see in the video what appeared to be unaf
/archives//html/Towertalk/2016-09/msg00259.html (10,743 bytes)

55. Re: [TowerTalk] Updated: How to dig tower base hole effortlessly (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Tue, 13 Sep 2016 06:55:05 -0700
hydro excavation http://hydroexcavation.com/information/ works in most soils, even the hard-packed clay in our area that you can't shovel without first picking to break it up. Don N7EF ______________
/archives//html/Towertalk/2016-09/msg00264.html (8,924 bytes)

56. Re: [TowerTalk] March QST cover (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Mon, 27 Feb 2017 09:19:49 -0800
The editors were likely too distracted by the Cover_Babe to pay much attention to the finer points of tower-climbing equipment. Think of it as something akin to a QST Swimsuit Issue.... Don N7EF ____
/archives//html/Towertalk/2017-02/msg00516.html (10,488 bytes)

57. Re: [TowerTalk] G2800 Rotor issue (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Wed, 22 Mar 2017 02:41:19 -0700
Now, if you had a solar-powered GPS sensor mounted on each end of the boom, wirelessly transmitting those two positions to a receiving unit in your shack, the azimuth of the boom could be computed an
/archives//html/Towertalk/2017-03/msg00295.html (9,808 bytes)

58. Re: [TowerTalk] Grounding connection to tower legs (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Thu, 12 Oct 2017 20:20:01 -0700
Ground to pipe connector: http://www.emerson.com/documents/automation/588898.pdf Data sheet says it's NEC/CEC compliant "for ordinary locations"... Don N7EF __________________________________________
/archives//html/Towertalk/2017-10/msg00140.html (10,048 bytes)

59. Re: [TowerTalk] mounting a dipole to the side of a tower (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Sun, 1 Apr 2018 05:19:56 -0700
We mounted a 30-meter full size dipole at 76' assembled from 204BA parts on the side of a Rohn25 tower with coaxial balun. It is spaced about a foot away from the nearest tower side rail, with a matc
/archives//html/Towertalk/2018-04/msg00000.html (11,609 bytes)

60. Re: [TowerTalk] Big Rak and HDX-555 (score: 1)
Author: Big Don <bigdon39@gmail.com>
Date: Sun, 26 Aug 2018 21:12:51 -0700
Actually, the *tower* you have this on can make a difference. Our 80 ft of Rohn25 makes a pretty slick torsion bar for absorbing rotational shocks that might otherwise cause slip at the clamp (or dam
/archives//html/Towertalk/2018-08/msg00237.html (15,957 bytes)


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