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Total 223 documents matching your query.

41. Re: [TowerTalk] Fwd: Insulated elements, Yes - No? (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Tue, 5 Aug 2014 13:42:18 -0500
Dan/Hans, I cannot imagine building another antenna with parasitic elements mounted to an aluminum plate with the elements electrically connected to the boom and haven't made one that was connected i
/archives//html/Towertalk/2014-08/msg00130.html (13,306 bytes)

42. Re: [TowerTalk] TowerTalk] freight cost of tower part (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Fri, 15 Aug 2014 08:15:47 -0500
Here is the scoop on freight rates. They have published list prices, and then they have contracts with companies that include discounts - up to about 90% off those rates. Even when I owned a small co
/archives//html/Towertalk/2014-08/msg00301.html (8,751 bytes)

43. [TowerTalk] 2 Element Triband Quad (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Tue, 19 Aug 2014 22:41:39 -0500
If anyone has an EZNEC file for a two element Triband Quad (20/15/10) I would appreciate it if you could share it with me. I will play with the boom length, wire gauge, etc and optimize it for my pur
/archives//html/Towertalk/2014-08/msg00337.html (6,767 bytes)

44. Re: [TowerTalk] [Bulk] Re: tower insulators (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Mon, 1 Sep 2014 10:35:09 -0500
I have four 60 foot 25G towers that have a solid rod of fiberglass in each leg. These towers were in guyed for several years in a pretty harsh environment on top of a mountain. After having grade. 8
/archives//html/Towertalk/2014-09/msg00010.html (13,656 bytes)

45. Re: [TowerTalk] [Bulk] Re: tower insulators (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Mon, 1 Sep 2014 23:46:42 -0500
Gordon, No, sorry for misunderstanding. Here is what I said regarding the 3/8 rod... "After seeing the towers bend in about a. 60 mph wind, I used 3/8 fiberglass rod to guy them to small, homemade an
/archives//html/Towertalk/2014-09/msg00042.html (17,644 bytes)

46. Re: [TowerTalk] [Bulk] Re: tower insulators (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Tue, 2 Sep 2014 20:26:52 -0500
John, I have no idea. What I do know is there is not a lot of wind load on a 60 foot tower with no antennas on it and that it would take a tremendous amount of force to break a single four inch long
/archives//html/Towertalk/2014-09/msg00048.html (10,922 bytes)

47. Re: [TowerTalk] Joining Boom Tubing (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Mon, 15 Sep 2014 05:53:12 -0500
You can buy 2.75 OD x .120 wall tubing from DX Engineering. The inside diameter will be 2.510 giving you ten thousandths clearance to over sleeve the joints. http://www.dxengineering.com/parts/dxe-at
/archives//html/Towertalk/2014-09/msg00184.html (12,281 bytes)

48. Re: [TowerTalk] Is A Tower Weaker in Some Directions? (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Sun, 5 Oct 2014 17:19:56 -0500
I would say if you have to guess which way a strong wind will blow and try to figure out whether a tower will be stronger in one orientation versus another in order to sleep better the plan is margin
/archives//html/Towertalk/2014-10/msg00031.html (16,482 bytes)

49. Re: [TowerTalk] Guyed + self supporting /2 ?? (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Thu, 16 Oct 2014 06:30:39 -0500
These discussions are interesting but the bottom line appears to be Paralysis from Analysis in many cases. Everything you do is a risk. Use a little common sense and do something! About a decade ago
/archives//html/Towertalk/2014-10/msg00174.html (12,045 bytes)

50. Re: [TowerTalk] 100ft mobile on 160 (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Wed, 29 Oct 2014 19:32:10 -0500
John, Before deciding it isn't going to work and doing something different, I would try it first with some top loading wires and a shunt feed. I would highly recommend not using it as a support for a
/archives//html/Towertalk/2014-10/msg00433.html (8,817 bytes)

51. Re: [TowerTalk] Terminate braid at top of tower...or (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Tue, 4 Nov 2014 06:56:22 -0600
I also have trouble contemplating having a big wad of heavy cores hanging from the driven element of a large Yagi where the driven element may be 30 feet or more from the mast. Reading K9YC material
/archives//html/Towertalk/2014-11/msg00034.html (8,593 bytes)

52. [TowerTalk] Mast calculation (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Sun, 16 Nov 2014 07:33:23 -0600
Wondering if any mechanical engineers out there could calculate this: If you had 60 feet of 2 inch OD x .125 wall 6061-T6 (held solid at one end) how much rotational torque (foot pounds?) at the othe
/archives//html/Towertalk/2014-11/msg00234.html (7,390 bytes)

53. Re: [TowerTalk] [Bulk] Mast calculation (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Sun, 16 Nov 2014 12:06:08 -0600
Thanks to Jim Lux (call?), K5GW, and KZ1W for responses to my question. I may rethink the way I accomplish what I want to do. Jim - can you tell me the input parameters you used in that calculator an
/archives//html/Towertalk/2014-11/msg00241.html (7,219 bytes)

54. Re: [TowerTalk] Dipole gain? (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Thu, 11 Dec 2014 04:30:20 -0600
If every antenna were compared to every other antenna in terms of free space gain and all in the same unit of measure (say dBI) and if the numbers for gain F/B, F/R, etc were shown as average across
/archives//html/Towertalk/2014-12/msg00108.html (10,286 bytes)

55. Re: [TowerTalk] Dipole gain? (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Thu, 11 Dec 2014 05:35:35 -0600
I'm talking about 350 numbers averaged, for example covering the 20 meter band - not averaging two numbers like 10 and 20 dB and I'm suggesting that because an antenna can have in excess of 60 dB of
/archives//html/Towertalk/2014-12/msg00110.html (10,708 bytes)

56. Re: [TowerTalk] Dipole gain? (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Thu, 11 Dec 2014 10:44:02 -0600
Steve, In your unlikely example it would be 15 dB. I think it would not be possible to design an antenna such that the F/R changed by 10 dB in one KHz on the HF bands. I certainly would not want to s
/archives//html/Towertalk/2014-12/msg00120.html (13,776 bytes)

57. Re: [TowerTalk] : Nube rebar question (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Wed, 17 Dec 2014 19:09:14 -0600
I admire someone who has the most for the least expenditure. There are a few who have unlimited budgets and can afford store bought everything. There are many more who try to make the most with a li
/archives//html/Towertalk/2014-12/msg00267.html (10,233 bytes)

58. Re: [TowerTalk] Rohn 45 to Rohn 25 adapter (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Wed, 28 Jan 2015 08:16:22 -0500
Herb, Assuming the tower is guyed, seems to me the easiest thing to do would be to use a short flat top section on the 45G and a flat base plate for the 25G and just bolt them together with a few bol
/archives//html/Towertalk/2015-01/msg00465.html (8,277 bytes)

59. Re: [TowerTalk] Beverage Antenna (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Sat, 31 Jan 2015 12:41:37 -0600
Another alternative: Drill about a 5/16 inch through hole in the PVC about 1/2 to 1 inch down from the end and then cut a slot about the width of the wire diameter between the top of the holes and th
/archives//html/Towertalk/2015-01/msg00584.html (9,644 bytes)

60. Re: [TowerTalk] Beverage Antenna (score: 1)
Author: Stan Stockton <wa5rtg@gmail.com>
Date: Mon, 2 Feb 2015 05:23:57 -0600
Doug, Thanks for the contact in 160m Contest. I was ZF2DX that weekend. .05 = 1/20 but VE7RF, for some reason, calculated a half wavelength instead of a wavelength and then divided by 10 instead of 2
/archives//html/Towertalk/2015-02/msg00031.html (9,438 bytes)


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