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Total 213 documents matching your query.

1. Re: [TowerTalk] 160m 1/4 Wave Vertical Results Thus Far... (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Fri, 28 Sep 2007 13:13:18 -0500
I agree with John W0UN. I think you are chasing a paper tiger. The resonant point should be the frequency where you have zero reactive component in the feedpoint Z. If you are not finding one, it is
/archives//html/Towertalk/2007-09/msg00820.html (9,369 bytes)

2. [TowerTalk] re Wooden poles (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Thu, 4 Oct 2007 11:55:35 -0500
I have not read the CQ article but a couple of things about wood poles give me pause (I've considered them in the past) assuming you can get one to your QTH and get a crew with a big auger to drill a
/archives//html/Towertalk/2007-10/msg00084.html (7,341 bytes)

3. Re: [TowerTalk] Inverted L for 160 Meters (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Mon, 15 Oct 2007 18:06:45 -0500
hi Tom, I have not read the QST article but I'll take a stab at ur questions since no one else has. * Do I understand correctly, that C1 in the diagram is a simple variable capacitor that ranges from
/archives//html/Towertalk/2007-10/msg00300.html (10,593 bytes)

4. [TowerTalk] Name this antenna (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Fri, 26 Oct 2007 08:56:27 -0500
You are thinking of the article "Everything Works" which was in QST in July 2000. Tom Schiller tells the story of a trip to Saipan to operate in a contest. They brought a 100 w. rig and started out w
/archives//html/Towertalk/2007-10/msg00716.html (8,197 bytes)

5. [TowerTalk] If Lightning Strikes Drop PlayStation and Pick Up a Book (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Sun, 28 Oct 2007 18:45:09 -0600
Page one middle column story in Saturday Wall St. Journal on lighting risks and the problem of high dollar insurance claims because consumer's exotic and expensive gadgets are getting fried by lightn
/archives//html/Towertalk/2007-10/msg00806.html (7,226 bytes)

6. Re: [TowerTalk] Rohn 25G Tower (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Tue, 13 Nov 2007 11:19:20 -0600
Look, if you want to put up a 40 foot unguyed tower, why don't you go buy a 40 foot FREE STANDING TOWER _______________________________________________ _______________________________________________
/archives//html/Towertalk/2007-11/msg00289.html (7,796 bytes)

7. Re: [TowerTalk] Rohn 25G Tower (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Tue, 13 Nov 2007 11:25:23 -0600
Look, if you want to put up a 40 foot unguyed tower, why don't you go out and get a 40 foot free standing tower, a tower that's _designed_ to be unguyed, and be done with it? They make towers that ar
/archives//html/Towertalk/2007-11/msg00290.html (8,100 bytes)

8. Re: [TowerTalk] grounding insulated tower (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Mon, 7 Jan 2008 12:27:30 -0600
Jim is right. go to images.google.com and enter something like: tower base insulator you will get a bunch of images of various professional and amateur towers, including a relatively modest AM tower
/archives//html/Towertalk/2008-01/msg00097.html (7,328 bytes)

9. [TowerTalk] KFI tower (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Mon, 17 Mar 2008 20:58:36 -0600
thanks dino for posting the link and covering the construction and putting the photos up on your website. it's not every day a new main tower for a 1-A goes up. I sure wish I could be there to ask th
/archives//html/Towertalk/2008-03/msg00318.html (6,719 bytes)

10. Re: [TowerTalk] LMR and CNT (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Tue, 25 Mar 2008 12:22:45 -0500
My advice--if you are considering going with LMR or CNT and the cost of a run of one of them, you may as well spend a bit more and go with 1/2 inch heliax LDF4-50 and get it over with. There's always
/archives//html/Towertalk/2008-03/msg00469.html (7,008 bytes)

11. Re: [TowerTalk] Highway light poles (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Thu, 17 Apr 2008 12:15:12 -0500
If you want one of those real tall expressway interchange light poles you should expect to have a highway dept.size budget. My guess that they are NOT cheap is based on a price check of flagpoles, wh
/archives//html/Towertalk/2008-04/msg00434.html (8,940 bytes)

12. Re: [TowerTalk] The Vertical and the Balun (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Thu, 15 May 2008 18:29:58 -0500
I also try to avoid using a balun (1:1 unun...whatever term you wish) as much as possible. They seem to be okay when they match up with the parameters of the system they are placed in and these don't
/archives//html/Towertalk/2008-05/msg00290.html (9,706 bytes)

13. [TowerTalk] antenna analyzers (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Mon, 2 Jun 2008 12:38:53 -0500
I've only used the MFJ 259 or isit 269? The one that covers 160 m. up through 70 cm with the analog SWR and R meters on the front panel. I use it constantly. I'll never forget the time I had just set
/archives//html/Towertalk/2008-06/msg00043.html (7,639 bytes)

14. Re: [TowerTalk] RF/antenna analyzers (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Mon, 2 Jun 2008 17:31:59 -0500
garbage. only goes down to 2 mhz : ) 73 rob / k5uj <<<<TTers, this is what you want: http://www.us.anritsu.com/products/ARO/North/Eng/showProd.aspx?ID=839&cat=1&;cat2=2&cat3=24&cat4=0 _______________
/archives//html/Towertalk/2008-06/msg00055.html (7,187 bytes)

15. Re: [TowerTalk] FIRST TOWER UP AND LOOKING GORGEOUS (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Sun, 8 Jun 2008 22:00:08 -0500
Congratulations on the new tower! They always look the best when they're yours! <<<How come you did not plan this ahead of time? 30 feet is a waste of money Hardy, which is it--did ur a/c break down
/archives//html/Towertalk/2008-06/msg00161.html (8,471 bytes)

16. Re: [TowerTalk] Vert. 1/2 wave dipole vs Hori. 1/2 wave dipole? (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Sat, 14 Jun 2008 23:24:04 -0500
<<<A 1/4 wave 80m vertical series fed on 40m is nothing else then a halve wave vertical on 40m which was questioned about.>>> No, the question had to do with one half wave length DIPOLEs, vertically
/archives//html/Towertalk/2008-06/msg00296.html (9,543 bytes)

17. Re: [TowerTalk] 1/2 wave vertical vs 1/2 wave horizontal dipole (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Sun, 15 Jun 2008 16:37:41 -0500
<<<The vertical dipole COULD be end-fed, against a radial screen.>>> Read <a href="http://en.wikipedia.org/wiki/Dipole_antenna">this</a> Now read <a href="http://en.wikipedia.org/wiki/Monopole_antenn
/archives//html/Towertalk/2008-06/msg00315.html (7,499 bytes)

18. Re: [TowerTalk] 1/2 wave vertical vs 1/2 wave horizontal dipole (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Mon, 16 Jun 2008 06:28:19 -0500
I apologize for my earlier message as I did not realize the reflector would screw up embedded hypertext links. Here it is again with just the http addresses: Dipole antenna: http://en.wikipedia.org/w
/archives//html/Towertalk/2008-06/msg00330.html (8,055 bytes)

19. Re: [TowerTalk] Delta Loop compared to Dipole (actual experience) (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Wed, 25 Jun 2008 11:27:27 -0500
No -- the delta loop is an equilateral triangle loop, called "delta" for the Greek capital letter Delta which is an equilateral triangle. The "skywire" loop (taken from the "Loop Skywire" QST article
/archives//html/Towertalk/2008-06/msg00542.html (9,937 bytes)

20. Re: [TowerTalk] Rohn 25 Insulated Base (score: 1)
Author: "Rob Atkinson" <ranchorobbo@gmail.com>
Date: Mon, 30 Jun 2008 11:45:57 -0500
The Rohn 25 single point insulator base is even rarer and harder to find than the free standing plate that someone was searching for a few days ago. The last time I saw one for sale new it was $1200.
/archives//html/Towertalk/2008-06/msg00702.html (8,152 bytes)


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