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Total 19 documents matching your query.

1. Re: [TowerTalk] Guy Rope Knot (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Wed, 31 Oct 2012 12:36:45 +0200
I have used Bowline on both ends of the rope guy wires for my rotating towers including the new 70 meters tower with ca 0.4 inch ropes. So far so good. Now reading abit on those knots mentioned in th
/archives//html/Towertalk/2012-10/msg00421.html (10,609 bytes)

2. Re: [TowerTalk] 15m monster finally up - EME and Video (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Tue, 5 Feb 2013 15:49:24 +0200
Hi, After two fruitless attempts at moonrise I got EME QSO with myself done during moonset. Here is the video of the best minute out of ca 10 minute period the signals were audible with strong QSB on
/archives//html/Towertalk/2013-02/msg00082.html (12,568 bytes)

3. Re: [TowerTalk] 15m monster finally up - EME and Video (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Wed, 6 Feb 2013 16:56:37 +0200
Thanks Tim, I got a good program suggestion - MoonSked by GM4JJJ. Not being very familiar with this stuff yet I can calculate windows for us. Basically I am looking for moments when the moon is from
/archives//html/Towertalk/2013-02/msg00103.html (11,236 bytes)

4. Re: [TowerTalk] Fwd: 15m monster finally up - EME and Video (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Wed, 6 Feb 2013 17:01:07 +0200
There was no noticable shift. I guess that is the case on HF. 73 tonno How much was the frequency shift due to the moon's movement? Hans - N2JFS Hi, After two fruitless attempts at moonrise I got EME
/archives//html/Towertalk/2013-02/msg00104.html (17,124 bytes)

5. [TowerTalk] 21 EME trial tonight (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Fri, 15 Mar 2013 22:52:08 +0200
I will try to do EME tonight 20-21z on 21060 and perhaps will try EME QSO with RU1A. Anyhow, anyone is welcome to listen to 21060 at this time and see if can copy anything... and if so can try to ans
/archives//html/Towertalk/2013-03/msg00177.html (7,083 bytes)

6. Re: [TowerTalk] 21 EME trial tonight (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Thu, 28 Mar 2013 05:32:46 +0200
Hi, the previous effort was hopeless as the band was wide open at the time. Anyhow, we have arranged a sked now with Paul, WA6PY tomorrow morning, Thurday March 28th, 03:20z on 21070. I will start to
/archives//html/Towertalk/2013-03/msg00395.html (8,613 bytes)

7. Re: [TowerTalk] 21 EME trial tonight - new frequency 21.090 (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Thu, 28 Mar 2013 07:45:22 +0200
Sorry, but we changed frequency to 21.090. So anyone, listen to 21.090. Es5tv Hi, the previous effort was hopeless as the band was wide open at the time. Anyhow, we have arranged a sked now with Paul
/archives//html/Towertalk/2013-03/msg00399.html (9,478 bytes)

8. Re: [TowerTalk] 21 EME trial tonight - new frequency 21.090 (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Wed, 27 Mar 2013 22:33:50 +0200
CW What mode? What are you going to be transmitting? 73 Jim W7RY Sorry, but we changed frequency to 21.090. So anyone, listen to 21.090. Es5tv --Original Message-- From: Tõnno Vähk [mailto:tonno.vahk
/archives//html/Towertalk/2013-03/msg00404.html (11,090 bytes)

9. Re: [TowerTalk] 21 EME trial tonight - new frequency 21.090 (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Sat, 30 Mar 2013 14:16:11 +0200
Hi, we did not manage to make QSO although I heard my signals pretty well actually. Paul heard me in a few bursts but I had no copy on him. I thought someone else might have heard my signals but no s
/archives//html/Towertalk/2013-03/msg00473.html (14,762 bytes)

10. [TowerTalk] Greenstone vacuum relays (score: 1)
Author: Tõnno Vähk <tonno.vahk@gmail.com>
Date: Fri, 26 Apr 2013 13:40:16 +0300
Does anyone have experience with products by Greenstone, especially the vacuum relays: http://www.greenstoneusa.com/vacuumrelays.htm They are supposedly made in China and cost several time less than
/archives//html/Towertalk/2013-04/msg00326.html (8,976 bytes)

11. Re: [TowerTalk] 4 square for 80 (score: 1)
Author: "Tonno Vahk" <tonno.vahk@gmail.com>
Date: Fri, 23 Sep 2016 12:43:02 +0300
Elevated radials work very well with 4 square elements if you leave the ground loss question separate. I have 1 elevated radial per each vertical (ca 6-8 feet high) for my full size 80m 4Square and i
/archives//html/Towertalk/2016-09/msg00349.html (13,792 bytes)

12. Re: [TowerTalk] Turnbuckles with Rod Sides (score: 1)
Author: "Tonno Vahk" <tonno.vahk@gmail.com>
Date: Tue, 12 Sep 2017 14:55:50 +0300
Oh, hold on guys!:) The 15m array is still up and running! Good way to get those rumors going:) I did lose another 45m rotating tower 2-3 years ago though due to the turnbuckle failure. The tower wen
/archives//html/Towertalk/2017-09/msg00083.html (17,530 bytes)

13. Re: [TowerTalk] Turnbuckles with Rod Sides (score: 1)
Author: "Tonno Vahk" <tonno.vahk@gmail.com>
Date: Wed, 13 Sep 2017 11:11:35 +0300
Wow, than you for this great summary on the subject and research Grant! It sure makes all the sense that clips too far apart will be less effective due to the possible slack. Though not saddling the
/archives//html/Towertalk/2017-09/msg00100.html (12,462 bytes)

14. Re: [TowerTalk] Turnbuckles with Rod Sides (score: 1)
Author: "Tonno Vahk" <tonno.vahk@gmail.com>
Date: Wed, 13 Sep 2017 11:30:28 +0300
I have to say that the results and the performance of the array has even succeeded the expectations. It was due to that antenna that we managed to take all the CQWW and CQWPX EU MM records as ES9C in
/archives//html/Towertalk/2017-09/msg00101.html (10,814 bytes)

15. [TowerTalk] Advise needed on phased beverages (score: 1)
Author: Tonno Vahk <tonno.vahk@gmail.com>
Date: Tue, 11 Sep 2018 15:00:46 +0300
Hi, Last weekend I finally got into experimenting with phased beverages, something I was planning for some time. I installed 3 broadside 219m (718ft) long beverages into the forest looking at 90 degr
/archives//html/Towertalk/2018-09/msg00015.html (9,523 bytes)

16. Re: [TowerTalk] Advise needed on phased beverages (score: 1)
Author: Tonno Vahk <tonno.vahk@gmail.com>
Date: Tue, 11 Sep 2018 16:19:05 +0300
Jim, yes, I suspected they might interact of course. But can I avoid it? ungrounding both ends of the unused beverage would also not eliminate coupling I am afraid? Height is ca 2m +/- 0.5m. I did no
/archives//html/Towertalk/2018-09/msg00018.html (11,373 bytes)

17. Re: [TowerTalk] Advise needed on phased beverages (score: 1)
Author: Tonno Vahk <tonno.vahk@gmail.com>
Date: Wed, 12 Sep 2018 13:21:43 +0300
Jim, I ran the models of 2 beverages (any combination of the 2) with and without the 3rd passive wire present. And interestingly the models show almost no effect for the 3rd wire. Sort of makes sense
/archives//html/Towertalk/2018-09/msg00030.html (14,106 bytes)

18. [TowerTalk] How to calculate aluminium transmission line impedance? (score: 1)
Author: Tonno Vahk <tonno.vahk@gmail.com>
Date: Mon, 10 Oct 2022 05:17:12 +0300
Hi, I have EZNEC model of a tribander with one feedpoint where 10-15-20m elements are joined with a transmission line of 20mm x 20mm aluminium profiles, the gap between the profiles is 15mm. For the
/archives//html/Towertalk/2022-10/msg00060.html (9,373 bytes)

19. Re: [TowerTalk] How to calculate aluminium transmission line impedance? (score: 1)
Author: Tonno Vahk <tonno.vahk@gmail.com>
Date: Tue, 11 Oct 2022 19:26:50 +0200
Thanks to everyone who answered and particularly to Rick as this was the calculator I was looking for. It is surprising to see that the transmission line calculator in EZNEC which uses round wires gi
/archives//html/Towertalk/2022-10/msg00078.html (10,455 bytes)


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