Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 24 Mar 2010 22:54:22 -0500
Trim the longest dipole first. David HK1A EC5KXA _________________________________________________________________ Hotmail: Trusted email with powerful SPAM protection. https://signup.live.com/signup
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Mon, 5 Apr 2010 22:52:40 -0500
Yes, the vertical component of the guy wire tension becomes less as well of the compression force that is present at the legs of the tower. At the same time the horizontal component becomes greater,
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Fri, 9 Apr 2010 19:45:54 -0500
Jorge, Ojo con los pies cuadrados de antena que ponen en el tope de la torre, las diferentes configuraciones de Rohn. David HK1A EC5KXA ex-HK1KXA _____________________________________________________
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Sat, 10 Apr 2010 12:23:36 -0500
Is Alfa Radio still operative?Do they still sell the Alfa Spid rotator?Any hints, comments, experience on the subject? 73 David HK1A EC5KXA ex-HK1KXA _________________________________________________
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Sat, 10 Apr 2010 18:30:34 -0500
Thank you Don, I will be contacting MFJ next week. 73 David HK1A EC5KXA ex-HK1KXA _________________________________________________________________ Hotmail: Free, trusted and rich email service. http
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Sun, 11 Apr 2010 08:43:20 -0500
KP7UC wrote:"I dont understand what your design of the "enclosed angle ...is about 30-35 degrees ...for a correct apex angle.." means?"The legs of a Vee are long wires. Long wires antennas have the r
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Fri, 16 Apr 2010 09:10:42 -0500
There are several methods like drawing circles, with a radius twice the width of the tower, from the two other legs (2 and 3). The point, M, where the circles intersect in front of the first leg (1),
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Mon, 19 Apr 2010 00:16:42 -0500
Tell me if I am wrong: The trap should be for 30m band, 10,1 MHz, not for 7MHzFrom the bottom of the vertical to the bottom of the 30m trap is around 1/4WL at 10.1 Mhz. NOT AT 7 MHz.At 7 MHz the RF i
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 21 Apr 2010 19:42:33 -0500
We have been running HFTA for a 3 stack of 5 L for 28 MHz. The tower is on the side slope of a small hill. The tower base is about 15 meters above the relatively flat terrain in an azimuth of interes
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 21 Apr 2010 22:00:24 -0500
Thanks to everyone for their advice. Good I asked, otherwise I would have installed the antennas with too short separation, against my will and criteria, I knew something had to be wrong. David HK1A
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Sun, 25 Apr 2010 13:55:54 -0500
Me parece que tienes el cable coaxial acoplándose a la antena y al variar la longitud cambia la sintonía. Tienes un buen choke o balún? David HK1A EC5KXA ex-HK1KXA ___________________________________
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Mon, 26 Apr 2010 12:22:08 -0500
Maybe someone here has been offended with a mail written in spanish the reflector. My intention was to send it to the thread originator, but I forgot that the reflector's mail is the default recipien
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Fri, 7 May 2010 07:02:47 -0500
If I am not wrong in The Antenna Compendium vol. I or vol. II, there is a wide bandwidth dipole made with only two wires spaced about 6 feet for 160m, wires meet at the ends on each half of the anten
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 1 Sep 2010 11:15:05 -0500
I did two "L" out of an old coat hanger wire. About 6" for the handles and 30" for long part of the wire L. Take one on each hand as an inverted L , being the vertical part of the inverted L, the 6"
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 1 Sep 2010 18:33:58 -0500
Dave, Just try it, no kidding. 73 David HK1A EC5KXA ex-HK1KXA _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesti
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Mon, 22 Nov 2010 11:56:07 -0500
Not as elegant nor as good like the ones exposed before but this is a poor man's, or emergency, stack match. Needed: Two antenna selector switches with two antenna ports One antenna switch with three
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Fri, 19 Aug 2011 22:47:54 -0500
I would not trust Google-Earth elevation data.To add an example like Bimini, Bahamas: Check Malpelo Island, HK0TU, 400 km away from the colombian Pacific coast (4.0 N, 81.6 W) According to Google ear
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Sun, 18 Sep 2011 20:44:42 -0500
My knowledge on this relies on W2PV's "Yagi Antenna Design" book:The elements may, or not, be electrically connected to the boom by, i.e., U "muffler clamps". If the metallic clamp system separates t
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 20 Feb 2013 20:29:30 -0500
Interesting. Is the take off angle the same for all three grounds when simulated at certain height? David HK1A EC5KXA AE5XQ _______________________________________________ ___________________________
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 3 Apr 2013 23:26:39 -0500
Any hint on the values of conductivity and relative dielectric constant of a reinforced concrete rooftop? David HK1A EC5KXA AE5XQ _______________________________________________ _____________________