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Total 42 documents matching your query.

1. Re: Topband: Terrain - 160M Array (score: 1)
Author: Yuri Blanarovich <k3bu@optonline.net>
Date: Thu, 23 Mar 2006 11:41:24 -0500
Moxon's book would indicate that verticals on a slope are at a disadvantage as the ground reflection (gain) is in the wrong direction. You could possibly model the verticals over and extensive wire
/archives//html/Topband/2006-03/msg00168.html (7,824 bytes)

2. Re: Topband: QST Jun 06 RX Loop (score: 1)
Author: k3bu@optonline.net
Date: Sun, 14 May 2006 20:52:13 -0400
Tom is confusing Faraday shield with Electrostatic shield and whole reasoning that the grounded shield of small loop antenna is THE antenna is all wrong. Wire loops inside the electrostatic shield ar
/archives//html/Topband/2006-05/msg00023.html (9,916 bytes)

3. Re: Topband: QST Jun 06 RX Loop (score: 1)
Author: k3bu@optonline.net
Date: Mon, 15 May 2006 10:41:17 -0400
That is true (by carefull construction and paying attention to symmetry, deep nulls are achievable), but also in a case when you have local, within fractions of wavelength distance from RX antenna, a
/archives//html/Topband/2006-05/msg00029.html (9,594 bytes)

4. Re: Topband: Coil position (score: 1)
Author: k3bu@optonline.net
Date: Tue, 16 May 2006 11:09:38 -0400
Yes, there was a number of mobile antenna shootouts, when various configurations and ways of loading were tested and field strength measured. W5DXP had some tabulated results I believe on mobile refl
/archives//html/Topband/2006-05/msg00033.html (13,972 bytes)

5. Re: Topband: QST Jun 06 RX Loop (score: 1)
Author: k3bu@optonline.net
Date: Wed, 17 May 2006 19:30:20 -0400
YES Raoul, the shielded or coax loop is providing electrostatic field shielding from the near by interference by its virtue of capacitance of the shield to the ground. Shield is a shield and NOT an
/archives//html/Topband/2006-05/msg00039.html (11,985 bytes)

6. Re: [TowerTalk] Topband: mystery low band antenna between Chevroland Goujon, France (near St Emilion) (score: 1)
Author: k3bu@optonline.net
Date: Wed, 21 Jun 2006 23:20:42 -0400
Really low band antennas are either LF BC stations, few in EU as Long Wave band, or some submarine TX. Yuri Blanarovich, K3BU _______________________________________________ _________________________
/archives//html/Topband/2006-06/msg00033.html (7,684 bytes)

7. Re: Topband: A question of efficiency (score: 1)
Author: k3bu@optonline.net
Date: Wed, 19 Jul 2006 21:59:27 -0400
(A) Bringing the antenna to resonance with the loading section, and then matching to the line with the L-network? Or, (B) Matching the non-resonant antenna directly with the L-network, omitting the
/archives//html/Topband/2006-07/msg00030.html (7,887 bytes)

8. Re: Topband: Elevated Radials - W5UN's take (score: 1)
Author: k3bu@optonline.net
Date: Tue, 08 Aug 2006 13:16:33 -0400
radials per antenna, and these are 20 feet high and parallel to the ground. John, ON4UN, claims I now have a great dummy load on 160, hi. But its working for me. Soil conditions undoubtedly have some
/archives//html/Topband/2006-08/msg00052.html (9,134 bytes)

9. Topband: Tesla RC presentation at Boxboro. (score: 1)
Author: k3bu@optonline.net
Date: Wed, 23 Aug 2006 22:05:02 -0400
I will be giving presentation at the Boxboro Convention on Saturday August 26 at 12:00 p.m. Subject: Building Contest Super Station N2EE, NT1E Word about Nikola Tesla and Tesla Radioclub. New locatio
/archives//html/Topband/2006-08/msg00099.html (7,645 bytes)

10. Topband: Topbanders - N2EE tour and party (score: 1)
Author: k3bu@optonline.net
Date: Wed, 23 Aug 2006 22:29:56 -0400
Tesla RC N2EE/NT1E is hosting tour of its new home at 83 Bayview Ave., Bayville, NJ 08721 (near Toms River) on Sunday, August 27 at 2:00 p.m. especially for Topbanders with Yuri, K3BU and Wally, W8LR
/archives//html/Topband/2006-08/msg00100.html (7,126 bytes)

11. Re: Topband: Sharing radials?? (score: 1)
Author: k3bu@optonline.net
Date: Fri, 29 Sep 2006 03:56:22 +0000 (GMT)
I will second that! What it does, it places the "perfect ground" in particular direction, which helps efficiency by minimising ground loses and pulls the lobe down close to horizon and extends it (mo
/archives//html/Topband/2006-09/msg00140.html (8,742 bytes)

12. Re: Topband: BOG antenna-more info ? (score: 1)
Author: k3bu@optonline.net
Date: Thu, 09 Nov 2006 21:44:41 +0000 (GMT)
Run as much as you can on the perifery of your property. I did that, with "Dog Loop" antenna OG, originally intended as a invisible dog RF fence, but by the time I got it down, dog was smart and did
/archives//html/Topband/2006-11/msg00072.html (8,294 bytes)

13. Re: Topband: 33', 50',60' inverted "L" comparison assistance request (score: 1)
Author: k3bu@optonline.net
Date: Mon, 27 Nov 2006 14:37:19 +0000 (GMT)
I don't think you "waste radiation" with L top loading. You simply add horizontal component and polarization to your signal, which could be beneficial on transmit, if you want to cover near and far
/archives//html/Topband/2006-11/msg00173.html (9,333 bytes)

14. [CQ-Contest] Top Band Contest records updated. (score: 1)
Author: k3bu@optonline.net
Date: Fri, 08 Dec 2006 20:36:35 +0000 (GMT)
Top Band Contest records have been updated, including 2006 CQ WW 160 m Contest. Please check it out at http://members.aol.com/k3bu/160Records.htm Congratulations to all the new record setters! If the
/archives//html/Topband/2006-12/msg00098.html (6,848 bytes)

15. Re: Topband: Twin Lead (Speaker Wire) Loss? Wireless link?? (score: 1)
Author: k3bu@optonline.net
Date: Wed, 20 Dec 2006 18:48:20 +0000 (GMT)
center conductor is, I think, #26 wire. It has polyethylene insulation. It is available at Digikey.com. RG-178 or RG-179 are better (lighter, stronger) but run about $1 a foot. They are Teflon cable
/archives//html/Topband/2006-12/msg00204.html (7,988 bytes)

16. [CQ-Contest] Top Band Records updated WPX SSB 2006 (score: 1)
Author: k3bu@optonline.net
Date: Sun, 31 Dec 2006 20:47:38 +0000 (GMT)
Howdy TopBanders! Top Band records have been updated with recent CQ WPX SSB 2006 results. http://members.aol.com/k3bu/WPXRecords.htm Congrats to new record holders: LP N.America VE3MGY QRP World LY5A
/archives//html/Topband/2006-12/msg00368.html (6,925 bytes)

17. Re: Topband: beverage lobes (score: 1)
Author: k3bu@optonline.net
Date: Sun, 07 Jan 2007 05:17:55 +0000 (GMT)
Depends on the propagation and prevailing angles. Sometimes the higher angles work, sometimes low angles prevail and the long Beverages do wonders. Staggered Beverages narrow the horizontal lobe, to
/archives//html/Topband/2007-01/msg00085.html (7,326 bytes)

18. Re: Topband: Need advice (score: 1)
Author: k3bu@optonline.net
Date: Mon, 08 Jan 2007 03:10:09 +0000 (GMT)
Blank statement not valid and overturned by reality. Long wire, aka Beverage on the ground works, it has lower signal levels but it collects RF signals. Done it, have run stealth Beverage on the str
/archives//html/Topband/2007-01/msg00107.html (8,786 bytes)

19. Re: Topband: beverage lobes (score: 1)
Author: k3bu@optonline.net
Date: Mon, 08 Jan 2007 04:28:03 +0000 (GMT)
IS So! Using EZNEC file example of staggered Beverages from W8JI web site, they show 79.1 deg horizontal beamwidth at 35 deg elevation max angle, gain -14.9 dB F/B 15.6 dB Removing one Beverage, the
/archives//html/Topband/2007-01/msg00108.html (8,720 bytes)

20. Re: Topband: beverage lobes (score: 1)
Author: k3bu@optonline.net
Date: Tue, 09 Jan 2007 00:06:40 +0000 (GMT)
One has to realize the properties of the long Beverages, they lower the vertical angle and narrow the horizontal beamwidth. For example (according to EZNEC) going from 500 ft Beverage to 2000 ft, V
/archives//html/Topband/2007-01/msg00129.html (10,022 bytes)


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