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Total 200 documents matching your query.

21. Topband: Easy and Effective 160 antenna (score: 1)
Author: Tim Duffy K3LR <k3lr@k3lr.com>
Date: Thu, 14 Dec 2006 22:50:08 -0600
For the ARRL 160 contest a few weekends ago, I needed a quick and easy way to get on TopBand from my Oklahoma QTH. I am in a very antenna restricted area and my back yard is only 50 ft deep. I purcha
/archives//html/Topband/2006-12/msg00161.html (8,093 bytes)

22. Re: Topband: 160m Mobile whips as a dipole, or a beam ? (score: 1)
Author: Tim Duffy K3LR <k3lr@k3lr.com>(by way of Bill Tippett<btippett@alum.mit.edu>)
Date: Thu, 28 Dec 2006 15:53:57 -0500
I use four of the Valor 160 meter mobile antennas with my DX Engineering RX 4 square. The results are amazing. I purchased them from AES in Cleveland (they were in stock). K8AZ just bought 4 of them
/archives//html/Topband/2006-12/msg00313.html (7,244 bytes)

23. Re: Topband: 160m Mobile whips as a dipole, or a beam ? (score: 1)
Author: Tim Duffy K3LR <k3lr@k3lr.com>
Date: Tue, 02 Jan 2007 10:13:07 -0600
I am no longer using the DXE active antennas. The active antennas worked fine, but in a multi multi with all of the RF from multiple bands, the active antennas were trouble (no way to put bandpass fi
/archives//html/Topband/2007-01/msg00035.html (8,297 bytes)

24. Topband: Great reference book about short verticals (score: 1)
Author: Tim Duffy K3LR <k3lr@k3lr.com>
Date: Tue, 02 Jan 2007 21:58:49 -0600
I've had numerous off reflector exchanges with many of you concerning my mobile antenna RX DXE 4 square. W8JI's web site is full of helpful ideas on reduced size antennas. My other favorite reference
/archives//html/Topband/2007-01/msg00051.html (7,342 bytes)

25. Topband: Best Height Above Ground for a Beverage RX Antenna (score: 1)
Author: Tim Duffy K3LR <k3lr@k3lr.com>
Date: Tue, 09 Jan 2007 22:29:22 -0600
I am curious if there are directional improvements to be gained with Beverage antennas with respect to height above ground? What changes at 6 ft, 8 ft or 10 ft? How important is it to have the height
/archives//html/Topband/2007-01/msg00177.html (7,203 bytes)

26. Re: Topband: Feeding a Cell Tower for 160? (score: 1)
Author: Tim Duffy K3LR <k3lr@k3lr.com>
Date: Wed, 31 Jan 2007 06:34:36 -0600
I thought using a cell tower was also a good idea. I used one in the late 80's during the ARRL 160 contest operating from Ohio. I used it to hang an inverted vee dipole with the center at 300 ft. Str
/archives//html/Topband/2007-01/msg00479.html (8,379 bytes)

27. Re: Topband: Good Antenna For Little Back Yard (score: 1)
Author: Tim Duffy K3LR <k3lr@k3lr.com>
Date: Sat, 11 Aug 2007 18:50:17 -0500
Hello Bill! I posted this to the reflector last December. It is a simple, easy and very effective antenna for 160 meters. Several operators have emailed me after building the antenna and they are hav
/archives//html/Topband/2007-08/msg00016.html (8,436 bytes)

28. Topband: Low dipole for receive (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Tue, 27 Nov 2007 23:12:01 -0600
I can confirm that a low &frac12; wavelength dipole is VERY effective on 160 and 80 meters. Mine are 20 feet high for both bands. Before Sunset and after Sunrise they are often the best RX antennas w
/archives//html/Topband/2007-11/msg00232.html (6,777 bytes)

29. Re: Topband: Antenna Noise canceller (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Tue, 18 Dec 2007 21:07:36 -0600
I have recently had great success with the DX Engineering Noise Canceling Controller (NCC-1). For years we used the MFJ 1025 which worked very well. I was able to more consistently peak signals (incr
/archives//html/Topband/2007-12/msg00139.html (7,573 bytes)

30. Re: [CQ-Contest] [TowerTalk] RG-6 connector issues/ rcv array (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Fri, 18 Jan 2008 20:49:03 -0600
Hello Bob! I installed a four square receiving system for 160 meters using the RG-6 cable, connectors, stripper and installation tool all purchased from DX Engineering. I installed a connector in les
/archives//html/Topband/2008-01/msg00145.html (10,032 bytes)

31. Re: Topband: Crossfire phasing (score: 1)
Author: "Tim Duffy K3LR" <K3LR@k3lr.com>
Date: Thu, 7 Aug 2008 21:07:56 -0500
Here is a timely paper on 4 square measurement techniques that was presented in Dayton a few months ago: http://www.kkn.net/dayton2008/W8WWV08.pdf 73! Tim K3LR _______________________________________
/archives//html/Topband/2008-08/msg00018.html (6,747 bytes)

32. Re: Topband: Noise cancellers performance (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Sat, 13 Sep 2008 09:15:33 -0500
I have used all four of these cancellers on 160 meters. The MFJ-1026, ANC-4, SEM and DXE NCC-1. The NCC-1 works the best for us, with the 1026 coming in second. I could never see any receiving improv
/archives//html/Topband/2008-09/msg00035.html (8,932 bytes)

33. Re: Topband: DX Engineering Receiver 4 Square using W8JI Passive Elements (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Sat, 26 Sep 2009 13:02:56 -0500
Dave is 100% correct. After seeing K1LT present a paper at Dayton 2008 where he used the W8JI short verticals in his 160 meter beam forming vertical array - I switched to them. Look at page 14 of his
/archives//html/Topband/2009-09/msg00130.html (10,160 bytes)

34. Re: Topband: 4SQ Question (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Sat, 5 Dec 2009 13:03:01 -0600
Hello Dave: I am using two four squares for 80 meters. They are spaced 5/8 wavelength apart (broadside to Europe). There is 3 dB additional gain with two 4 squares compared to one. They are each fed
/archives//html/Topband/2009-12/msg00064.html (7,865 bytes)

35. [TowerTalk] 2010 Antenna Forum in Dayton (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Mon, 3 May 2010 18:25:09 -0500
Friday, May 14, 2010 HARA Arena 2:30 p.m. - 5:00 p.m. Room 1 Moderator: Moderator: Tim Duffy, K3LR Speakers: "Is Your Antenna Properly Insured" Ray Fallen, ND8L "The 8 Vertical Receiving Array" Joel
/archives//html/Topband/2010-05/msg00003.html (7,208 bytes)

36. Re: Topband: 2010 Antenna Forum in Dayton (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Tue, 4 May 2010 09:08:08 -0500
Hello Sante! The PowerPoint presentations for the Antenna Forum since 2004 are available on the left side buttons at http://www.k3lr.com The 2010 Antenna forum papers will be posted on the same websi
/archives//html/Topband/2010-05/msg00014.html (8,856 bytes)

37. [TowerTalk] 2010 Dayton Antenna Forum papers are now online (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Sun, 23 May 2010 09:48:42 -0500
The four excellent papers that were presented last week during Hamvention are now online (Thanks to K5TR). The 2010 Dayton Antenna forum had standing room only attendance during many of the talks. Th
/archives//html/Topband/2010-05/msg00043.html (7,233 bytes)

38. Re: Topband: 3 element array (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Tue, 15 Jun 2010 09:13:00 -0500
Hello Rag, You might want to check out the 3 ele parasitic vertical Yagi in the last two editions of the ON4UN book. It is very easy to assemble, but does require an extensive ground system under eac
/archives//html/Topband/2010-06/msg00041.html (8,436 bytes)

39. Re: Topband: Height of Beverage-Driveway (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Thu, 7 Oct 2010 22:35:44 -0500
Hello Mike! I do exactly this - raise the Beverage from 7 feet to 13 feet - on my 1100 foot Beverage - when it goes over the drive way (about 15 feet long). There is no difference in performance vs.
/archives//html/Topband/2010-10/msg00033.html (9,065 bytes)

40. Re: Topband: 160 meter current-fed T antenna, where did I go wrong? (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Sun, 7 Nov 2010 09:25:37 -0600
Hello Mark, As soon as you add a few 120 ft radials on the ground, this antenna will starting working better. The more you add (to a point) will even help more. Don't worry if they can't be all the s
/archives//html/Topband/2010-11/msg00023.html (8,697 bytes)


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