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21. Topband: Take-off angle (score: 1): Author: W4EF@dellroy.com (Mike); Date: Wed, 01 May 2002 11:50:43 +0100; Ford, Adding radials in the near field of your vertical won't lower your angle of radiation. Rather it will improve efficiency which will increase your field strength in every direction in proportion; /archives//html/Topband/2002-05/msg00002.html (7,246 bytes)
22. Topband: Radiation Power Levels (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Wed, 22 May 2002 10:50:38 +0100; Hi Jon, Although the field strength in close proximity to your 160 meter TX antenna will be quite high, your body is fortunately a very inefficient transducer for 1.8 MHz energy. According to the ARR; /archives//html/Topband/2002-05/msg00152.html (7,555 bytes)
23. Topband: Noisy dimmer switches and RFI (score: 1): Author: W4EF@dellroy.com (Mike); Date: Fri, 08 Mar 2002 15:40:55 +0000; I had good luck with a Lutron TG-600PH until I installed dimmable compact flourescents bulbs. Now that same dimmer that was very quiet with an incandescent load is very noisy on MW/160/80 using the d; /archives//html/Topband/2002-03/msg00074.html (7,287 bytes)
24. Topband: XR0X on 160 (score: 1): Author: W4EF@dellroy.com (Mike); Date: Wed, 20 Mar 2002 14:26:46 +0000; Hi Brad, If you haven't done so already, you might try one of the MFJ or Timewave noise cancellors as a stop gap until you get the problem fixed with the power company. If you have a single noise sou; /archives//html/Topband/2002-03/msg00188.html (7,616 bytes)
25. Topband: XR0X on 160 (score: 1): Author: W4EF@dellroy.com (Mike); Date: Wed, 20 Mar 2002 19:57:31 +0000; I dunno if I buy those arguments. I would tend to think that even if the powerlines are reradiating energy from a single discharge point, the vector sum at your receiver should still looks like a sin; /archives//html/Topband/2002-03/msg00193.html (7,935 bytes)
26. Topband: Power Line Networking Article (score: 1): Author: W4EF@dellroy.com (Mike); Date: Thu, 7 Feb 2002 21:56:18 -0800; There is a good article in the February 2002 issue of Scientific American discussing the emergence of power line networking technology. It seems that the news isn't all bad. The article mentions that; /archives//html/Topband/2002-02/msg00024.html (7,412 bytes)
27. Topband: Let's try stuff (score: 1): Author: W4EF@dellroy.com (Mike); Date: Sun, 17 Feb 2002 05:39:35 -0800; I have that issue here somewhere, Tom. It was interesting (and not too surprising) to note the PY station's observation that signal strengths improved significantly when he connected conventional rad; /archives//html/Topband/2002-02/msg00102.html (10,999 bytes)
28. Topband: Noise and reception (score: 1): Author: W4EF@dellroy.com (Mike); Date: Sun, 17 Feb 2002 18:25:03 -0800; Tom, Are you suggesting that signals arriving from the ionosphere at moderate to low elevation angles are predominatly vertically polarized? I was always led to believe that they were basically rand; /archives//html/Topband/2002-02/msg00107.html (9,185 bytes)
29. Topband: FT-1000MP Key Clicks (score: 1): Author: W4EF@dellroy.com (Mike); Date: Fri, 18 Jan 2002 22:10:23 +0000; I think it would be helpful if QST started putting key click data in their product test reports. I think this has been suggested to them already by W8JI, et al. Also, I recall some articles appearing; /archives//html/Topband/2002-01/msg00138.html (7,792 bytes)
30. Topband: ewe (score: 1): Author: W4EF@dellroy.com (Mike); Date: Sat, 26 Jan 2002 15:33:31 -0800; Another alternative to the WF-1 is to use a couple of RF chokes and blocking capacitors (one pair in the shack and one pair at the antenna) to shove the audio back up feeder coax to a pair of headpho; /archives//html/Topband/2002-01/msg00207.html (9,265 bytes)
31. Topband: 160 One Way Propagation (score: 1): Author: W4EF@dellroy.com (Mike); Date: Tue, 29 Jan 2002 23:28:38 -0800; Having a relatively small TX antenna (30' high marconi on a city lot), I have learned to be persistent with stations who I know have directional receive antennas. Usually after 3 or 4 calls they get; /archives//html/Topband/2002-01/msg00257.html (9,064 bytes)
32. Topband: 160M EU Opening 20 Dec 01 (score: 1): Author: W4EF@dellroy.com (Mike); Date: Thu, 20 Dec 2001 20:33:57 +0000; Hi Paul, I don't know if it means anything, but take a look at the Auroral Oval plots from the NOAA POES satellite during the opening last night: http://www.sel.noaa.gov/pmap/Plots.html Its interesti; /archives//html/Topband/2001-12/msg00079.html (6,840 bytes)
33. Topband: Technical Papers of Interest to Topbanders (score: 1): Author: W4EF@dellroy.com (Mike); Date: Fri, 21 Dec 2001 20:30:44 -0800; Hi All, The September 2001 issue of the IEEE Transasctions on Broadcasting (Volume 47 - #3) contains several antenna papers which may be of interest to Topbanders: "A Method to Determine the Detuning; /archives//html/Topband/2001-12/msg00087.html (6,920 bytes)
34. Topband: Delta Loop (score: 1): Author: W4EF@dellroy.com (Mike); Date: Sun, 11 Nov 2001 15:55:35 +0000; I have heard these arguments before about delta loops on the low bands (one of my DXing buddies at work keeps telling me the same thing about our 75M delta loop), but aren't we forgetting that you do; /archives//html/Topband/2001-11/msg00041.html (7,790 bytes)
35. Topband: Internet access via power lines reborn in Europe (score: 1): Author: W4EF@dellroy.com (Mike); Date: Sun, 02 Sep 2001 00:44:21 +0100; There is a similar system being developed in the United States called Home Plug. I hope they are right about the interference, but I am very skeptical. I suspect that the power line advocates idea of; /archives//html/Topband/2001-09/msg00004.html (8,680 bytes)
36. Topband: Lightning Protection (score: 1): Author: W4EF@dellroy.com (Mike); Date: Wed, 19 Sep 2001 13:05:34 +0100; The pointed static dischargers mentioned in this discussion are used on almost every commercial and military aircraft in the world (take a look next time you go to an air show). The explanation that; /archives//html/Topband/2001-09/msg00106.html (7,877 bytes)
37. Topband: Collins 75A4 (score: 1): Author: Mike" <W4EF@dellroy.com (Mike); Date: Thu, 16 Aug 2001 06:51:14 -0700; I just picked up a Collins 75A4 from a local ham. Is there any receiver performance test data on this rig (two-tone IMD, BDR, sensitivity, etc)? I have always heard good things about this Rx, but the; /archives//html/Topband/2001-08/msg00062.html (7,134 bytes)
38. Topband: Ladderline (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Wed, 13 Jun 2001 14:23:02 -0700; NX4D: To get around this problem, get two pieces of low loss coax, place them side by side and bond the shields together at each end. At each end each of the parallel coax line, the parallel center c; /archives//html/Topband/2001-06/msg00028.html (8,643 bytes)
39. Topband: FT-1000D Noise Figure (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Thu, 1 Mar 2001 18:06:54 -0800; Does anyone know the typical noise figure of the FT-1000D on 160 meters when it in the high gain (versus AIP position)? Mike, W4EF.................. -- FAQ on WWW: http://www.contesting.com/FAQ/topba; /archives//html/Topband/2001-03/msg00006.html (7,088 bytes)
40. Topband: FT-1000D Noise Figure (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Mon, 5 Mar 2001 02:30:53 -0800; Well, nobody answered my email, so I looked up the MDS (minimum discernable signal) specs from the test reports on the ARRL website. I am not sure of the proper convention for determining MDS, so I a; /archives//html/Topband/2001-03/msg00042.html (7,843 bytes)

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