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21. Topband: Condx Saturday night/Sunday morning (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Sun, 10 Mar 2002 15:42:21 -0800; I was going to take down the 160 vertical this weekend to rebuild it, figuring the "season" was over. I decided to put it on the air for one last night on Saturday. At 0130 I turned on the rig and he; /archives//html/Topband/2002-03/msg00089.html (7,635 bytes)
22. Topband: MFJ power line noise receiver or alternatives? (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Sun, 10 Mar 2002 16:26:26 -0800; I am wondering if anyone has used the MFJ power line noise receiver that came out last year. I don't own any VHF/UHF gear except 2m FM HT's (which are not useful for this, I understand). I need to ge; /archives//html/Topband/2002-03/msg00090.html (7,755 bytes)
23. Topband: MFJ power line noise receiver or alternatives? (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Wed, 13 Mar 2002 10:57:20 +0000; I noticed that HRO has a Yaesu scanner (VR-120) for $129 that covers .5 to 1300 MHz. Although more money than the other solutions, it appears to be the best because you can use any frequency you want; /archives//html/Topband/2002-03/msg00117.html (7,660 bytes)
24. Topband: Propagation Saturday night (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Sun, 10 Feb 2002 21:48:32 -0800; Saturday night propagation seemed to be outstanding. Many east coast stations called me on phone. Even several Florida stations (FL is normally tough even on CW from the west coast). On CW, I could h; /archives//html/Topband/2002-02/msg00039.html (6,768 bytes)
25. Topband: Re: Noise and reception (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Tue, 19 Feb 2002 11:30:56 +0000; I think what has been neglected in this discussion is the local noise environment. If you have a low noise QTH (such as Tom apprarently does), then it makes sense that vertical polarization is the wa; /archives//html/Topband/2002-02/msg00115.html (8,393 bytes)
26. Topband: Beverage grounds (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Mon, 25 Feb 2002 08:29:28 -0800; I have used both ground rods and radials and both seem to work about the same, although I haven't done a real A/B comparison. However, when I used radials, I typically would have 3 or 4 quarter-wave; /archives//html/Topband/2002-02/msg00208.html (8,782 bytes)
27. Topband: Sub-band for split operation mirroring the DX window? (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Tue, 26 Feb 2002 20:34:11 -0800; Just thinking out loud here, I wonder if it would make sense to have DX stations operate from 1830 to 1840 or whatever and listen exactly 100 kHz above their transmitting frequency (ie 1930 to 1940).; /archives//html/Topband/2002-02/msg00229.html (7,739 bytes)
28. Topband: bandplan (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Wed, 23 Jan 2002 08:20:13 -0800; This all sounds good, but it seems to me it just creates a VE phone band. Why should we expect VE's to honor a voluntary band plan on 160 when US stations won't? On all the other bands, VE's use the; /archives//html/Topband/2002-01/msg00175.html (7,568 bytes)
29. Topband: Shunt feed on a budget (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Mon, 28 Jan 2002 08:48:56 -0800; Arcing in the air insulated section isn't the only problem. Frequently, you will get arcing in the thin air gap between the dielectric and the metal plate. This gets worse for high permittivity diele; /archives//html/Topband/2002-01/msg00228.html (8,196 bytes)
30. Topband: Re: One way propogation or QRM? (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Tue, 29 Jan 2002 22:55:16 -0800; I stayed up until 2:30 AM local on Friday waiting for the ZL and VK sunset peak, which apparently never happened, even though on 75 meters, VK3DZM was booming in. I overslept and didn't get back on; /archives//html/Topband/2002-01/msg00256.html (9,840 bytes)
31. Topband: Beverage current distribution (score: 1): Author: richard@karlquist.com (Richard Karlquist (N6RK)); Date: Mon, 24 Sep 2001 08:01:18 -0700; Yesterday, I measured the current distribution on my 550 ft beverages. The near end/far end current ratio was 5 dB on 160m gradually increasing to 10 dB on 40m. It seems to me that, at 550 ft, I have; /archives//html/Topband/2001-09/msg00132.html (7,716 bytes)
32. Topband: RF resistance of wire (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Tue, 31 Jul 2001 20:44:57 -0700; W8JI: Not trying to argue with you, but a dumb question is: how come the braid isn't lossy when it is still part of the coax, but suddenly becomes lossy when freestanding? 73, Rick N6RK -- FAQ on WWW; /archives//html/Topband/2001-07/msg00000.html (7,339 bytes)
33. Topband: RE: Pacific 160n Contest strategy (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Mon, 9 Jul 2001 20:21:03 -0700; VK6VZ: Maybe someone can help me on strategy for this contest. The start time is midnight local time in California. When would the VK/ZL sunset peak occur? (hopefully during the contest!) My sunrise; /archives//html/Topband/2001-07/msg00013.html (7,639 bytes)
34. Topband: RF resistance of wire (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Mon, 30 Jul 2001 22:27:44 -0700; FWIW: I tested a 1000 foot run of open wire line made with STRANDED aluminum 4 AWG THHN wire. It was very low loss, a few tenths of a dB on 160 up to about a dB on 10 meters. I would say that the str; /archives//html/Topband/2001-07/msg00082.html (7,310 bytes)
35. Topband: mounting ladder line (score: 1): Author: richard@karlquist.com (richard@karlquist.com); Date: Tue, 29 May 2001 04:06:51 -0000; K2WH: I do this with my homebrew open wire line. I use a router to cut the slots. Photos on my web site: http://www.karlquist.com/Irrigation/irrigation.html scroll down and click on "open wire line".; /archives//html/Topband/2001-05/msg00086.html (7,622 bytes)
36. RE: Topband: Beverage measurements (score: 1): Author: "Richard Karlquist" <richard@karlquist.com>; Date: Sat, 13 Sep 2003 09:13:59 -0700; That's very interesting. I think you have now permanently debunked the sloping wire configuration, in case anyone still believed in it. It wasn't clear if you also eliminated the vertical drop from t; /archives//html/Topband/2003-09/msg00056.html (7,724 bytes)
37. RE: Topband: 160 Beacons (score: 1): Author: "Richard Karlquist" <richard@karlquist.com>; Date: Mon, 15 Sep 2003 19:54:39 -0700; What is the legality of a 160 meter beacon for FCC licensees? I searched on this a little and it seems that "unattended" ones are only allowed on 10 meters and up and then only in specific subbands.; /archives//html/Topband/2003-09/msg00063.html (8,100 bytes)
38. RE: Topband: 160 Beacons (score: 1): Author: "Richard Karlquist" <richard@karlquist.com>; Date: Sat, 20 Sep 2003 09:30:30 -0700; Another possibility is what I call "reverse beacons": Set up receivers in various locations to monitor 160 meters and connect them to the internet using a network such as Echolink or IRLP in receive; /archives//html/Topband/2003-09/msg00077.html (9,521 bytes)
39. RE: Topband: Receivers (score: 1): Author: "Richard Karlquist" <richard@karlquist.com>; Date: Wed, 8 Oct 2003 07:22:52 -0700; For minimum phase filters, it is true that a brick wall filter inevitably has extremely delay distortion, resulting in ringing. However, for non-minimum phase filters, there is no such delay constra; /archives//html/Topband/2003-10/msg00044.html (9,355 bytes)
40. Re: Topband: measuring transformer core inductance (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Fri, 14 Nov 2003 17:11:22 -0800 (PST); It's worse than that. If the transformer EVER had DC flowing in its lifetime, it can have permanently reduced permeability, because it has been partially magnetized, like the old magnetic core memory; /archives//html/Topband/2003-11/msg00111.html (8,541 bytes)

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