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1. Topband: Skewed Propagation Paths (score: 1): Author: kn4lf@tampabay.rr.com (Thomas Giella KN4LF); Date: Thu, 16 Jan 2003 08:16:28 -0500; Basically the simplest way to look at medium frequency signal propagation path skewing is that the transmitted RF signal will "always" seek to propagate along the path with least absorption, which al; /archives//html/Topband/2003-01/msg00089.html (7,799 bytes)
2. Topband: Topband Skewed Propagation (score: 1): Author: kn4lf@tampabay.rr.com (Thomas Giella KN4LF); Date: Thu, 16 Jan 2003 21:56:10 -0500; .....Basically the simplest way to look at medium frequency signal propagation path skewing is that the transmitted RF signal will "always" seek to propagate along the path with least absorption.....; /archives//html/Topband/2003-01/msg00101.html (8,013 bytes)
3. Topband: Topband Skewed Propagation (score: 1): Author: kn4lf@tampabay.rr.com (Thomas Giella KN4LF); Date: Fri, 17 Jan 2003 10:31:42 -0500; The whole concept of skewed propagation via this current thread that we are discussing is just a matter of semantics. Also I appreciate Bill W4ZV allowing me the time to explain the theory on this re; /archives//html/Topband/2003-01/msg00109.html (10,439 bytes)
4. Topband: SR/SS Greyline Research (score: 1): Author: kn4lf@tampabay.rr.com (Thomas Giella KN4LF); Date: Fri, 17 Jan 2003 11:36:14 -0500; I am a member of the Propagation Studies Committee of the RSGB. Within the organization their is very useful research currently being conducted on sunnrise/sunset greyline propagation enhancement. Th; /archives//html/Topband/2003-01/msg00113.html (7,206 bytes)
5. Topband: 160 Meter Propagation & Weather (score: 1): Author: kn4lf@tampabay.rr.com (Thomas Giella, KN4LF); Date: Fri, 01 Nov 2002 10:55:27 -0500; ...Professional scientific study of this effect has been conducted by E.S. Kazimirovsky and V.D. Kokourov of the Solar Terrestrial Physics Institute at Irkutsk, Russia http://iszf.irk.ru/ Their exten; /archives//html/Topband/2002-11/msg00009.html (7,841 bytes)
6. Topband: 160 Meter Propagation Indices (score: 1): Author: kn4lf@tampabay.rr.com (Thomas Giella, KN4LF); Date: Sun, 03 Nov 2002 15:27:46 -0500; Hello Fellow Radio Friends, Due to the dismal Topband propagation conditions seen during the CQ WW contest last weekend, I've received numerous requests for and explanation of 160 meter propagation c; /archives//html/Topband/2002-11/msg00020.html (7,817 bytes)
7. Topband: Large TSTM areas as MF "wall" (score: 1): Author: kn4lf@tampabay.rr.com (Thomas Giella, KN4LF); Date: Mon, 28 Oct 2002 06:22:36 -0500; Mac PY2CW Asked: Questions: A large thunderstorm area in the dx path is a factor for weaker sigs? Charged clouds "blocks" ground wave ? What is the mechanism ? Thomas KN4LF Says: As a retired Meteoro; /archives//html/Topband/2002-10/msg00147.html (7,741 bytes)
8. Topband: 160 Propagation & Weather (score: 1): Author: kn4lf@tampabay.rr.com (Thomas Giella, KN4LF); Date: Tue, 29 Oct 2002 13:24:00 -0500; Thomas KN4LF Says: Joe Dube KK4TR of Brooksville, FL and I have conducted subjective observations of this effect via 160 and 120 meters and the MF broadcast band for the past 4 winters. Subjective ob; /archives//html/Topband/2002-10/msg00158.html (7,761 bytes)
9. Topband: Paying For Topband E-List (score: 1): Author: kn4lf@tampabay.rr.com (Thomas Giella, KN4LF); Date: Wed, 14 Aug 2002 11:50:00 -0400; We have all grown accustomed to the "free" Internet and it's a hard thing to give up. Also because we invest so much in our station equipment and organization memberships like the ARRL, etc. and publ; /archives//html/Topband/2002-08/msg00034.html (6,834 bytes)
10. Topband: QRP DX (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Sat, 29 Jun 2002 10:33:51 +0100; Riccardo Asked: I would appreciate very much if QRP operators would share their experience about typical DX activity on 160 at QRP level (DXCC, WAC, Europe-US contacts, contest placement, etc.). Thom; /archives//html/Topband/2002-06/msg00063.html (7,822 bytes)
11. Topband: Takeoff Angle (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Wed, 01 May 2002 22:01:58 +0100; Thomas KN4LF Says: I would not expect to see close in one way propagation on 160 as mentioned above but takeoff angle is very important for close in ragchewing versus DXing. Here in Florida a group m; /archives//html/Topband/2002-05/msg00006.html (7,828 bytes)
12. Topband: Topband PWR Coupling Ant's (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Fri, 03 May 2002 13:33:01 +0100; Just a personal observation, on early Wednesday morning the 24th here in Plant City in Central Florida K1B was 599 on my low dipole up at 80 feet and nonexistent on my 80 foot tee! Joe KK4TR in Brook; /archives//html/Topband/2002-05/msg00021.html (6,681 bytes)
13. Topband: 136 KC VS 160 (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Sat, 11 May 2002 02:08:57 +0100; Boy if you think 160 meter propagation is complicated, wait until you experience 136 kc propagation. You get refraction off of the D layer at day. 160 will always be THE TOPBAND. 73, T. F. Giella, KN; /archives//html/Topband/2002-05/msg00106.html (6,463 bytes)
14. Topband: Lightning QRN (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Sun, 12 May 2002 23:24:55 +0100; Thomas KN4LF Said: That's basically correct. Actually a lightning bolt is comprised of on the average 3 discharges, to as many as 20. That's what the flickering is that our eyes see and it all happen; /archives//html/Topband/2002-05/msg00112.html (7,296 bytes)
15. Topband: 3/8 Wave L (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Fri, 17 May 2002 18:23:05 +0100; It's a common misconception that all 3/8 wave L antennas automatically radiate a majority of it's radiation at a high angle. Actually it all boils down to it's set up configuration. I've successfully; /archives//html/Topband/2002-05/msg00129.html (6,386 bytes)
16. Topband: Low Power 160 DXCC (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Tue, 28 May 2002 02:22:33 +0100; Thomas KN4LF Says: It obviously takes longer but DXCC on 160 is possible with lower power, i.e. 100 watts, even on phone. I have 117 worked and 108 confirmed on 160. Of the 117 worked, 103 were with; /archives//html/Topband/2002-05/msg00180.html (6,766 bytes)
17. Topband: 160 DX (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Mon, 15 Apr 2002 18:10:34 +0100; Members of the Topband Phone DXers Group worked PY3CEJ in southern Brazil last night on 1845 kc on phone. He was 59 when I worked him a few minutes after my local sunset at 0009 UTC and then was an h; /archives//html/Topband/2002-04/msg00034.html (6,666 bytes)
18. Topband: VK9MK & Propagation Condx (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Mon, 22 Apr 2002 17:22:00 +0100; For those of you who realize that you can reach DXCC faster by having an understanding of how 160 propagation works. I produce a non profit 7 Day Medium Wave Radio Propagation Outlook at: www.kn4lf.c; /archives//html/Topband/2002-04/msg00048.html (6,577 bytes)
19. Topband: MW Propgation Outlook Update #2002-10A (score: 1): Author: KN4LF, T. F. Giella" <kn4lf@tampabay.rr.com (KN4LF, T. F. Giella); Date: Fri, 29 Mar 2002 11:00:35 -0500; The KN4LF 7 Medium Wave Radio Propagation Outlook "Update" #2002-10A Published 10:00 AM EST 02/03/29 For 02/03/29-02/04/01. is out. This outlook update is issued to cover the CQ Worldwide SSB WPX Con; /archives//html/Topband/2002-03/msg00254.html (7,670 bytes)
20. Topband: Delta Loop (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sat, 10 Nov 2001 22:12:09 -0500; I put up what I call a squashed delta loop in Colorado in 1994 and it worked just fantastic. I put the base of the antenna 10 feet above ground, and the apex at 100 feet above ground. Using the formu; /archives//html/Topband/2001-11/msg00038.html (7,967 bytes)

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