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21. Topband: Antennas (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Sun, 26 Aug 2001 23:21:05 +0000; While going through my low band antenna notes covering the last 40 years or so, I came across a few contradicting pieces of data. Trying to resolve the issues with computer modeling exercises only re; /archives//html/Topband/2001-08/msg00110.html (9,420 bytes)
22. Topband: Re: Antennas (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Mon, 27 Aug 2001 13:42:30 +0000; It seemed like a good idea at the time! There was no real "hat", just a 12 foot "stinger". I did get a bit better bandwidth, but not enough to make the exorcise worth the effort. 73, Larry; /archives//html/Topband/2001-08/msg00115.html (6,681 bytes)
23. Topband: Antennas (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Mon, 27 Aug 2001 14:30:49 +0000; As I said, Mauri, my experience and modeling efforts agree with your assessment. I think I need to define "short". Some folks seem to think a short vertical is a couple feet less than a quarter wave.; /archives//html/Topband/2001-08/msg00116.html (8,886 bytes)
24. Topband: Antennas (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Mon, 27 Aug 2001 14:51:05 +0000; Very true. That's why I always base my conclusions on observations made over a span of years. Log entries are a fair filter of "measurement noise" and, after all, isn't the "best" antenna the one tha; /archives//html/Topband/2001-08/msg00119.html (9,168 bytes)
25. Topband: Antennas - Part 2 (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Tue, 28 Aug 2001 03:51:11 +0000; Here's the second part of my "quest for the truth"! While trying to validate performance test results with computer models, I find more conflicts with the effect of inductor Q on overall performance.; /archives//html/Topband/2001-08/msg00128.html (7,148 bytes)
26. Topband: Preamp for pennant (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Tue, 28 Aug 2001 14:20:17 +0000; Ford, The caps were indeed chosen to provide some small measure of roll-off at the low end. The first values used in the original version were 0.1 uF. That original low-bias version IMD performance w; /archives//html/Topband/2001-08/msg00133.html (8,275 bytes)
27. Topband: Antennas (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Tue, 28 Aug 2001 15:09:09 +0000; Mauri, That's exactly why I presented the problem to the list. This is, after all, AMATEUR RADIO, not a military exorcise or commercial broadcast. Just a bunch of hobbyists trying to do the best they; /archives//html/Topband/2001-08/msg00134.html (9,545 bytes)
28. Topband: Antennas (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Tue, 28 Aug 2001 15:59:51 +0000; Herb, I've never tried this because in every instance where I needed a "hat", I have been limited to only two drooping wires. Is this data from computer modeling or actual measurement? Is the 30 perc; /archives//html/Topband/2001-08/msg00136.html (8,670 bytes)
29. Topband: Drooping top hats (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Wed, 29 Aug 2001 14:37:21 +0000; Mauri, Thanks for taking to time to run the models. Very interesting data. In past portable/temporary setups I have had, the political duress (wife, neighbors, landlord) caused by dangling wires far; /archives//html/Topband/2001-08/msg00144.html (7,304 bytes)
30. Topband: modeling question (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Tue, 27 Mar 2001 00:02:44 +0000; Mario and Tom raise interesting points. When I changed out the old TH6 for a nice shiny C31XR I worried about the insulated elements. I asked Force 12 about it. I was told there has been only one rep; /archives//html/Topband/2001-03/msg00144.html (8,149 bytes)
31. Topband: 160 Meter Propagation (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Sat, 06 Jan 2001 15:00:28 +0000; Hi Bob, Please elaborate. The bearings and distance from my QTH to JA are 310°/52°/9331 km. The bearings and distance from my QTH to DL are 34°/312°/8820 km. With similar, but opposit; /archives//html/Topband/2001-01/msg00052.html (8,584 bytes)
32. Topband: 160 Meter Propagation (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Sat, 06 Jan 2001 19:54:14 +0000; Bob, Thanks for clearing up the low latitude ducting question. You're right, I let the low latitude aspect get completely past me when I asked the question. You're explanation clears up a lot of the; /archives//html/Topband/2001-01/msg00060.html (10,031 bytes)
33. Topband: 160 Meter Propagation (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Sun, 07 Jan 2001 04:37:24 +0000; Earl and others, I'm still having trouble with this. From me to JA is about 20% over land. To EU is about over 55% or 60% land. Given the propagation stations in other geographical areas have across; /archives//html/Topband/2001-01/msg00065.html (10,258 bytes)
34. Topband: 160 Meter Propagation (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Sun, 07 Jan 2001 15:06:59 +0000; Interesting. I wonder how it calculates the zone. If I can believe the satellite data at all, the auroral zone is usually oval shape and frequently irregular at that. Also, seldom centered on the pol; /archives//html/Topband/2001-01/msg00075.html (9,778 bytes)
35. Topband: 160 Meter Propagation (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Mon, 08 Jan 2001 00:06:38 +0000; Bob, Thanks for the info. Your post cleared up a lot of loose ends for me. Is there any data at all which would indicate the ionization zone might trend toward some size relationship to the optical z; /archives//html/Topband/2001-01/msg00083.html (8,394 bytes)
36. Topband: Loop-family antenna notes (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Fri, 01 Dec 2000 22:34:39 -0100; In the 38 years or so I've been on 160, I could count on the fingers of one hand the number of times a small loop has been better (on DX) than any other antenna, including the TX antenna. That is unt; /archives//html/Topband/2000-12/msg00006.html (8,519 bytes)
37. Topband: Loop-family antenna notes (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Sun, 03 Dec 2000 23:34:42 -0100; I'd like to point out that while Flags, Pennants, Deltas, etc, do have a high angle response, it is an order of magnitude or so less than the small loop. It was quite easy to observe this over the la; /archives//html/Topband/2000-12/msg00020.html (8,002 bytes)
38. Topband: Preamp update (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Wed, 06 Dec 2000 01:11:33 -0100; Since posting on my web page the pre-amp design I use with flags, pennants, etc., I have had a number of requests for the "new" design I mentioned. I have revised the Rotatable Flag page and provided; /archives//html/Topband/2000-12/msg00046.html (7,148 bytes)
39. Topband: Phased "Flags" (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Thu, 28 Dec 2000 15:30:09 -0100; Still pursuing the optimum RX antenna system for my QTH, I put up a pair of Flags spaced 315 feet and fed in phase for broadside operation. (equal lengths coax to a 0° splitter/summer) Initially; /archives//html/Topband/2000-12/msg00171.html (8,174 bytes)
40. Topband: Beverage tuning aid (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Thu, 28 Dec 2000 23:18:01 -0100; The reference I use for identifying AM stations is the FCC AMQ AM Radio Database Query at: http://www.fcc.gov/mmb/asd/amq.html#sprung3 This database allows you to search on call sign, frequency, or l; /archives//html/Topband/2000-12/msg00177.html (6,877 bytes)

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