Mail Archive Search: <+from:w8ji@contesting.com>

Results:

References: [ +from:w8ji@contesting.com: 1348 ]

Total 1348 documents matching your query.

41. Topband: R: fishing buoys (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 20 Dec 2002 16:06:37 -0500; There are markers that send a long dash followed by a normal CW sounding ID with a mix of letters and numbers. They only transmit every few minutes repeating the ID and a long dash a few times.These; /archives//html/Topband/2002-12/msg00250.html (8,963 bytes)
42. Topband: Beverage Page (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 26 Dec 2002 12:05:06 -0500; I've added construction details and a few photo's of insulators that last a long time, and insulators that fail quickly at: http://www.w8ji.com/beverages.htm Hopefully this will be helpful for first; /archives//html/Topband/2002-12/msg00276.html (6,966 bytes)
43. Topband: Spurious signals (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 29 Dec 2002 09:14:58 -0500; Since I wasn't in the contest (they wouldn't take my NA log file from last year), I decided to spend some time with an analyzer in the shack looking at signals. I identified 11 stations with strong s; /archives//html/Topband/2002-12/msg00287.html (7,313 bytes)
44. Topband: Stew Perry Spots!!!! (score: 1): Author: w8ji@contesting.com (Tom Rauch); Date: Sun, 29 Dec 2002 21:35:38 -0500; If you are making spots, it does not mean you are reading spots or using spots. As a matter of fact, single-ops are allowed to generate spots in other contests. It is reading or **using** them that; /archives//html/Topband/2002-12/msg00297.html (7,601 bytes)
45. Topband: Spurious signals (score: 1): Author: w8ji@contesting.com (Tom Rauch); Date: Sun, 29 Dec 2002 21:36:13 -0500; Only on or near the operating frequency. If someone forwards me a copy of a PIN switched ETO amplifier, I'll put the diagram up on a web page and show the feedback path and how to cure it. If you ha; /archives//html/Topband/2002-12/msg00299.html (7,820 bytes)
46. Topband: WAV recording (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 30 Dec 2002 10:22:38 -0500; If you are interested in what your unmodified FT1000MP, MKV, or other rig sounds like when the signal is only moderately strong and the receiving station has a low noise floor, you can hear some wav; /archives//html/Topband/2002-12/msg00306.html (6,496 bytes)
47. Topband: Propagation during the Stew Perry (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 30 Dec 2002 11:18:01 -0500; 73, Tom W8JI W8JI@contesting.com; /archives//html/Topband/2002-12/msg00307.html (6,627 bytes)
48. Topband: Amp Stability (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 30 Dec 2002 11:18:03 -0500; The problem is no one wants to burn a couple dB at 500-1500 watts, and even if you did where would you put the heat?? On VHF amps I use diplexers (as are also used for mixers). It is always possible; /archives//html/Topband/2002-12/msg00308.html (7,191 bytes)
49. Topband: Loop Antenna (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 10 Nov 2002 08:04:33 -0500; That antenna is both far from resonance and close to ground. Even if you managed to feed it as a vertically polarized loop, it would have considerable earth loss because of height and feedline loss; /archives//html/Topband/2002-11/msg00036.html (8,844 bytes)
50. Topband: Inverted L Directivity (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 10 Nov 2002 19:20:11 -0500; The directivity change is very small in most cases, I am sure it is not worth worrying about. The antenna would have to be very poor in performance to have any noticeable directivity from the horizo; /archives//html/Topband/2002-11/msg00040.html (8,720 bytes)
51. Topband: R: Inverted L Directivity (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 11 Nov 2002 08:39:00 -0500; The only study linking non-ionizing radiation to health risks was based on fraudulent data. Everything else shows unless you actually heat the cells nothing happens. It takes an extreme amount of po; /archives//html/Topband/2002-11/msg00046.html (8,148 bytes)
52. Topband: Short monopoles (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 12 Nov 2002 05:00:18 -0500; The VLF antennas with multiple tuned drops never worked as claimed, and gradually were abandoned over time for more simple setups that produced higher efficiency. One example in the NE USA even made; /archives//html/Topband/2002-11/msg00055.html (8,268 bytes)
53. Topband: RF CHOKE at 160 meters (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 14 Nov 2002 08:04:22 -0500; Hi Dan, You'd better know what the common mode impedance of the shield is, or use a much bigger choke. Otherwise you could either be wasting time with little change, or actually making the system wo; /archives//html/Topband/2002-11/msg00077.html (8,585 bytes)
54. Topband: QRSS on 160m (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 14 Nov 2002 21:21:24 -0500; ....and what should those criteria be Doug? To other ops QRSS is just like someone outputting a very long steady series of carriers, like someone not quite able to get the tuner adjusted! That's OK; /archives//html/Topband/2002-11/msg00083.html (8,037 bytes)
55. Topband: 40/80/160 Meter Antenna (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 15 Nov 2002 08:20:58 -0500; Hi Jim, I measured dozens of traps here a few years ago. Typical rankings are: Copper tubing and vacuum cap: 300,000 ohm Rp 60pF doorknob and #10 airdux: 250,000 ohm Rp 100pF doorknob and #12 airdux; /archives//html/Topband/2002-11/msg00088.html (8,753 bytes)
56. Topband: 40/80/160 Meter Antenna (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 15 Nov 2002 20:38:02 -0500; That's correct, and of course this also applies to trapped dipoles and yagis as well as low band antennas. The exception would be "traps" using very low C and high inductive reactance, which may hav; /archives//html/Topband/2002-11/msg00093.html (8,107 bytes)
57. Topband: Signal on 1907.2 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 17 Nov 2002 20:37:00 -0500; It is definitely a BC station parasitic, and it is strong but appears to be at least a few hundred miles from me because directivity is very good on both verticals and beverages. As near as I can te; /archives//html/Topband/2002-11/msg00104.html (7,427 bytes)
58. Topband: Center support on K9AY Loop (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 20 Nov 2002 20:40:56 -0500; Hi Tom, It makes absolutely no difference at all if you use a metal pole or non-metallic pole as long as you insulate the pole from the wire. The antenna is a fairly low impedance antenna, and any e; /archives//html/Topband/2002-11/msg00116.html (7,951 bytes)
59. Topband: Center support on K9AY Loop (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 21 Nov 2002 09:56:23 -0500; 2dB null depth variation is the extreme with the mast near the wire. It would be even less if the mast were insulated at the antenna by a few feet of PVC, and less still if the mast were floated at; /archives//html/Topband/2002-11/msg00122.html (8,896 bytes)
60. Topband: Define "near" (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 21 Nov 2002 20:19:18 -0500; Here at my QTH, a 4-element array of short RX verticals (a K9AY is really the electrical equivalent of two short verticals phased with a open feed wire) has noticeable deterioration of pattern when; /archives//html/Topband/2002-11/msg00127.html (7,795 bytes)

Current List: 41 - 60
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]