Mail Archive Search: <+from:W8JI@contesting.com>

Results:

References: [ +from:W8JI@contesting.com: 1348 ]

Total 1348 documents matching your query.

21. Topband: Electric Fence QRM (score: 1): Author: w8ji@contesting.com (Tom Rauch); Date: Sun, 01 Dec 2002 06:25:24 -0500; The longest distance I have heard them is about 3-4 miles, but they can certainly carry much further I'm sure. 73, Tom W8JI W8JI@contesting.com; /archives//html/Topband/2002-12/msg00002.html (7,165 bytes)
22. Topband: Electric Fence QRM (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 01 Dec 2002 08:58:36 -0500; Maybe. Maybe not. Newer chargers, at least all I have seen, are sharp pulses that make tics. Most of the fences around here have newer chargers, but there are a couple old ones around here that buzz; /archives//html/Topband/2002-12/msg00006.html (7,472 bytes)
23. Topband: ANC-4 noise canceller (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 03 Dec 2002 11:43:48 -0500; Hi Brad, I usually don't dissuade anyone from any particular manufacturer or product, but if you are considering a noise canceller I'd get the MFJ1025. If anything will work for your case, it will.; /archives//html/Topband/2002-12/msg00040.html (9,010 bytes)
24. Topband: ANC-4 noise canceller (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 03 Dec 2002 22:03:36 -0500; A noise canceller can function two ways. It can make your antenna into a directional antenna that has a null towards the noise. Think of it as creating a phase and level adjustable two-element array; /archives//html/Topband/2002-12/msg00048.html (8,372 bytes)
25. Topband: vert & beverages (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 03 Dec 2002 22:03:38 -0500; I wrote an article in the early 80's describing how to use coax, twin lead, or any other transmission line to make a Reflection Beverage. I had a similar article in Communications Quarterly. The poi; /archives//html/Topband/2002-12/msg00049.html (7,681 bytes)
26. Topband: NORD and UG top loaded antennas (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 04 Dec 2002 11:36:45 -0500; Hi John, They issue patents for anything, including things that never actually work as claimed. I looked at my Vertical Handbook, and I have to say the section on small antennas was the first disapp; /archives//html/Topband/2002-12/msg00056.html (9,732 bytes)
27. Topband: MFJ noise canceller (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 04 Dec 2002 21:40:54 -0500; None of these units should be placed between a low-level reasonably quiet antenna and a gain stage. Every system available uses multiple stages and has many components that will raise noise floor. T; /archives//html/Topband/2002-12/msg00070.html (7,187 bytes)
28. Topband: MFJ noise canceller (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 05 Dec 2002 16:19:24 -0500; Or try this link........... http://www.w8ji.com/mfj-1025_1026.htm73, Tom W8JI W8JI@contesting.com; /archives//html/Topband/2002-12/msg00088.html (7,339 bytes)
29. Topband: Inductors vs. NORD and UG top loaded antennas (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 07 Dec 2002 20:28:15 -0500; Optimum L/D varies with the required inductance, and about a dozen other things. The most comprehensive text in general publication is in Antennas and Transmission Lines by John Kuecken. It was out; /archives//html/Topband/2002-12/msg00107.html (7,797 bytes)
30. Topband: 4. MFJ noise canceller (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 08 Dec 2002 22:18:38 -0500; Unless you use at least a 10dB 50 ohm pad on the receiver input, and know that the source is 50 ohms, the results actually don't mean very much. Measurements made with a commercial 50-ohm network an; /archives//html/Topband/2002-12/msg00121.html (8,055 bytes)
31. Topband: Ground Rod at Radial Junction point (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 09 Dec 2002 13:06:03 -0500; I think that must have come from a discussion about elevated radials. With a small number of elevated radials, there is considerable voltage between the coax shield connect at the antenna and earth.; /archives//html/Topband/2002-12/msg00125.html (7,812 bytes)
32. Topband: DX Window-N4ZR (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 09 Dec 2002 19:55:33 -0500; Because unless there are penalties for things like spurious emissions or operating in the Window it will always continue. EY7AF actually had a good signal for a change on 1834, but naturally W/VE's; /archives//html/Topband/2002-12/msg00135.html (7,227 bytes)
33. Topband: Re: Yaesu FT1000mp Mark V Key Clicks (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 09 Dec 2002 21:20:02 -0500; That's only a starting point, but most important it isn't a sure test and it isn't the only common cause. Another common cause is using an amplifier with high gain tubes oscillating below the AM BC; /archives//html/Topband/2002-12/msg00137.html (9,530 bytes)
34. Topband: Re: Yaesu FT1000mp Mark V Key Clicks (score: 1): Author: w8ji@contesting.com (Tom Rauch); Date: Tue, 10 Dec 2002 06:27:19 -0500; The sad part about all of this is it wouldn't cost any manufacturer anything to correct 99% problems. It is a simple case of the designers either not understanding how to select component values or; /archives//html/Topband/2002-12/msg00146.html (9,071 bytes)
35. Topband: Re: Yaesu FT1000mp Mark V Key Clicks (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 10 Dec 2002 09:01:14 -0500; This problem comes up every year and will only get worse with time. All of the nasty FT1000's and other radios will be around until we all pass away. Those radios are not going to be tossed out. This; /archives//html/Topband/2002-12/msg00150.html (11,784 bytes)
36. Topband: ARRL 160 contest (score: 1): Author: w8ji@contesting.com (Tom Rauch); Date: Tue, 10 Dec 2002 13:51:14 -0500; Amen. Craig hit the problem right on the head, at least so far as DX is concerned. The real problem is many people who rarely work 160, or who are parked on a coastline with all the US behind them,; /archives//html/Topband/2002-12/msg00162.html (8,343 bytes)
37. Topband: K9AY Loop Revisited (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 12 Dec 2002 06:57:04 -0500; I hope I don't get into trouble but.... There isn't any evidence that a short metal mast hurts performance, but there is strong evidence the antenna is dependent on a moderately good ground and that; /archives//html/Topband/2002-12/msg00186.html (10,971 bytes)
38. Topband: Noise and ground loops (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 14 Dec 2002 06:04:04 -0500; If the model is too sensitive through violation of guidelines, it can not be used to predict any interaction with anything Gary. But all that aside, there are very logical and reasonable engineering; /archives//html/Topband/2002-12/msg00203.html (8,794 bytes)
39. Topband: Common Mode Noise (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 15 Dec 2002 00:19:22 -0500; I have an article up on my site now at: www.w8ji.com/common-mode_noise.htm I hope this explains in detail why I strongly feel antenna signal grounds should never be directly connected to coax grounds; /archives//html/Topband/2002-12/msg00208.html (6,878 bytes)
40. Topband: STRIPPING ENAMEL WIRE (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 18 Dec 2002 19:32:29 -0500; I use medium or fine grit sandpaper when it is not a heat-stripping type of enamel. The smaller the wire the finer the grit. Fold and hold the paper between your thumb and a finger, and pull the wire; /archives//html/Topband/2002-12/msg00234.html (6,907 bytes)

Current List: 21 - 40
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]