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1. TopBand: Magnetic loops (score: 1): Author: tosigurd@online.no (Tom Sigurdssøn; Date: Tue, 02 Dec 1997 22:09:16 +0100; Hello all. I would like to get in touch with someone who has used/built magnetic loops for use on 160. Preformance-reports are welcome too. 73 de Tom, LA9GX -- FAQ on WWW: http://www.contesting.com/t; /archives//html/Topband/1997-12/msg00045.html (6,579 bytes)
2. TopBand: Magnetic loops (score: 1): Author: n7cl@mmsi.com (Eric Gustafson); Date: Tue, 2 Dec 1997 17:10:46 -0700; To: <topband@contesting.com> Tom, Please define what you mean by "magnetic loop" so we know if we can help you. There have been several very different loop antenna configurations referred to as "magn; /archives//html/Topband/1997-12/msg00048.html (7,270 bytes)
3. Topband: Magnetic loops (score: 1): Author: "D. S. Coleman" <cwforever2@gmail.com>; Date: Thu, 12 Apr 2012 10:44:59 -0400; All: I can comment on my experiences with a magnetic loop, as I have one, along with three one-wavelength beverages, and a pennant terminated loop. Each of those antennas, at one time or another, pro; /archives//html/Topband/2012-04/msg00098.html (9,460 bytes)
4. Topband: Magnetic Loops (score: 1): Author: Bob K6UJ <k6uj@pacbell.net>; Date: Tue, 21 May 2013 08:40:27 -0700; Sometimes my local power line noise is about S8 or so on 160. I am considering the purchase of one of these magnetic loop antennas for receiving to see if it helps. Anyone have one of these ? How wel; /archives//html/Topband/2013-05/msg00117.html (6,335 bytes)
5. Re: Topband: Magnetic Loops (score: 1): Author: "Anthony Muttillo" <k8alm@sbcglobal.net>; Date: Tue, 21 May 2013 12:17:09 -0400; I have a Pixel RF PRO-1B and I think it does a great job with local noise and not just on 160. For me it was well worth the price. Tony K8ALM Sometimes my local power line noise is about S8 or so on; /archives//html/Topband/2013-05/msg00119.html (8,045 bytes)
6. Re: Topband: Magnetic Loops (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Tue, 21 May 2013 09:29:05 -0700; On 5/21/2013 8:40 AM, Bob K6UJ wrote: Sometimes my local power line noise is about S8 or so on 160. I am considering the purchase of one of these magnetic loop antennas for receiving to see if it hel; /archives//html/Topband/2013-05/msg00120.html (9,480 bytes)
7. Re: Topband: Magnetic Loops (score: 1): Author: W2PM <w2pm@aol.com>; Date: Tue, 21 May 2013 12:32:33 -0400; Covered many times here over the years. Yes mag loops wil help loads with local crud noise if they are in a certain direction you can null to. If the noise is all surrounding as it would be in many h; /archives//html/Topband/2013-05/msg00121.html (8,883 bytes)
8. Re: Topband: Magnetic Loops (score: 1): Author: "Dave Harmon" <k6xyz@sbcglobal.net>; Date: Tue, 21 May 2013 11:32:48 -0500; I originated some discussion recently on this list and the guys that had tried this type of antenna all said that they would not buy one of them again. You can search the archives for the comments. D; /archives//html/Topband/2013-05/msg00122.html (8,140 bytes)
9. Re: Topband: Magnetic Loops (score: 1): Author: Herb Schoenbohm <herbs@vitelcom.net>; Date: Wed, 22 May 2013 12:39:02 -0400; A better and easier and lower cost solution IMHO would be a pair of phased K9AY by using the MFJ-1026 and adjusting them for the best null on the noise location. Unfortunately this will also reduce t; /archives//html/Topband/2013-05/msg00123.html (10,449 bytes)
10. Re: Topband: Magnetic Loops (score: 1): Author: Ashton Lee <Ashton.R.Lee@hotmail.com>; Date: Tue, 21 May 2013 10:51:14 -0600; I have the Wellbrook at 2 QTHs and it works way better than using a transmit antenna on receive. It also works very well early in the evening when signals are still iffy and coming in at all angles.; /archives//html/Topband/2013-05/msg00125.html (10,984 bytes)
11. Re: Topband: Magnetic Loops (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Tue, 21 May 2013 12:54:29 -0400; At best mag loop lowers the noise in two directions drastically - along with any signals in those two spots. But in the non null areas there are absolutely no characteristics of the loop which are be; /archives//html/Topband/2013-05/msg00126.html (9,775 bytes)
12. Re: Topband: Magnetic Loops (score: 1): Author: Gary and Kathleen Pearse <pearse@gci.net>; Date: Tue, 21 May 2013 10:55:57 -0800; I've had a Wellbrooke loop for a few years at 20' on a TV rotator. It nulls a single nearby QRN source NW at 300 deg true. EU is about 15-30 deg from here. When 160 or 80 are open over the N Pole, it; /archives//html/Topband/2013-05/msg00127.html (8,024 bytes)
13. Re: Topband: Magnetic Loops (score: 1): Author: "Andy Ikin" <andrew.ikin@btopenworld.com>; Date: Tue, 21 May 2013 20:19:03 +0100; Richard Karlquist wrote on May 21. It is important to understand that these loops have a circumference of 10 feet, which they are limited to because the manufacturers want to offer a bandwidth up to; /archives//html/Topband/2013-05/msg00128.html (9,531 bytes)
14. Re: Topband: Magnetic Loops (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Tue, 21 May 2013 16:06:53 -0400; If you test some popular loop antennas for pattern, which I have done, you will find many have significant skewing in the nulls. The nulls often are not 180 degrees apart. This proves the loop is in; /archives//html/Topband/2013-05/msg00129.html (9,496 bytes)
15. Re: Topband: Magnetic Loops (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Tue, 21 May 2013 13:33:33 -0700; I tried to address this issue in the feed system I described in NCJ. Instead of a "balun" (meaning a bifilar transmission line transformer), this design uses a true flux coupled transformer. This giv; /archives//html/Topband/2013-05/msg00130.html (10,079 bytes)
16. Re: Topband: Magnetic Loops (score: 1): Author: Gary and Kathleen Pearse <pearse@gci.net>; Date: Tue, 21 May 2013 12:48:41 -0800; Expecting this and given the proximity of my transmission antennas to the Wellbrook Loop (50-100'), I put 10 Type 31 slip-on beads over each end of the RG8-X feed and rotator control cable, and insul; /archives//html/Topband/2013-05/msg00131.html (8,607 bytes)
17. Re: Topband: Magnetic Loops (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Tue, 21 May 2013 21:44:22 -0400; Expecting this and given the proximity of my transmission antennas to the Wellbrook Loop (50-100'), I put 10 Type 31 slip-on beads over each end of the RG8-X feed and rotator control cable, and insul; /archives//html/Topband/2013-05/msg00132.html (11,795 bytes)
18. Re: Topband: Magnetic Loops (score: 1): Author: Gary and Kathleen Pearse <pearse@gci.net>; Date: Tue, 21 May 2013 18:01:01 -0800; Thanks Tom for the explanation. As always, this is a learning Reflector. Part of my location involves potential BCB, power line, adjacent home electronics, and of course the legal limit transmissions; /archives//html/Topband/2013-05/msg00134.html (9,904 bytes)
19. Re: Topband: Magnetic Loops (score: 1): Author: "Andy Ikin" <andrew.ikin@btopenworld.com>; Date: Wed, 22 May 2013 13:18:16 +0100; Gary wrote on May 21. I've had a Wellbrooke loop for a few years at 20' on a TV rotator. It nulls a single nearby QRN source NW at 300 deg true. EU is about 15-30 deg from here. When 160 or 80 are op; /archives//html/Topband/2013-05/msg00140.html (9,136 bytes)
20. Re: Topband: Magnetic Loops (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Tue, 21 May 2013 16:19:41 -0400; Actually a properly designed purpose built loop can offer a reduction in noise from the high Q selectivity offered. A 2 turn balanced loop made from 1" mostly air dielectric CATV hardline has been in; /archives//html/Topband/2013-05/msg00153.html (11,624 bytes)

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