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1. [RFI] Mobile and Dayton Hamvention RFI (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 31 Aug 2003 20:58:38 -0400; Speaking of mobile, when I was at the last Dayton Hamvention I had to shut my radio off on a few roads around Needmore road. There was huge QRM that sounded like something from a computer system blan; /archives//html/RFI/2003-08/msg00165.html (7,358 bytes)
2. [RFI] Power Line Engineer or Experienced PL Worker (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Fri, 5 Sep 2003 05:08:04 -0400; I'm looking for an experienced power line construction worker or distribution engineer with good credentials or experience who can help with a project related to poor or sloppy power line constructio; /archives//html/RFI/2003-09/msg00003.html (6,886 bytes)
3. Re: [RFI] High noise level.... (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 10 Sep 2003 10:04:49 -0400; get rid of the noise. As you can imagine this amount of noise drives me crazy when trying to work anything from the west. Or is it something i will have to put up with?? We really can't filter noise; /archives//html/RFI/2003-09/msg00005.html (7,510 bytes)
4. Re: [RFI] high noise level... (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 11 Sep 2003 07:50:19 -0400; Paul, I ALWAYS use a balun with any balanced directional antenna, because even small amounts of common mode can cause loss of directivity by filling in nulls. It just is a very good habit to get into; /archives//html/RFI/2003-09/msg00008.html (7,864 bytes)
5. Re: [RFI] high noise level... (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 11 Sep 2003 20:15:06 -0400; There is a reason you don't hear of that problem much, although I agree it is possible. The coax connects DIRECTLY to the antenna element. The Rotor and tower are only close by, and obviously are co; /archives//html/RFI/2003-09/msg00015.html (8,531 bytes)
6. Re: [RFI] high noise level... (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 11 Sep 2003 20:32:44 -0400; The problem with a shield is it simply re-radiates whatever common mode currents are in the system. Add another shield on top, and it does the same. They are especially useless if one end is left fl; /archives//html/RFI/2003-09/msg00016.html (8,561 bytes)
7. Re: [RFI] high noise level... (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Fri, 12 Sep 2003 10:48:33 -0400; Hi Ian, I agree a gamma match isn't good. I've actually had feedlines arc to the tower legs when using a Gamma match on a Wilson 20m Yagi. But in that case, the problem is the boom and the entire tow; /archives//html/RFI/2003-09/msg00020.html (9,831 bytes)
8. [RFI] Fw: Topband: BPL & Ambient Corp. (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 2 Oct 2003 05:11:28 -0400; Just got this off the Lone Star DXA reflector. It seems to be bad news. http://www.ambientcorp.com/default.asp?PID=69 _______________________________________________ Topband mailing list Topband@cont; /archives//html/RFI/2003-10/msg00002.html (6,973 bytes)
9. Re: [RFI] rfi from elevator control panels in Highrise apartmentcomplex (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 7 Oct 2003 09:03:07 -0400; <<<I have installed di pole antenna for 40,20 and 15 meters in the terrace of the apartment complex which is on 22nd floor, the coex to my amateur radio rig( Yaesu FT 847) on 14th floor is abt 35 met; /archives//html/RFI/2003-10/msg00005.html (7,855 bytes)
10. Re: [RFI] HF RFI From Toshiba 32A42A 32" Television (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 29 Oct 2003 15:02:18 -0500; Mike, Be sure to let everyone know how the traditional common mode cures work. A Sony I looked at could not be cured without putting it inside a screened enclosure. It generated RFI at several hundre; /archives//html/RFI/2003-10/msg00019.html (7,852 bytes)
11. Re: [RFI] TV RFI (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 30 Oct 2003 20:05:51 -0500; I doubt a TV like that would pass FCC compliance. I'd pursue it with the ARRL and FCC. It isn't so much what WE buy that's a problem, it's what all our neighbors might buy!! I have a new 40" Sony and; /archives//html/RFI/2003-10/msg00029.html (7,670 bytes)
12. [RFI] WWRB (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 30 Oct 2003 21:06:09 -0500; WWRB in Tennessee http://www.wwrb.org/ has a new installation that is just killing 1805kHz with a mix from two transmitters (6890 and 5085kHz)! It is 20-40dB out of noise floor at my location. I'm al; /archives//html/RFI/2003-10/msg00030.html (6,789 bytes)
13. Re: [RFI] WWRB (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 1 Nov 2003 18:34:35 -0500; Hi Jimmy, These ratty BC stations amaze me. I suppose it is part of deregulation. I'm still trying to pin down the Spanish language station from south GA or N Fl that never gives a callsign. I hope I; /archives//html/RFI/2003-11/msg00001.html (7,709 bytes)
14. Re: [RFI] Sources For RFI Suppression Ferrites (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 3 Nov 2003 12:06:33 -0500; We really shouldn't select materials based on such loose generalities. 43 material has lower impedance per turn, but the Q reaches unity at very high frequencies. It is good for "high stress" HF app; /archives//html/RFI/2003-11/msg00006.html (8,517 bytes)
15. Topband: WWRB (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 30 Oct 2003 21:06:09 -0500; WWRB in Tennessee http://www.wwrb.org/ has a new installation that is just killing 1805kHz with a mix from two transmitters (6890 and 5085kHz)! It is 20-40dB out of noise floor at my location. I'm al; /archives//html/RFI/2003-11/msg00009.html (7,301 bytes)
16. Re: Topband: RE: [RFI] WWRB (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 5 Nov 2003 08:10:14 -0500; Hi Ed, near either >transmitter, or your own equipment or station. station >receiver. I'd like to assure everyone I would never publicly post a request for help unless I was absolutely positive the s; /archives//html/RFI/2003-11/msg00014.html (7,969 bytes)
17. Re: [RFI] Formal RFI complaint to the FCC (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 5 Nov 2003 11:35:50 -0500; I'm a little busy now to take on extra work, but I'd sure like to see people get started on these plasma TV's. I think it is major trouble in the brewing. It could be wind up being worse than BPL. 73; /archives//html/RFI/2003-11/msg00017.html (7,598 bytes)
18. Re: [RFI] Anyone heard of this type of noise? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 16 Nov 2003 10:30:17 -0500; Sounds like it could be related to a TV set, but it may be something else switching at around 15kHz. If it is reasonably stable, it is probably from the horizontal sweep of a TV set (15.75kHz as I re; /archives//html/RFI/2003-11/msg00034.html (7,599 bytes)
19. Re: [RFI] Anyone heard of this type of noise? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 17 Nov 2003 08:58:39 -0500; TV sets have been a problem for years, I had severe problems with birdies from sweep systems even in the early 60's, when I first became a Ham. In general TV's seem to be a bit better now than in ye; /archives//html/RFI/2003-11/msg00038.html (11,122 bytes)
20. Re: [RFI] TVI: suggestins needed! Help me (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 23 Nov 2003 16:59:23 -0500; Aldo, 1.) No TVI on dummy antenna This means you have no power line or chassis radiation problem. 2.) No help from low-pass filter This means the harmonics are generated outside the radio. 3.) You me; /archives//html/RFI/2003-11/msg00048.html (9,411 bytes)

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