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References: [ 27 ]

Total 27 documents matching your query.

1. [RFI] power line noise - approaches to the utility (score: 1)
Author: (Tom Cox)
Date: Mon, 02 Dec 2002 12:58:02 -0500
This seems like a legitimate approach to me, Bill. The point is not to settle on one argument and pound the power company over the head with it incessantly. Provide them with more than one good reas
/archives//html/RFI/2002-12/msg00013.html (8,135 bytes)

2. [RFI] Re: alarm system RFI (score: 1)
Author: (Tom Cox)
Date: Mon, 04 Nov 2002 15:10:49 -0500
I think if I were to have a security system installed these days, I'd specify that all runs use Category 5e UTP. It has to be resistant to RFI in order to work to Ethernet standard, so its eight cond
/archives//html/RFI/2002-11/msg00007.html (7,607 bytes)

3. [RFI] PAR electronics notch filters (score: 1)
Author: (Tom Cox)
Date: Thu, 14 Nov 2002 09:09:49 -0500
Does anyone on the list have experience with the Par Electronics notch filters? The approach makes sense -- notching out those really powerful paging transmitter freqs in the 152 and 158 MHz range on
/archives//html/RFI/2002-11/msg00030.html (6,862 bytes)

4. [RFI] PAR electronics notch filters (score: 1)
Author: (Tom Cox)
Date: Thu, 14 Nov 2002 10:16:50 -0500
Excellent feedback. Thanks! THE THREE CAN VERSION. YOU CAN STILL SCAN THE UTILITY FREQUENCIES, my 2710 used to open up when i got near my office complex, abut 2000 ft
/archives//html/RFI/2002-11/msg00031.html (8,149 bytes)

5. [RFI] Re: Subwoofer does CW (score: 1)
Author: (Tom Cox)
Date: Sun, 24 Nov 2002 12:23:11 -0500
Do you have a current mode balun (W2DU or equivalent) at the input to the tuning network of your antenna? I wonder if there's common-mode radiation from the outside of your feedline. Is the feedline
/archives//html/RFI/2002-11/msg00036.html (6,636 bytes)

6. [RFI] "Zap checker" (score: 1)
Author: (Tom Cox)
Date: Tue, 13 Aug 2002 10:17:29 -0500
Does anyone else have any experience with the Zap Checker field strength meter? We decided to try one for our wireless network troubleshooting and setup tool kit, since it's inexpensive and covers th
/archives//html/RFI/2002-08/msg00032.html (6,392 bytes)

7. [RFI] Re: RFI digest, Vol 1 #130 - 2 msgs (score: 1)
Author: (Tom Cox)
Date: Tue, 09 Jul 2002 11:45:31 -0500
73, Tom Cox, KA5NEE/9 To: <>
/archives//html/RFI/2002-07/msg00007.html (7,934 bytes)

8. [RFI] Interesting link (score: 1)
Author: Tom Cox <>
Date: Mon, 15 Sep 2003 08:49:18 -0500
Now, here's an outfit that takes RFI seriously, judging from this memo, found accidentally while searching Google for "conductive paint:"
/archives//html/RFI/2003-09/msg00021.html (6,342 bytes)

9. [RFI] RFI FROM nearby AM station (score: 1)
Author: Tom Cox <>
Date: Tue, 30 Dec 2003 11:47:19 -0500
Happy Holidays, Everyone! I am looking for a practical, reasonable-cost way to keep RF from a nearby AM broadcast station out of the receiver of my IC746 when I have a 160M half-sloper connected to i
/archives//html/RFI/2003-12/msg00116.html (6,809 bytes)

10. [RFI] Re: QRM from AM broadcast (score: 1)
Author: Tom Cox <>
Date: Wed, 31 Dec 2003 15:39:28 -0500
Thanks to all who responded to my request for info. All replies were helpful, and I'm sure I'll get something done before long. I may make use of two or more different approaches suggested, just to r
/archives//html/RFI/2003-12/msg00118.html (11,685 bytes)

11. [RFI] replies -- QRM from AM BDCST station (score: 1)
Author: Tom Cox <>
Date: Fri, 02 Jan 2004 16:07:10 -0500
Skip, Good idea. I tried to put all responses together for the list. I didn't get any requests to keep private replies off the list, but just in case, preemptive apologies. Also, apologies for any re
/archives//html/RFI/2004-01/msg00000.html (11,548 bytes)

12. [RFI] CQ-BPL (score: 1)
Author: Tom Cox <>
Date: Fri, 30 Jan 2004 13:14:40 -0500
I have a new approach to the BPL interference discussion. I'm quite certain no one on this list would engage in any activity by Amateur Radio Operators that would deliberately reduce the effectivenes
/archives//html/RFI/2004-01/msg00061.html (8,305 bytes)

13. [RFI] Re: CQ-BPL (score: 1)
Author: Tom Cox <>
Date: Fri, 30 Jan 2004 20:46:04 -0500
Power lines as passive antenna elements; "BPL-finder" beacons (I like that one, especially); "use it or lose it" (all too true)... Good thread! Thanks for the comments, creative thinking and humor. T
/archives//html/RFI/2004-01/msg00071.html (6,556 bytes)

14. [RFI] interesting new device (score: 1)
Author: Tom Cox <>
Date: Thu, 05 Feb 2004 11:41:48 -0500
Ahoy, List, Here's an interesting new, one-chip data radio that could cause us some grief, but might also represent some opportunities for experimenting:
/archives//html/RFI/2004-02/msg00009.html (8,443 bytes)

15. [RFI] Line noise (score: 1)
Author: Tom Cox <>
Date: Thu, 05 Feb 2004 20:26:36 -0500
John, I recommend the AC POWER INTERFERENCE HANDBOOK, by Marv Loftness, KB7KK (Available from ARRL and elsewhere), if you don't already have it. It sounds like you already know quite a bit, but this
/archives//html/RFI/2004-02/msg00016.html (6,939 bytes)

16. [RFI] BSL with "WiFi" last-mile connection (score: 1)
Author: Tom Cox <>
Date: Mon, 09 Feb 2004 12:49:17 -0500
The idea of passing BSL over high voltage distribution lines and then sending it to subscribers via 2.4 GHz digital radios is interesting. This connection method uses two Part 15 (unlicensed) media,
/archives//html/RFI/2004-02/msg00057.html (7,741 bytes)

17. [RFI] As if BPL weren't enough... (score: 1)
Author: Tom Cox <>
Date: Fri, 20 Feb 2004 22:02:17 -0500
Don't bother to call the FCC about this one -- Tom, KT9OM _______________________________________________ RFI mailing list RFI
/archives//html/RFI/2004-02/msg00119.html (6,495 bytes)

18. [RFI] BPL -- copy of letter to st. URC (score: 1)
Author: Tom Cox <>
Date: Thu, 04 Mar 2004 18:41:43 -0500
I sent the following e-mail to the Indiana Utility Regulatory Commission, just as a preemptive strike. The Cinergy news release struck close enough to home to get me motivated. ++++++++++++++++++++++
/archives//html/RFI/2004-03/msg00006.html (8,867 bytes)

19. [RFI] No BPL in UK? (score: 1)
Author: Tom Cox <>
Date: Thu, 29 Apr 2004 17:01:47 -0500
Funny, BT expects the UK to get Internet just about everywhere, and BPL has nothing to do with it. Note the last paragraph, concerning rural penetration. (See below.) 73, Tom, KT9OM
/archives//html/RFI/2004-04/msg00124.html (7,972 bytes)

20. [RFI] Low-VHF in Indiana (score: 1)
Author: Tom Cox <>
Date: Sun, 18 Jul 2004 13:03:34 -0500
According to, the Indiana State Police still use the following frequencies (MHz) in several areas, mainly rural: 42.1200 -- F-3 Car-to-Car 42.1600 -- F-4 Tactical 42.2000 -- Surveill
/archives//html/RFI/2004-07/msg00070.html (6,939 bytes)

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