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Total 89 documents matching your query.

1. [RFI] "Broadband over power lines closer to reality", articlesays (score: 1)
Author: n0tt1 at (
Date: Wed Jun 4 22:59:29 2003
The scuttlebutt at the DX club meeting monday night was that the part 15 rules would be amended...(gasp!) just how or to what extent, I don't know...could be big trouble for us hams if PLC gets impl
/archives//html/RFI/2003-06/msg00003.html (7,525 bytes)

2. [RFI] Odd QRM at AC0X (score: 1)
Author: n0tt1 at (
Date: Thu May 22 10:11:46 2003
Hi Ron, To me it sounds more like a data signal. Note that it sounds like it is "switching" from one state to another over the duration of the audio clip. Let's hope it's not caused by some common de
/archives//html/RFI/2003-05/msg00032.html (7,270 bytes)

3. [RFI] Terrible RFI (score: 1)
Author: n0tt1 at (
Date: Thu Mar 27 21:26:37 2003
Hi Bob, I can relate to that....don't give up! One important point (that you probably know) is to make *sure* that the noise isn't coming from your own house. Use a battery-powered radio and kill the
/archives//html/RFI/2003-03/msg00022.html (10,885 bytes)

4. [RFI] finding stray RF (score: 1)
Author: n0tt1 at (
Date: Sun Feb 9 13:38:26 2003
Ed, are you asking about a VHF receiver for powerline RFI detection? That was in March 2001 QST, page 32. I built the receiver and it works well. The last time I checked the kit of parts was no long
/archives//html/RFI/2003-02/msg00020.html (7,143 bytes)

5. [RFI] s7-s9 noise (score: 1)
Author: (
Date: Tue, 14 Jan 2003 22:16:13 +0000
I took a look at the telco ground in my home...found that the installer (a "real" telco installer before the telco rip-a-part) had wrapped several turns of excess ground wire around a copper cold wat
/archives//html/RFI/2003-01/msg00022.html (8,906 bytes)

6. [RFI] 160 Meter RFI Help Needed (score: 1)
Author: n0tt1 at (
Date: Sun Jan 26 22:52:52 2003
Hi Steve, The alarm circuit wiring is picking up the transmitted signal just like a receiving antenna. A lot of those kinds of problems can be cured on 160m by wrapping several turns of the alarm cab
/archives//html/RFI/2003-01/msg00067.html (7,941 bytes)

7. [RFI] RFI clip-on probe? (score: 1)
Author: n0tt1 at (
Date: Mon Jan 27 23:31:39 2003
On Mon, 27 Jan 2003 09:49:28 -0800 Wiley Sanders <> writes: ...think I saw a simple clamp-on probe in a search on the ARRL web. As I remember, it used a clothes pin for
/archives//html/RFI/2003-01/msg00077.html (7,208 bytes)

8. Re: [RFI] Formal RFI complaint to the FCC (score: 1)
Date: Wed, 5 Nov 2003 17:00:03 +0000
On Tue, 04 Nov 2003 21:24:09 -0800 (PST) "N6KJ" <> writes: In my view, that's 100% correct. One could openly carry a small portable radio into a store to check before buying a pro
/archives//html/RFI/2003-11/msg00019.html (8,546 bytes)

Date: Wed, 26 Nov 2003 17:31:23 +0000
Hi Gents, I want to build a snoop antenna to track down some RFI. I want to listen from the bottom of the AM broadcast band to perhaps 7 mhz and I want the antenna to be directional, portable, hand-h
/archives//html/RFI/2003-11/msg00055.html (7,473 bytes)

10. Re: [RFI] Re: [TowerTalk] electric fence qrn (score: 1)
Date: Wed, 10 Dec 2003 01:44:13 +0000
Would it do any good to install, say a ferrite choke, at any of the noisy pulsers? ....that's assuming there are no areas in the fence line that are arcing over. 73, Charlie N0TT ___________________
/archives//html/RFI/2003-12/msg00028.html (6,741 bytes)

11. Re: [RFI] Eliminating TVI (score: 1)
Date: Mon, 29 Dec 2003 03:01:38 +0000
right...and imagine that any RF noise on that safety groundING lead can pass right on out of one's shack over coax cable shields, etc, to the antenna field! Earth-grounding the shields when they lea
/archives//html/RFI/2003-12/msg00112.html (8,086 bytes)

12. [RFI] Plastic parabolic reflector (score: 1)
Date: Tue, 6 Jan 2004 01:35:46 +0000
Howdy Gents, Does anyone know where I can purchase a 18" diameter *clear plastic* parabolic reflector? I've looked and looked on the net and nil. This is a for my next homebrew "RFI tools" project. 7
/archives//html/RFI/2004-01/msg00006.html (6,434 bytes)

13. Re: [RFI] Can you identify this noise? (score: 1)
Date: Sun, 11 Jan 2004 18:38:29 +0000
Kirk, that sounds like some sort of machinery, or perhaps something like an AC powered electric fence "charger". Note the mostly regular, repetative beat. Can the noise be heard on lower frequencies
/archives//html/RFI/2004-01/msg00034.html (8,238 bytes)

14. Re: [RFI] My power line noise problems, revisited (Warning, thisislong!) No... (score: 1)
Date: Fri, 6 Feb 2004 22:20:19 +0000
True, one should find the troublesome structure *first* with a radio, but *then* use a ultrasonic detector to locate the piece(s) of hardware on that structure that are causing the problem. Mike, of
/archives//html/RFI/2004-02/msg00041.html (8,034 bytes)

15. Re: [RFI] My power line noise problems, revisited (Warning,thisislong!) No... (score: 1)
Date: Sat, 7 Feb 2004 03:02:27 +0000
can on a personally I have'nt heard about anyone recently...thank goodness! But, sure, go ahead and thump the poles if you must...and by the way that's not your property or my property to thump....h
/archives//html/RFI/2004-02/msg00043.html (10,370 bytes)

16. [RFI] BPL & Digital BC (AM) Radio (score: 1)
Date: Thu, 25 Mar 2004 16:08:10 +0000
On Thu, 25 Mar 2004 00:59:34 -0800 "Michael Tope" <> writes: I would think that sparking hardware, bad connections, etc etc and the resulting power line broadband RFI that we all love
/archives//html/RFI/2004-03/msg00117.html (7,017 bytes)

17. Re: [RFI] DFing power line noise (score: 1)
Author: "Missouri Guy, N0TT" <>
Date: Tue, 20 Jul 2004 03:43:38 +0000
That's typical for my local utility...they usually drive to my QTH, then we convoy it out to the noisy pole and troubleshoot. They seem to like to hear the noise and get instant feedback for the tro
/archives//html/RFI/2004-07/msg00142.html (9,214 bytes)

18. Re: [RFI] Pin Arcing (score: 1)
Author: "Missouri Guy, N0TT" <>
Date: Tue, 20 Jul 2004 03:27:16 +0000
I've tried that, but the power company servicing my area wants an approximate address instead. A "surveyor's ribbon" tied around a pole might help them zero in on the problem. 73, Charlie N0TT _____
/archives//html/RFI/2004-07/msg00143.html (7,965 bytes)

19. Re: [RFI] RFI to intercom (score: 1)
Author: "Missouri Guy, N0TT" <>
Date: Sun, 22 Aug 2004 01:05:46 +0000
Van, Temporarily disconnecting cables to a few of the stations may help isolate some cables that could be resonant to 20m. I would suggest bypassing the speaker leads right where they enter the chass
/archives//html/RFI/2004-08/msg00044.html (8,346 bytes)

20. Re: [RFI] Help with noise (score: 1)
Author: "Missouri Guy, N0TT" <>
Date: Mon, 22 Nov 2004 01:47:28 +0000
All the RDFers I know use a step attenuator between the receiver and antenna. As you get closer to the RFI source, switch in more antennuation to "knock down" the signal to a low level. Doing that w
/archives//html/RFI/2004-11/msg00061.html (7,072 bytes)

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