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Total 93 documents matching your query.

1. [RFI] RFI Direction Finding (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 17 Feb 2006 15:40:03 -0500
I am looking for a handheld DF unit capable of reasonable directivity on 40M. I have excessive (+10 dB/S9) power line noise centered near 7 MHz but the noise is not very detectable at VHF/UHF. I real
/archives//html/RFI/2006-02/msg00003.html (7,000 bytes)

2. Re: [RFI] Washer RFI/EMI (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 1 Jun 2006 20:25:14 -0400
I have +40 dB/S9 noise on 75M from a new GE Harmony Washer and can be heard all the way up through 20M. The dryer appears to emit no RFI/EMI. Is there a common cure among the newer generation of was
/archives//html/RFI/2006-06/msg00000.html (6,093 bytes)

3. Re: [RFI] Towers/Antennas Near 138kV Transmission Lines (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 14 Aug 2006 19:50:37 -0400
Yes, they really detest taking down the main distribution system for maintenance. I live 700' from a series of three separate and parallel 230KV feeders from the Jacksonville Electric Authority. The
/archives//html/RFI/2006-08/msg00044.html (9,645 bytes)

4. Re: [RFI] Identify this pole hardware (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 30 May 2007 13:55:57 -0400
poles around my house are? I suspect that one of them is a source of RFI..." These appear to be an old style of telco splice enclosure and they should be purely passive. The CATV line appears above
/archives//html/RFI/2007-05/msg00072.html (8,330 bytes)

5. Re: [RFI] Wired vs Wireless Routers for RFI (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 11 Jan 2008 10:55:40 -0500
Jim, I continue to battle the same problems here. I have a business-class Cisco router without about a dozen unshielded CAT-5 cables connected to various PCs and devices around the house. I just pur
/archives//html/RFI/2008-01/msg00026.html (8,662 bytes)

6. Re: [RFI] AC Line filters- Direct-Drive Washers (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 4 Apr 2008 10:04:20 -0400
For the past year, I have been fighting an issue with my own GE Harmony direct-drive clothes washer. It's a great clothes washer, complete with serial I/O port to the dryer and a touch-screen display
/archives//html/RFI/2008-04/msg00016.html (9,765 bytes)

7. Re: [RFI] AC Line filters- Direct-Drive Washers (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 4 Apr 2008 10:30:31 -0400
My XYL would not part with the washer after using it the first time. Her happiness trumps mine. Paul, W9AC _______________________________________________ RFI mailing list RFI@contesting.com http://
/archives//html/RFI/2008-04/msg00018.html (8,109 bytes)

8. Re: [RFI] Computer RFI on 160 (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 29 Oct 2008 16:31:36 -0400
Bill, I routinely change out or replace chassis IEC connectors with the CORCOM 6EF1. Cost of the EMI filter is generally a function of the number of sections. One item to note is that many manufactu
/archives//html/RFI/2008-10/msg00080.html (8,281 bytes)

9. [RFI] Line Noise Spectragraph (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 19 Nov 2008 14:53:52 -0500
Once again, I am at my wits-end. Just when I got the utility company to clean up a four-year noise issue, I now have this. Please see the linked spectrograph below. http://216.229.20.37/images/W9AC-L
/archives//html/RFI/2008-11/msg00036.html (7,641 bytes)

10. Re: [RFI] Line noise (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 20 Nov 2008 17:18:07 -0500
Especially if you live in a deed-restricted, gated community (that would be me), and my antenna should not be there in the first place. Diplomacy wins out most of the time. Thanks to all for the sug
/archives//html/RFI/2008-11/msg00041.html (7,086 bytes)

11. [RFI] Nasty RFI wiping out higher bands (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 16 Dec 2008 03:11:13 -0500
I posted this reply on QRP-L this morning. I thought it would be equally relevant here on this list.: It's a tough pill to swallow, but pursuant to current Part 15 Rules, the Commission was correct b
/archives//html/RFI/2008-12/msg00028.html (9,731 bytes)

12. Re: [RFI] Nasty RFI wiping out higher bands (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 16 Dec 2008 08:28:12 -0500
Sec. 15.103(d) reads as follows: "(d) A digital device utilized exclusively in an appliance, e.g., microwave oven, dishwasher, clothes dryer, air conditioner (central or window), etc." What exactly
/archives//html/RFI/2008-12/msg00032.html (8,648 bytes)

13. Re: [RFI] Nasty RFI wiping out higher bands (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 16 Dec 2008 09:43:05 -0500
Roger, The problem is that the rule is specifically codified to cover all washers as appliances and under the current rules, are not subject to case law interpretation -- unless there's been a case
/archives//html/RFI/2008-12/msg00036.html (9,428 bytes)

14. Re: [RFI] DirecTV to ground or not to ground (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 21 Dec 2008 13:46:42 -0500
Receive communications equipment and antenna grounding is covered in NEC Sec. 810. In fact, few licensed amateurs realize that the NEC has a sub-section devoted to amateur radio station operations/g
/archives//html/RFI/2008-12/msg00059.html (8,214 bytes)

15. Re: [RFI] DirecTV to ground or not to ground (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 21 Dec 2008 15:41:27 -0500
It may be related to both mechanical and electrical safety concerns since the NEC (Sec. 810) dictates wire size irrespective of RF power level -- and that the specified gauges are adequate for maxim
/archives//html/RFI/2008-12/msg00061.html (7,674 bytes)

16. [RFI] Arc Fault Circuit Interrupt (AFCI) Breaker (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 5 Jan 2009 13:16:29 -0500
If anyone has direct experience with EMI caused by an AFCI breaker, please respond off-list. Thanks. Paul, W9AC _______________________________________________ RFI mailing list RFI@contesting.com htt
/archives//html/RFI/2009-01/msg00025.html (7,658 bytes)

17. [RFI] Fair Rite #31 Mix Material (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 11 Jan 2009 21:01:39 -0500
I am looking for small toroid cores in a #31 mix to construct my own bifilar-wound CM chokes for audio RFI abatement applications. From what I glean on the Fair-Rite website, #31 material is only ava
/archives//html/RFI/2009-01/msg00066.html (7,374 bytes)

18. Re: [RFI] Fair Rite #31 Mix Material (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 11 Jan 2009 22:15:41 -0500
But not in small, flat donut cores, according to the Fair-Rite on-line catalog. Fair-Rite appears to manufacture only clamp-on cores, elongated cores, and large flat donut cores in #31 material. Ide
/archives//html/RFI/2009-01/msg00071.html (8,696 bytes)

19. Re: [RFI] Fair Rite #31 Mix Material (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 11 Jan 2009 22:20:27 -0500
Jim and all... What I am looking for is a small donut core from Fair-Rite, something akin to the size of an Amidon FT-50 core. I'll admit that maybe it's me, but I cannot find any #31 material from F
/archives//html/RFI/2009-01/msg00072.html (12,409 bytes)

20. Re: [RFI] Fair Rite #31 Mix Material (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 11 Jan 2009 22:45:43 -0500
The closest core size I can find in #31 material is the Fair-Rite P/N 2631480102. That's a half-inch in diamter, but it's also a whopping half-inch in depth. So the thickness of the toroid core is th
/archives//html/RFI/2009-01/msg00075.html (8,535 bytes)

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