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Total 99 documents matching your query.

21. Re: [RFI] Noise cancellers.... (score: 1)
Author: donovanf@starpower.net
Date: Sun, 23 Mar 2014 12:32:00 -0400 (EDT)
Pat, Dave and Dale, Small bidirectional loop antennas such as the Pixel "magnetic" loop are very effective at placing a deep null on a single vertically polarized, ground wave propagated RFI source.
/archives//html/RFI/2014-03/msg00139.html (11,759 bytes)

22. Re: [RFI] RFI (score: 1)
Author: donovanf@starpower.net
Date: Tue, 25 Mar 2014 16:59:30 -0400 (EDT)
Mike Martin is one of the most capable RFI investigators you could ever hope for. What did he tell you about the RFI source? 73 Frank W3LPL -- Original Message -- I posted this once before. The stati
/archives//html/RFI/2014-03/msg00181.html (7,799 bytes)

23. Re: [RFI] Thumper & not the rabbit (score: 1)
Author: donovanf@starpower.net
Date: Sun, 30 Mar 2014 12:02:36 -0400 (EDT)
Hi Gary, Can you share the results of the RF Exposure evaluation you are required to perform by the FCC regulations affecting your license? Your description of your antenna placement and your earlier
/archives//html/RFI/2014-03/msg00305.html (10,866 bytes)

24. [RFI] Fwd: Re: broadcasting interference (score: 1)
Author: donovanf@starpower.net
Date: Sun, 13 Apr 2014 23:34:10 -0400 (EDT)
Hi Jorge, Its best to ask a few other hams to run the same test at their QTHs. You could be experiencing 10 kHz-spaced intermod products, if thats the case they shouldn't show up at other QTHs. They
/archives//html/RFI/2014-04/msg00100.html (8,915 bytes)

25. [RFI] Pot Grower's Lights Interfering with Ham Radio Chats (score: 1)
Author: donovanf@starpower.net
Date: Fri, 6 Jun 2014 09:50:26 -0400 (EDT)
http://www.coloradoan.com/story/news/local/2014/06/05/pot-growers-lights-interfering-ham-radio-chats/10015757/ -- Original Message -- _______________________________________________ RFI mailing list
/archives//html/RFI/2014-06/msg00042.html (9,655 bytes)

26. Re: [RFI] Noisy transmitters...somewhat long... (score: 1)
Author: donovanf@starpower.net
Date: Tue, 23 Sep 2014 23:10:23 -0400 (EDT)
I have used all manner of transceivers in my multi-multi station over the last forty years. Including several each of the following: - Collins S-line - Drake C-line - Drake TR-7 - TS-830 - TS-930 - T
/archives//html/RFI/2014-09/msg00057.html (7,258 bytes)

27. Re: [RFI] RF getting into 4-port wireless router - progress (score: 1)
Author: donovanf@starpower.net
Date: Thu, 15 Jan 2015 12:58:52 -0500 (EST)
Hi Ken, Don't be fooled... Outlet testers can only reliably verify the wiring of the three wires connected each individual outlet, they cannot detect many other dangerous wiring errors commonly found
/archives//html/RFI/2015-01/msg00109.html (14,667 bytes)

28. Re: [RFI] w7ekb & ground rods (score: 1)
Author: donovanf@starpower.net
Date: Thu, 15 Jan 2015 20:35:03 -0500 (EST)
NEC quotes relevant to this discussion: Not less than two driven ground rods placed at a minimum of 6 feet apart when a non-metallic water piping system exists or is to be installed. A separate groun
/archives//html/RFI/2015-01/msg00128.html (10,094 bytes)

29. Re: [RFI] w7ekb & ground rods (score: 1)
Author: donovanf@starpower.net
Date: Fri, 16 Jan 2015 17:18:30 -0500 (EST)
Hi Ed, You're doing it right, the idea is to avoid galvanic corrosion. Galvanized ground rods should be used with galvanized towers and copper ground rods should be used with buildings, 73 Frank W3LP
/archives//html/RFI/2015-01/msg00138.html (11,042 bytes)

30. Re: [RFI] Noise on 15 (score: 1)
Author: donovanf@starpower.net
Date: Wed, 29 Apr 2015 14:33:11 -0400 (EDT)
Hi Larry, The 25 kHz bandwidth you heard is an over the horizon radar is in RAF Akrotiri, Cyprus. http://www.ominous-valve.com/Akrotiri130312.mp4 Fortunately it changes frequency regularly, its been
/archives//html/RFI/2015-04/msg00016.html (7,943 bytes)

31. Re: [RFI] Xfinity X1 (score: 1)
Author: donovanf@starpower.net
Date: Tue, 23 Jun 2015 16:04:54 -0400 (EDT)
Hi Tony, I'm lucky to have both Comcast Xfinity and FioS in my neighborhood. I had Comcast for many years. They have a great entertainment package but despite countless service calls over the years t
/archives//html/RFI/2015-06/msg00024.html (7,361 bytes)

32. Re: [RFI] Electric Fence pulsing (will get worse soon !) (score: 1)
Author: donovanf@starpower.net
Date: Wed, 22 Jul 2015 13:59:42 -0400 (EDT)
Hi Mike, A time domain reflectometer makes quick work of identifying the locations of faults in an electric fence. Maybe you can find a ham who will loan one to you. Properly installed its resistance
/archives//html/RFI/2015-07/msg00043.html (13,852 bytes)

33. Re: [RFI] [Bulk] Re: Electric Fence pulsing (will get worse soon !) (score: 1)
Author: donovanf@starpower.net
Date: Thu, 30 Jul 2015 13:41:31 -0400 (EDT)
Hi Mike, Many hand held and portable VHF/UHF ham band transceivers also have the aircraft band built in. Perhaps one of your friends had one. Many inexpensive aircraft receivers are also available on
/archives//html/RFI/2015-07/msg00123.html (16,348 bytes)

34. Re: [RFI] [Bulk] Re: Electric Fence pulsing (will get worse soon !) POLARIZATION (score: 1)
Author: donovanf@starpower.net
Date: Mon, 24 Aug 2015 21:08:11 -0400 (EDT)
Hi Mike, This is a good time to break out your antenna modelling software and give it a good workout. Almost all of the radiation from wires more than a wavelength long and installed a few hundredths
/archives//html/RFI/2015-08/msg00080.html (19,730 bytes)

35. [RFI] A Tale of a Successful 160 meter RFI Hunt (score: 1)
Author: donovanf@starpower.net
Date: Sun, 14 Feb 2016 18:32:40 -0500 (EST)
A few weeks ago I noticed a new source of intense broadband RFI had appeared on 160 meters and adjacent frequencies from approximately 1500-2000 kHz. There is no trace of RFI on any other frequencies
/archives//html/RFI/2016-02/msg00079.html (7,808 bytes)

36. Re: [RFI] A Tale of a Successful 160 meter RFI Hunt (score: 1)
Author: donovanf@starpower.net
Date: Sun, 14 Feb 2016 22:44:24 -0500 (EST)
Hi Jim, I forgot to mention that this TIS transmitter lost its audio feed about six months ago, apparently no one noticed! Its 1700 Hz carrier is strong and clear but no trace of audio. I've never he
/archives//html/RFI/2016-02/msg00082.html (9,127 bytes)

37. Re: [RFI] Topband: A Tale of a Successful 160 meter RFI Hunt (score: 1)
Author: donovanf@starpower.net
Date: Mon, 15 Feb 2016 19:33:40 -0500 (EST)
Hi Mike, We never needed to use the loopstick antenna in the PL-660 receiver. Because I had a very accurate bearing from my 350 foot diameter 8-circle receiving array, we simply used the PL-660 S-met
/archives//html/RFI/2016-02/msg00085.html (10,505 bytes)

38. Re: [RFI] Tecsun 660 (score: 1)
Author: donovanf@starpower.net
Date: Tue, 16 Feb 2016 10:18:13 -0500 (EST)
Hi Jeff, My consistent practice is to identify the highest frequency where I can hear the RFI in my shack. I then use my directive antennas to determine the bearing on which I should search. I can co
/archives//html/RFI/2016-02/msg00088.html (9,721 bytes)

39. Re: Topband: Tecsun 660 (score: 1)
Author: donovanf@starpower.net
Date: Tue, 16 Feb 2016 16:24:27 -0500 (EST)
Hi Stan, There are countless thousands of poles within five miles of my QTH, his method could not possibly work here. If I tried, I would lose my excellent reputation with my power company RFI crew.
/archives//html/RFI/2016-02/msg00091.html (12,613 bytes)

40. Re: [RFI] House Ground (score: 1)
Author: donovanf@starpower.net
Date: Wed, 16 Mar 2016 01:01:43 -0400 (EDT)
Hi Bill, That's not an uncommon error, and potentially a dangerous error in if a lightning strike that causes sparking. Google will help you find much information about grounding and bonding of gas p
/archives//html/RFI/2016-03/msg00046.html (12,912 bytes)


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