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Total 86 documents matching your query.

41. Re: [RFI] Noise Cancelling demo from WB6DJI (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Thu, 5 Feb 2015 13:26:12 -0500
While I respect Mike's desire to work the rare DX and find a solution to his interference problem, has he contacted his local utility to get that noise source eliminated? It's possible I missed a thr
/archives//html/RFI/2015-02/msg00008.html (9,052 bytes)

42. [RFI] Fwd: Anyone ID the cause of this rain-initiated RFI? (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Fri, 3 Apr 2015 01:27:32 -0400
Yes, Mike, I am reading these notes. I read everything that comes across here. However, I deliberately choose not to get involved in the speculation game. It's a waste of time. Want to know what is c
/archives//html/RFI/2015-04/msg00006.html (13,377 bytes)

43. Re: [RFI] Test (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Fri, 1 May 2015 20:18:17 -0400
Buzz hum zap pffffft zzzzzzzzzz chirp swish mmmmmm snap crackle pop zzzzzzz pffffffft Is that comforting? I hear that every day! A day without RFI is like.....quiet. 73, _____________________________
/archives//html/RFI/2015-05/msg00004.html (7,501 bytes)

44. Re: [RFI] Lightning Arresters (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Sun, 24 May 2015 01:55:58 -0400
Jim: An Ultrasonic detector/receiver/whatever is not always going to sound off even though the pole being scanned is definitely the source of the interference. As Mike pointed out, there are many rea
/archives//html/RFI/2015-05/msg00033.html (10,839 bytes)

45. Re: [RFI] PC Speaker "Buzz" (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Tue, 30 Jun 2015 20:38:19 -0400
Try a .1 uF disc capacitor across the speaker leads at each end of the speaker wire. That's the cheapest way. Add ferrite as needed to add to the caps. Snap on Mix 31 ferrites with appropriate inner
/archives//html/RFI/2015-06/msg00037.html (8,493 bytes)

46. Re: [RFI] Other Noise Challenge For Ed! (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Wed, 29 Jul 2015 11:44:25 -0400
I am not an engineer. I do have many years of successful DFing experience locating a wide variety of interference sources. The method David used to locate his 7 MHz source in an area supplied by unde
/archives//html/RFI/2015-07/msg00109.html (18,180 bytes)

47. [RFI] What I use to find Interference Sources (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Thu, 30 Jul 2015 12:11:21 -0400
Over the years I've been contributing to the RFI email list, I have mentioned nearly every tool I use to locate interference sources. I do have a distinct advantage over the average ham because my em
/archives//html/RFI/2015-07/msg00119.html (14,285 bytes)

48. Re: [RFI] What I use to find Interference Sources (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Thu, 30 Jul 2015 16:02:00 -0400
David: The Radar Engineers receiver is optimized for pulse noise reception. The receiver features a small LCD "spectrum scope" that allows the operator to see the pattern of the interference signal.
/archives//html/RFI/2015-07/msg00132.html (11,195 bytes)

49. [RFI] Who calls the Utility??? (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Thu, 30 Jul 2015 16:17:02 -0400
Charlie: The electric utility gets calls from the general public mostly. That includes the Amateur Radio community. Calls also come from Television Cable System operators, the Telephone company, publ
/archives//html/RFI/2015-07/msg00133.html (8,955 bytes)

50. Re: [RFI] What I use to find Interference Sources (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Thu, 30 Jul 2015 17:10:56 -0400
Paul: Actually they don't rely on me to keep score. There are administrative types, certified in bean counting who manage the statistical performance of the collection of interference investigators w
/archives//html/RFI/2015-07/msg00138.html (14,287 bytes)

51. Re: [RFI] What I use to find Interference Sources (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Fri, 31 Jul 2015 09:16:38 -0400
My thanks to Ron for providing much more technical detail about the design and performance of the Radar Engineers receiver than I could provide. Inquiries concerning technical details about the Radar
/archives//html/RFI/2015-07/msg00149.html (8,996 bytes)

52. Re: [RFI] RFI With Smoke Detectors (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Mon, 17 Aug 2015 15:41:40 -0400
Stan: Does the interference to the smoke detectors occur at very low RF output...say 5 or 10 watts? Or does it occur only AT higher output levels. Can you get schematics for the smoke detectors? Have
/archives//html/RFI/2015-08/msg00044.html (7,283 bytes)

53. [RFI] Interesting Case of VHF RFI caused by Chilled Water Controller (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Wed, 2 Dec 2015 12:21:48 -0500
I recently investigated an interference problem to Amateur Radio VHF equipment installed at the county EOC. The interference was continuous and strong across the spectrum from approximately 120 MHz t
/archives//html/RFI/2015-12/msg00026.html (10,950 bytes)

54. [RFI] Using the SDRPlay receiver for RFI for searches (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Tue, 9 Feb 2016 09:06:45 -0500
Tom: What software are you using to operate the SDRPlay? I have used SDRSharp & HDSDR. I have used these mobile only. The receiver hears very well. HDSDR is stable but a bit challenging to use. SDRSh
/archives//html/RFI/2016-02/msg00044.html (10,261 bytes)

55. Re: [RFI] Topband: Tecsun 660 (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Tue, 8 Mar 2016 16:35:56 -0500
As a utility RFI Investigator, I am always polite when speaking with complainants. However, I typically ignore any specific pole references they provide. In my experience this information is 99% wron
/archives//html/RFI/2016-03/msg00007.html (8,360 bytes)

56. Re: [RFI] Topband: Tecsun 660 (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Sun, 13 Mar 2016 16:28:49 -0400
I made up a 6 foot piece of RG-58 with a 3.5 mm male on one end and BNC male on the other. This cable allows me to use the National RF HFDF active loop system with the 660. The same cable allows conn
/archives//html/RFI/2016-03/msg00021.html (10,919 bytes)

57. Re: [RFI] Tescun PL-660 Antenna (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Tue, 19 Apr 2016 17:26:15 -0400
John KK9A: To answer the questions you asked... 1. The choice of antenna is determined by the nature of the problem or, perhaps more accurately, the frequency band of the problem. You described your
/archives//html/RFI/2016-04/msg00049.html (12,047 bytes)

58. Re: [RFI] How far does RFI travel? (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Mon, 9 May 2016 11:50:01 -0400
There is no definitive answer to this question. In just a few replies, you can see that RFI can travel great distances. There are an infinite number of combinations all of which result in a widely va
/archives//html/RFI/2016-05/msg00040.html (8,194 bytes)

59. Re: [RFI] How far does RFI travel? (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Tue, 10 May 2016 13:48:11 -0400
While extreme, the last example should be adequate proof that there is no predicting how far RFI CAN or will travel. I categorize this question in the same manner I categorize questions about what a
/archives//html/RFI/2016-05/msg00047.html (9,076 bytes)

60. Re: [RFI] MFJ 5008 ultrasonic receiver (score: 1)
Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>
Date: Thu, 19 May 2016 12:19:27 -0400
The percentage of cases where my Radar Engineers Model 250 Ultrasonic Detector proves useful is very small. This kind of device is only useful for pinpointing a specific device on a pole. It offers l
/archives//html/RFI/2016-05/msg00071.html (9,476 bytes)

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