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Total 103 documents matching your query.

61. [RFI] From Topband- Warbling Noise around 3513 khz.???? Opinions sought. (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sun, 31 Aug 2014 12:48:59 -0400
I have the same type noise here, mine reads 3513.3 warbles, at times sounds a little unstable, its on the antenna for sure, I have all underground utilities no close neighbors and nothing on in the h
/archives//html/RFI/2014-08/msg00038.html (7,729 bytes)

62. Re: [RFI] Takes too long for my postings to clear the admin - 73 and Good Bye from Bill - WD8ARZ (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Wed, 24 Sep 2014 07:23:59 -0400
Hello Bill You are not moderated on this list. We see your posts fine. I am happy to work with you on your email problems. Please ask for help and I will work with you. There are over 1000 on this li
/archives//html/RFI/2014-09/msg00064.html (14,433 bytes)

63. Re: [RFI] Takes too long for my postings to clear the admin - 73 and Good Bye from Bill - WD8ARZ (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 25 Sep 2014 10:21:16 -0400
Bud: Thanks for your message. We (the RFI reflector) see all the posts that are posted properly. I am sure of that. Please don't forget that there are lots of moving parts in reflector posts. It's no
/archives//html/RFI/2014-09/msg00070.html (17,475 bytes)

64. [RFI] Noise Cancelling demo from WB6DJI (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Wed, 4 Feb 2015 20:18:21 -0500
I received this email tonight and thought it might be of interest to those of you with RX noise troubles. Operation video as posted on YouTube. 73, Tim K3LR @ DX Engineering _________________________
/archives//html/RFI/2015-02/msg00005.html (8,017 bytes)

65. [RFI] RFI Investigator needed (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 23 Apr 2015 16:53:49 -0400
I am searching for a professional RFI investigator/engineer. Must have experience finding and solving all types of RFI. Possible RFI expert consulting arrangement or full-time employment. Please resp
/archives//html/RFI/2015-04/msg00007.html (6,599 bytes)

66. Re: [RFI] RF into home alarm system (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sun, 18 Oct 2015 21:46:47 -0400
Hello Mike: I know you may not want to hear this - but with a WIRED system and your antennas close at 1.5 KW - you are asking for trouble - that wired system is a huge antenna. Wireless detectors are
/archives//html/RFI/2015-10/msg00045.html (8,961 bytes)

67. Re: [RFI] Blower noise from Carrier Furnace (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Wed, 27 Jan 2016 22:41:52 -0500
Hello Jim: I had a new HVAC system installed last year - It is the American Standard brand. I had bad RFI on 20 meters. I found this document: http://www.crompton.com/hamradio/Trane%20XV95%20RFI%20Do
/archives//html/RFI/2016-01/msg00082.html (8,404 bytes)

68. [RFI] RFI Tech Job - in eastern Ohio (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 3 May 2016 15:48:14 -0400
Nice RFI investigation position in NE Ohio http://jobview.monster.com/GetJob.aspx?JobID=166889423 73 Tim K3LR _______________________________________________ RFI mailing list RFI@contesting.com http:
/archives//html/RFI/2016-05/msg00006.html (6,586 bytes)

69. Re: [RFI] weird noise "waves" 60 khz Apaert (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 20 Sep 2016 21:21:36 -0400
This is classic switching power supply RFI. Inspect the RFI archives. Switching power supplies are used in 100s of devices. Everything from iPhone chargers, to wall warts, etc. Have you turned off yo
/archives//html/RFI/2016-09/msg00021.html (9,001 bytes)

70. [RFI] RFI from CATV line amps? (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sun, 13 Nov 2016 15:42:15 -0500
Has anyone ever encountered broad bad RFI from a CATV trunk line amp? Suspect is 10 feet off a power pole (mid span) - with three quarter inch CATV hardline connections. RFI occurs "some days from 10
/archives//html/RFI/2016-11/msg00031.html (6,713 bytes)

71. Re: [RFI] RFI from CATV line amps? (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Mon, 14 Nov 2016 22:41:42 -0500
Hello Mike and MANY others from RFI: Thanks for your help and offering your experience. The cable company will be out tomorrow night to replace the AMP and check the connectors. Hopeful that this wil
/archives//html/RFI/2016-11/msg00037.html (9,730 bytes)

72. Re: [RFI] Fwd: Henry Ott Consultants Spring 2017 Electromagnetic Compatibility Engineering Public Course (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Mon, 6 Feb 2017 18:51:43 -0500
Hi Jim Thanks for posting Sure wish his 3 day program was not at the same time as the Dayton Hamvention! 73 Tim K3LR This is an excellent tutorial covering most phases of EMC. I took this class about
/archives//html/RFI/2017-02/msg00010.html (13,002 bytes)

73. Re: [RFI] Visalia RFI Talk (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sat, 15 Apr 2017 20:29:08 -0400
Thanks for posting Jim I will rearrange my travel to attend your session at Visalia this coming Friday AM. 73 Tim K3LR I'm scheduled to give a talk on Friday at the Visalia DX Convention about Findin
/archives//html/RFI/2017-04/msg00013.html (7,802 bytes)

74. [RFI] was OTHR - 75 meter BUZZ yesterday from central PA (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Mon, 10 Dec 2018 13:57:32 -0500
  Take a look at the posts here:   https://forums.qrz.com/index.php?threads/75m-phone-wide-interference-jamming .637950/page-5   Scroll to the last page ? they used webSDRs to find it.   It is fixed
/archives//html/RFI/2018-12/msg00044.html (7,508 bytes)

75. [TowerTalk] ISO-PLUS now available (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 19 Feb 2019 14:09:52 -0500
Several guys on here have asked when this would be available. It is now ready: https://www.dxengineering.com/parts/dxe-iso-plus-2 73 Tim K3LR _______________________________________________ _________
/archives//html/RFI/2019-02/msg00046.html (7,291 bytes)

76. Re: [RFI] AT & T UVerse (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Mon, 14 Oct 2019 22:35:19 -0400
HI Mike: Go to one of the many AT&T cell site locations - find the number on the fence to call in case of emergency. Call that number - they will route you. Go to an AT&T store. Ask for the manager.
/archives//html/RFI/2019-10/msg00022.html (7,545 bytes)

77. Re: [RFI] Spectrum Cable Boxes (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sun, 10 Nov 2019 22:26:51 -0500
I have Spectrum cable modem and cable TV boxes here at K3LR. All use the Astron RS-4A linear power supplies https://www.dxengineering.com/parts/asr-rs-4a No RFI problems at all 73 Tim K3LR get a smal
/archives//html/RFI/2019-11/msg00027.html (14,709 bytes)

78. Re: [RFI] Dimmer Switch (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Mon, 9 Dec 2019 23:19:59 -0500
In my experience, neighbor houses with dimmers plus LED bulbs = significant RFI possibilities. Any ham who has LED lights or dimmers in their home must be diligent of significant RFI possibilities. T
/archives//html/RFI/2019-12/msg00048.html (9,577 bytes)

79. Re: [Amps] Amp causing RFI (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 4 Feb 2020 22:20:54 -0500
Hello Mark: What you are doing (and suggesting others do) with the AC ground to break it is not right. It violates the NEC code and is very unsafe. Please refer to the NEC. What is posted here on the
/archives//html/RFI/2020-02/msg00016.html (10,553 bytes)

80. Re: [RFI] Quick favor (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Mon, 10 Aug 2020 12:43:56 -0400
That is SPAM - do not respond. 73 Tim K3LR Mod or Owner.......... ?????????????? Spam?? Joe - W7RKN --Original Message-- From: RFI [mailto:rfi-bounces+w7rkn.7=gmail.com@contesting.com] On Behalf Of R
/archives//html/RFI/2020-08/msg00007.html (7,979 bytes)

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