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Total 92 documents matching your query.

21. Re: [RFI] [Bulk] Re: [Bulk] Re: Electric Fence pulsing (will get worse soon !) (score: 1)
Author: "J. Gordon Beattie, Jr., W2TTT" <W2TTT@ATT.NET>
Date: Thu, 30 Jul 2015 17:00:35 -0500
Mike, If you or someone else nearby has a Kenwood TH-F6A to use in its SSB or AM mode, you will be able to tune a broad range from MF to about 1,300 MHz. I've used mine to hunt things in the past. 73
/archives//html/RFI/2015-07/msg00137.html (18,869 bytes)

22. Re: [RFI] Wiring practices to minimize emissions (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Tue, 12 Jul 2016 11:13:32 -0700
Jim, et al, Breaking DC paths with optical interfaces reduces inductive and radiated emissions. Further, twisted pairs are good, shielded twisted pairs properly bonded and grounded are better. Vy 73,
/archives//html/RFI/2016-07/msg00032.html (10,845 bytes)

23. Re: [RFI] Wiring practices to minimize emissions (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Tue, 12 Jul 2016 11:08:33 -0700
Don, VFD cable is a great suggestuon, but it needs to be installed correctly and checked.  Further, the maintenance processes need to call out their use and proper installation to ensure that the ben
/archives//html/RFI/2016-07/msg00033.html (13,171 bytes)

24. Re: [RFI] Wiring practices to minimize emissions (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Tue, 12 Jul 2016 11:00:57 -0700
Scott, A couple of key points to consider for the benefit of both the public and the city: 1. Noise from large industrial or commercial equipment can be as tough to predict and mitigate as consumer d
/archives//html/RFI/2016-07/msg00034.html (11,343 bytes)

25. Re: [RFI] Air Gig? (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Wed, 21 Sep 2016 16:27:44 -0700
Gary et al, I don't  think you will have any issues with this technology. I am familiar with its technology and under a strict NDA, so this is all I can say on the subject. 73, Gordon Beattie, W2TTT
/archives//html/RFI/2016-09/msg00028.html (8,699 bytes)

26. Re: [RFI] Noise - where do I start? (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Sun, 25 Sep 2016 06:24:02 -0700
Tom, If you can, and if you suspect an interview home source, put your rig on battery and cut power to the house. It is always good to clear up in house stuff first unless you have a specific issue t
/archives//html/RFI/2016-09/msg00043.html (8,633 bytes)

27. Re: [RFI] Noise - where do I start? (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Sun, 25 Sep 2016 06:42:27 -0700
Tom, Needed more coffee... Saw the video.   Do your neighbors have new solar panels? Inverters on the panels could be in play.  Does it quiet down after dusk? Try taking a portable radio for a walk.
/archives//html/RFI/2016-09/msg00044.html (8,251 bytes)

28. Re: [RFI] Noise - where do I start? (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Sun, 25 Sep 2016 07:06:10 -0700
Tom, I feel your pain.  It is precious time and really annoying when deprecated by noise. Please keep us informed and we'll try to help. 73, Gordon Beattie, W2TTT 201.314.6964 Sent from AT&T Mail on
/archives//html/RFI/2016-09/msg00048.html (10,097 bytes)

29. Re: [RFI] Noise - where do I start? (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Sun, 25 Sep 2016 07:08:29 -0700
Michael, Likely, but from what? Hunting opportunity. 73, Gordon Beattie, W2TTT 201.314.6964 Sent from AT&T Mail on Android From:"Michael C Martin" <mike@rfiservices.com> Date:Sun, Sep 25, 2016 at 10:
/archives//html/RFI/2016-09/msg00049.html (11,393 bytes)

30. Re: [RFI] Smoothfitness 6.25 Treadmill RFI (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Sun, 25 Sep 2016 07:17:57 -0700
Bill, Treadmills are notoriously noisy and impact all sorts of services from radio and TV to xDSL.  Really tough to get a reasonable solution in place because the users don't correlate their device u
/archives//html/RFI/2016-09/msg00050.html (9,332 bytes)

31. Re: [RFI] Smoothfitness 6.25 Treadmill RFI (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Sun, 25 Sep 2016 08:36:44 -0700
Lionel, Great solution, but if it is not your treadmill and it is radiating next door or down the block, you'll need the manufacturer or dealer to step up with the cooperation of your neighbor. Those
/archives//html/RFI/2016-09/msg00052.html (11,787 bytes)

32. Re: [RFI] Noise - where do I start? (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Mon, 26 Sep 2016 03:57:03 -0700
Ed, Bravo!   That is why I started with the recommendation that you cut the power to your own house first and run your radio on a battery as you bring up circuits one at a time to take measurements.
/archives//html/RFI/2016-09/msg00068.html (12,862 bytes)

33. Re: [RFI] Regular birdies (score: 1)
Author: "James Gordon Beattie, Jr." <w2ttt@att.net>
Date: Wed, 28 Sep 2016 16:00:37 -0700
4.3125 kHz. :-) 73, Gordon, W2TTT Sent from AT&T Mail on Android See if they are 4 khz apart on160 -- if so I bet they are ADSL carriers from your friendly teleco . They are clean carriers - and the
/archives//html/RFI/2016-09/msg00104.html (8,964 bytes)

34. Re: [RFI] FIOS vs DSL (score: 1)
Author: w2ttt@att.net
Date: Thu, 23 Feb 2017 22:00:59 +0000 (UTC)
ONT power supplies are really noisy Get Outlook for Android As others said, FiOS is a Verizon trademark for what used to be called Fiber To the Premises (FTTP). The way it works is similar to Hybrid
/archives//html/RFI/2017-02/msg00060.html (11,681 bytes)

35. Re: [RFI] 4khz Spectrum comb ADSL2 one last try composed as text (score: 1)
Author: "J. Gordon Beattie, Jr." <w2ttt@att.net>
Date: Thu, 2 Mar 2017 13:37:05 -0500
Hank, xDSL subcarriers are every 4.3125 kHz. That is a common industry standard. You will probably see carriers between 138 kHz and about 8.5 MHz, though you could see them up to 17 MHz if the carrie
/archives//html/RFI/2017-03/msg00015.html (12,220 bytes)

36. Re: [RFI] 4khz Spectrum comb ADSL2 one last try composed as text (score: 1)
Author: w2ttt@att.net
Date: Fri, 3 Mar 2017 01:42:39 +0000 (UTC)
Hmmm...we'll it is m interesting that Clink had the approach to increase subcarrier power in the face of interference.  That approach is not what I've seen in other DSL systems.  Glad to see that the
/archives//html/RFI/2017-03/msg00018.html (16,514 bytes)

37. Re: [RFI] Deep concern over Radio Spectrum | Southgate Amateur Radio News (score: 1)
Author: w2ttt@att.net
Date: Wed, 19 Jul 2017 04:04:07 +0000 (UTC)
Tony et al, Thank you for forwarding this important and concise statement on the state and implications of RFI.  The KEY element will be to explain to industry, government and citizens organizations
/archives//html/RFI/2017-07/msg00044.html (10,382 bytes)

38. Re: [RFI] Deep concern over Radio Spectrum | Southgate Amateur Radio News (score: 1)
Author: w2ttt@att.net
Date: Wed, 19 Jul 2017 13:37:02 +0000 (UTC)
Roger, Ditto! 73, Gordon Beattie, W2TTT 201.314.6964 Get Outlook for Android On Wed, Jul 19, 2017 at 7:13 AM -0400, "Roger (K8RI)" <k8ri@rogerhalstead.com> wrote: I retired as a computer systems proj
/archives//html/RFI/2017-07/msg00047.html (10,758 bytes)

39. Re: [RFI] Deep concern over Radio Spectrum | Southgate Amateur Radio News (score: 1)
Author: w2ttt@att.net
Date: Wed, 19 Jul 2017 13:43:03 +0000 (UTC)
Kurt, Alas my friend it is not easy to identify, quantify, mitigate or communicate in terms that every element, person and team need to "buy-in".  So far I think Roger K8RI and I have summarized some
/archives//html/RFI/2017-07/msg00048.html (8,583 bytes)

40. Re: [RFI] ARLB025 FCC Seeks Comments on Technological Advisory Council Recommendations (score: 1)
Author: w2ttt <w2ttt@att.net>
Date: Wed, 06 Dec 2017 00:28:24 -0500
Gentlemen,1. There is no "big money" backing the ARRL.  We should be so lucky as to be rolling in a bounty of money from such a commercially attractive enterprise, even as a non-profit hobby and serv
/archives//html/RFI/2017-12/msg00029.html (11,566 bytes)


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