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161. Re: [RFI] RFI Analysis Please (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Fri, 28 Jan 2011 09:24:42 -0500; Mike Gruber is working on getting the Sounds of RFI page back up on our web site. 73, Ed Hare, W1RFI ARRL Laboratory Manager 225 Main St Newington, CT 06111 Tel: 860-594-0318 Email: W1RFI@arrl.org __; /archives//html/RFI/2011-01/msg00226.html (9,770 bytes)
162. Re: [RFI] Interference from AC units (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Thu, 8 Sep 2011 09:26:00 -0400; I'd imagine that if an FT-240 size core was used, that large core was selected to use multiple turns of wire. I would hope so, anyway. :-) 73, Ed Hare, W1RFI ARRL Laboratory Manager 225 Main St Newin; /archives//html/RFI/2011-09/msg00024.html (8,154 bytes)
163. Re: [RFI] UPDATE: New annoying noise just started (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Thu, 8 Sep 2011 09:40:09 -0400; You are making an assumption that is probably not true, Jim. Although ARRL has hired (almost pro bono, by consultant rates) people to go out and do some power-line work, such as the consultant whose; /archives//html/RFI/2011-09/msg00026.html (12,148 bytes)
164. Re: [RFI] RFI to and from adjacent cell site (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Thu, 8 Sep 2011 09:44:14 -0400; "Birdies" that are sometimes reported on HF from these things are not a function of the cellular-telephone transmitter. They would be a function of the digital control circuitry and/or computers that; /archives//html/RFI/2011-09/msg00027.html (11,808 bytes)
165. Re: [RFI] RFI publications (Magazines)? (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Thu, 8 Sep 2011 09:45:19 -0400; Hams with suspected power line noise may want to read: http://www.arrl.org/power-line Suggestions to improve the page are most welcome. But please post them to the RFI-General discussions forum on th; /archives//html/RFI/2011-09/msg00028.html (11,206 bytes)
166. Re: [RFI] UPDATE: New annoying noise just started (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Thu, 8 Sep 2011 09:54:38 -0400; Actually, as it turns out, it's probably me who was making an assumption not true. :-) I didn't realize that Jim had moved to California, so it would have been another consultant that was involved, a; /archives//html/RFI/2011-09/msg00030.html (13,081 bytes)
167. Re: [RFI] 2nd try - URL for the W8WWV RFI writeup (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 4 Apr 2012 04:01:34 -0400; I run into this issue all the time on every list I am on, and I've learned the hard way that it's just easier to create a shorter URL that won't truncate. Try: http://tinyurl.com/6u3j2pl 73, Ed Hare,; /archives//html/RFI/2012-04/msg00000.html (8,733 bytes)
168. Re: [RFI] 15 meter RFI problem - Super documentation (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 4 Apr 2012 04:07:59 -0400; Based on that report, the signal levels involved and the distances, I have little doubt that the device is operating WAY above the emissions limits for this sort of device. It appears to be a carrier; /archives//html/RFI/2012-04/msg00001.html (9,406 bytes)
169. Re: [RFI] 15 meter RFI problem - Super documentation (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 4 Apr 2012 04:18:47 -0400; I just ordered one and will report our findings here. My personal favorite page from their web site: http://store.secureviewvideo.com/catalog/consumer_alert.php 73, Ed Hare, W1RFI ARRL Laboratory Man; /archives//html/RFI/2012-04/msg00002.html (9,885 bytes)
170. Re: [RFI] 15 meter RFI problem - Super documentation (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Fri, 6 Apr 2012 19:34:10 -0400; Actually, I probably shouldn't have responded to a 2008 post at all. :-) I had moved all of my RFI@contesting.com email to an archive folder and accidentally left 4 of them behind. When I went back t; /archives//html/RFI/2012-04/msg00010.html (15,756 bytes)
171. Re: [RFI] TI - Power Line Communications? (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 23 Oct 2013 22:15:12 +0000; This PLC technology operates below 490 kHz. ARRL did testing of the Maxim PLC chipsets and found that over in-premise power line at W1AW, the chipsets operated very well at radidated levels that were; /archives//html/RFI/2013-10/msg00021.html (8,585 bytes)
172. Re: [RFI] TI - Power Line Communications? (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Thu, 24 Oct 2013 19:57:19 +0000; I'd think that the spectral purity of the signal is no more dependent on component aging than any other technology. Modern capacitors, for example, tend not to change value much with time. They can f; /archives//html/RFI/2013-10/msg00025.html (9,619 bytes)
173. Re: [RFI] ARRL to FCC... (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Tue, 25 Mar 2014 18:04:47 +0000; If the ARRL Lab can get some reports involving specific model numbers, we can do some testing and find out where these plasma sets stand. I had a report in MD that involved two Samsung plasma TVs. On; /archives//html/RFI/2014-03/msg00167.html (10,337 bytes)
174. Re: [RFI] ARRL to FCC... (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Tue, 25 Mar 2014 18:31:27 +0000; Thanks, Dale. We can then see if the TV is still in production. If it is no longer manufacturered, it may be a harmful interference complaint, not a possible emissions-limit violation. The ARRL Lab w; /archives//html/RFI/2014-03/msg00171.html (11,923 bytes)
175. Re: [RFI] ARRL to FCC... (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Tue, 25 Mar 2014 19:56:22 +0000; Hi, Jim, What I am suspecting is that we may need to install the following filters: Differntial-mode AC filter Common-mode choke on AC mains Common-mode choke on incoming coaxial cable Common-mode ch; /archives//html/RFI/2014-03/msg00176.html (11,172 bytes)
176. Re: [RFI] ARRL to FCC... (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Tue, 25 Mar 2014 20:04:41 +0000; Dale, The ARRL Lab can also buy a "brute-force" filter for you to try, as these can be pretty pricey. We had the complainant in MD willing to try, but his neighbor stopped cooperating, then the ham m; /archives//html/RFI/2014-03/msg00178.html (11,731 bytes)
177. Re: [RFI] ARRL to FCC... (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 26 Mar 2014 19:29:06 +0000; One report I received back indicated that one plasma TV was cured with common-mode chokes, but two other models were not. All were Samsung products. Tom, I'd love to do a lot of stuff with their tv,; /archives//html/RFI/2014-03/msg00203.html (20,294 bytes)
178. Re: [RFI] Grow-light.. (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Fri, 28 Mar 2014 10:19:49 +0000; The growers also don't want people to know what they are growing because some of them would want to steal their crops. An identifiable noise signature is a dead giveaway. ____________________________; /archives//html/RFI/2014-03/msg00239.html (10,301 bytes)
179. Re: [RFI] Grow-light.. (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Fri, 28 Mar 2014 19:48:33 +0000; The ones we have tested (3 so far...) were well above the FCC limits in the AM broadcast band, so you can even show this to a farmer, if you feel comfortable doing so. Ed Does the noise interfere wit; /archives//html/RFI/2014-03/msg00260.html (13,180 bytes)
180. Re: [RFI] ARRL to FCC... (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Sun, 30 Mar 2014 01:40:12 +0000; The unit we tested had the FCC logo on it, even though it was 58 dB over the noise limits. It also has a CE mark on it, and there are already complaints being brought in Europe. Under the US rules, t; /archives//html/RFI/2014-03/msg00290.html (11,538 bytes)

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