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321. Re: [RFI] Report on 12V 750W server supplies (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Fri, 5 Jun 2020 16:23:59 +0000; Allthough cranking the voltage past 13.8 volts probably won't damage anything, there is no guarantee to that, so just keep that n mind. Aslo, for something like server supply, this could well be a Cl; /archives//html/RFI/2020-06/msg00005.html (9,335 bytes)
322. Re: [RFI] Covering Solar Panels To Assess RFI (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 26 Aug 2020 13:27:57 +0000; I think that it is highly unlikely that the panels themselves are creating noise. Paul Cianciolo, W1VLF, has a Solar Edge system at his house. He had found the usual wiring, grounding and optimizer i; /archives//html/RFI/2020-08/msg00035.html (12,086 bytes)
323. Re: [RFI] Covering Solar Panels To Assess RFI (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 26 Aug 2020 16:11:41 +0000; Although it seems intuitive that escalating these problems to the FCC or other actions with legal implications will speed things up, just the opposite it true. Right now, we have good contact with So; /archives//html/RFI/2020-08/msg00037.html (15,577 bytes)
324. Re: [RFI] FM Wireless Mic on 144.160MHz (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Sun, 30 Aug 2020 14:41:16 +0000; It should be easy enough to look at the unit itself and see what frequency it uses. If it is not FCC certificated, then it could be high powered operating on any frequency. __________________________; /archives//html/RFI/2020-08/msg00063.html (10,985 bytes)
325. Re: [RFI] Covering Solar Panels To Assess RFI (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Sun, 30 Aug 2020 15:50:09 +0000; This could be misleading. In the unlikely event that the panels themselves are generating noise, disconnecting them from the optimizers would remove them from a large length of common-mode radiator.; /archives//html/RFI/2020-08/msg00064.html (11,497 bytes)
326. Re: [RFI] Covering Solar Panels To Assess RFI (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Mon, 31 Aug 2020 18:33:00 +0000; I am not sure that I would say that "Solar Edge" believes the panels are noisy. One engineer or installation technician may have said that, but I've never heard that from our high-level engineering c; /archives//html/RFI/2020-08/msg00068.html (9,935 bytes)
327. Re: [RFI] Soliciting Help From Certified RF Engineer (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 2 Sep 2020 14:45:43 +0000; You can do this, Tony, but it could be counterproductive. Under Part 15 rules, there are no specific emissions limits for radiated emissions for unintentional emitters below 30 MHz. All indications a; /archives//html/RFI/2020-09/msg00004.html (9,925 bytes)
328. Re: [RFI] Soliciting Help From Certified RF Engineer (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 2 Sep 2020 15:53:45 +0000; Yes, harmful interference is the basis on which the FCC Enforcement folks resolve almost all of the complaints it receives. If three is an emissions violation, that gets handled by the Office of Engi; /archives//html/RFI/2020-09/msg00006.html (15,318 bytes)
329. Re: [RFI] Soliciting Help From Certified RF Engineer (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Thu, 3 Sep 2020 13:47:48 +0000; Yes, but those measurements might convince Solar Edge that you do not have a problem, which is exactly what we don't want What I recommend we do is to first have W1VLF use a probe and SDR to measure; /archives//html/RFI/2020-09/msg00013.html (9,915 bytes)
330. Re: [RFI] 433.92 remote control, legal? (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Fri, 4 Sep 2020 13:53:51 +0000; Part 15 has a section on periodic radiates that permit relatively high power to be used for remote control, weather stations and some warehouse industrial equipment. Yes. it is used under Part 15. I; /archives//html/RFI/2020-09/msg00020.html (8,842 bytes)
331. Re: [RFI] Inverters? (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Mon, 21 Sep 2020 11:57:41 +0000; When QST reviewed generators a few years back, we noticed a wide range in the stability of the motor speed and thus voltage vs load. For some, when we keyed a kW amplifier, the motor speed remained p; /archives//html/RFI/2020-09/msg00068.html (13,346 bytes)
332. Re: [RFI] 2 MW Solar Farm (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Tue, 22 Sep 2020 11:50:21 +0000; It probably is true, Jim. The EU has limits that apply in more circumstances than in the US. For example, below 30 MHz, the only US limits are that which are conducted onto the AC mains. There are no; /archives//html/RFI/2020-09/msg00088.html (9,915 bytes)
333. Re: [RFI] 2 MW Solar Farm (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Tue, 22 Sep 2020 13:46:07 +0000; If any of you all have an HF mobile set up and can go to one of these farms, please do and provide a report. Date/Time: Location (GPS coordinates and/or street address. Describe location if necessary; /archives//html/RFI/2020-09/msg00090.html (12,509 bytes)
334. Re: [RFI] RFI - A Losing Battle (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Tue, 22 Sep 2020 19:39:21 +0000; Yes, we might all benefit from a new agency, but this is not going to happen, so we will continue to do the best we can. To really understand this problem, we need to look at Sec. 15.3 closely. Here; /archives//html/RFI/2020-09/msg00097.html (13,333 bytes)
335. Re: [RFI] A LOSING BATTLE (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Tue, 22 Sep 2020 23:38:28 +0000; Hi, Dave, A few amateurs have directly engaged the FCC. If they do so in a professional and respectful way, this really doesn't cause much harm, although over decades of time, ARRL staff have managed; /archives//html/RFI/2020-09/msg00110.html (13,159 bytes)
336. Re: [RFI] RFI - A Losing Battle (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Tue, 22 Sep 2020 23:58:34 +0000; Yeah, although we do get the FCC to do some enforcement anyway. What is needed is a campaign to identify aggregious devices and report them to the FCC. ARRL has filed a few complaints about illegal d; /archives//html/RFI/2020-09/msg00111.html (19,367 bytes)
337. Re: [RFI] RFI - A Losing Battle (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 23 Sep 2020 00:05:18 +0000; Yes, and in response to a related question about how to approach a neighbor, this can be the real stumbling block. First, that neighbor does not have our understanding of the RFI issues. To our neigh; /archives//html/RFI/2020-09/msg00112.html (11,049 bytes)
338. Re: [RFI] RFI - A Losing Battle (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 23 Sep 2020 14:40:13 +0000; We did have a good case against Home Depot, although for a number of reasons, this didn't get followed up. We also had a problem with a Walmart device, but they stopped selling it after stockout, as; /archives//html/RFI/2020-09/msg00121.html (22,783 bytes)
339. Re: [RFI] RFI - A Losing Battle (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 23 Sep 2020 14:42:06 +0000; Part of the problem is that "enforcement" of harmful interference is handled by the Enforcement Bureau, which we have working somewhat well. The emissions and marketing violations are enforced by the; /archives//html/RFI/2020-09/msg00122.html (22,688 bytes)
340. Re: [RFI] Solar Farm Mobil measurement (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 23 Sep 2020 14:44:13 +0000; That is great data, Mike, thanks. In this case, it doesnt even look like a ham located nearby would have harmful interference, although there may be some noise. This actually matches my own experienc; /archives//html/RFI/2020-09/msg00123.html (10,388 bytes)

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