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Total 612 documents matching your query.

281. Re: [RFI] Galaxy Grow Light Ballast Update (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Wed, 3 Feb 2016 18:26:54 +0000
Yes, that's it, and I do have a set on order. If any of you have a cooperative neighbor, let me know and we can get you to try the filters. If they work, you can keep them. Most growers have more tha
/archives//html/RFI/2016-02/msg00025.html (18,433 bytes)

282. Re: [RFI] cops zero in on noisy grow light ballasts (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Wed, 3 Feb 2016 18:44:27 +0000
Good point, Gary, and I completely agree. Hams need to be extremely cautious when approaching neighbors over any RFI situation, especially any that may be doing indoor gardening. Some of these people
/archives//html/RFI/2016-02/msg00027.html (15,443 bytes)

283. Re: [RFI] Topband: Tecsun 660 (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Tue, 8 Mar 2016 21:19:47 +0000
I can't imagine this reliably working well. If noise gets onto long, overhead power lines, it will radiate for a long distance. The noise radiated by lines closer to the shack than the actual source
/archives//html/RFI/2016-03/msg00006.html (16,086 bytes)

284. Re: [RFI] MFJ 5008 ultrasonic receiver (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Mon, 23 May 2016 12:06:38 +0000
I agree, Mike. Ultrasonics give false positives on corona, and false negatives if something on the structure is blocking ultrasonic sound. I don't think that most hams need to use ultrasonic dishes.
/archives//html/RFI/2016-05/msg00080.html (14,063 bytes)

285. Re: [RFI] Light fixtures (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Wed, 29 Jun 2016 20:38:00 +0000
A list of "bad guys" could be effective, but Dave is right; a "good guy" today can be a bad guy tomorrow. Also, where do we draw the line? There is a major difference in kind between a ham that buys
/archives//html/RFI/2016-06/msg00088.html (9,428 bytes)

286. Re: [RFI] Yet another balun question (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Wed, 29 Jun 2016 20:43:28 +0000
Hi Paul, First, let's call a spade a spade -- it's not a "balun" or even a "current balun," it's a common mode choke. What we CALL it helps us understand what it is and what it does. See more commen
/archives//html/RFI/2016-06/msg00089.html (12,345 bytes)

287. Re: [RFI] Wot the heck!?!?!?!?!?! 40 meters, (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Thu, 30 Jun 2016 17:24:23 +0000
Can you provide a link we can use to describe this to people? Thanks. Ed Last I saw a couple years ago, you fill out an online complaint form with the FCC, the offender is "red-flagged" in the comput
/archives//html/RFI/2016-06/msg00102.html (10,164 bytes)

288. Re: [RFI] Light fixtures (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Fri, 1 Jul 2016 19:36:11 +0000
From antenna modeling I have done, the decay of noise with distance depends on how the noise is being coupled on to conductors and how imbalanced those conductors are. If noise is coupled onto wires
/archives//html/RFI/2016-07/msg00000.html (8,891 bytes)

289. Re: [RFI] Solar Panel RFI (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Tue, 9 Aug 2016 22:42:34 +0000
< Not everything in it is right, but most of it is.> I had a nasty (still unresolved) fight with a neighbor several years ago over his solar panels, batteries, and inverter system. I got the FCC invo
/archives//html/RFI/2016-08/msg00058.html (10,359 bytes)

290. Re: [RFI] Air Gig? (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Thu, 22 Sep 2016 12:02:38 +0000
This surfaced during the actual BPL days, with a company called Corridor Technology, if I recall the name correctly. It never really went anywhere. How this will work when the propagating wave hits t
/archives//html/RFI/2016-09/msg00034.html (13,417 bytes)

291. Re: [RFI] Noise - where do I start? (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Mon, 26 Sep 2016 07:29:27 +0000
<Does the searcher have an open mind?> I can't begin to say how important this is. ARRL staff hear all the time from hams about utility "investigations" in which the utility investigator did not set
/archives//html/RFI/2016-09/msg00065.html (12,565 bytes)

292. Re: [RFI] led bulbs? (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Thu, 29 Sep 2016 13:19:05 +0000
I would be very hesitant to use a published list of quiet bulbs. Many of the big box stores are constantly buying new products from new suppliers, sometimes keeping the same model numbers, but with e
/archives//html/RFI/2016-09/msg00113.html (9,245 bytes)

293. Re: [RFI] Grow light RFI (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Fri, 2 Dec 2016 17:56:26 +0000
As RF lighting devices, they fall under Part 18 of the rules. These are somewhat lower than Part 15. Neither Part 15 nor Part 18 levels are sufficient to protect against all interference, and in some
/archives//html/RFI/2016-12/msg00006.html (13,407 bytes)

294. Re: [RFI] Fwd: FCC is Actively Seeking Solar Array Interference Complaints (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Thu, 16 Feb 2017 15:18:37 +0000
I am not sure that I'd characterize the FCC as "actively seeking complaints." In our experience, they are not looking to take on any more work. The interference report form is more of an information
/archives//html/RFI/2017-02/msg00036.html (9,892 bytes)

295. Re: [RFI] HF range solar panel RFI (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Wed, 12 Jul 2017 17:43:55 +0000
Thanks, Tony. Yes, the League staff really, really want those reports, not only to often provide some one-on-one help, but to identify problem areas, problem manufacturers and to give us a good reaso
/archives//html/RFI/2017-07/msg00024.html (10,394 bytes)

296. Re: [RFI] Noise Cancellers - RFI Survival Guide (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Sat, 11 Nov 2017 16:37:38 +0000
Noise cancellers can be 30 to 50 dB effective against a single source of noise. They work by positioning a sense antenna that will pick up more noise than signal and combining that out of phase with
/archives//html/RFI/2017-11/msg00003.html (9,781 bytes)

297. Re: [RFI] Noise location tools (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Wed, 17 Jan 2018 15:24:27 +0000
There are three problems with the use of ultrasonic dishes: 1. They give false negatives. If an arc were taking place on the top of an insulator, its ultrasonic noise would be blocked in the directio
/archives//html/RFI/2018-01/msg00036.html (13,727 bytes)

298. Re: [RFI] RFI every 15 KHz on 160 meters, suspect source is a manufacturing facility. (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Mon, 5 Feb 2018 17:09:49 +0000
That system would be a Class A Part-15 device, so would have to meet the higher industrial limits. Locally, ie near the motors, controller or wiring, I could well imagine a 50+ dB increase in noise f
/archives//html/RFI/2018-02/msg00033.html (25,788 bytes)

299. Re: [RFI] RFI every 15 KHz on 160 meters, suspect source is a manufacturing facility. (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Mon, 5 Feb 2018 21:55:34 +0000
True, Cortland. I would take the position that if they are switching synchronously, they are a system and as such need to be tested as a system. Having said that, we need to keep in mind that these a
/archives//html/RFI/2018-02/msg00036.html (28,267 bytes)

300. Re: [RFI] RFI every 15 KHz on 160 meters, suspect source is a manufacturing facility. (score: 1)
Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>
Date: Tue, 6 Feb 2018 16:05:31 +0000
Actually, testing BPL was easy. For access BPL, ie, on overhead power lines, the rules said to crank it to the maximum power, then report what power setting was needed to achieve compliance. In pract
/archives//html/RFI/2018-02/msg00039.html (32,564 bytes)


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