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
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
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
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.
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
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
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
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
< 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
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
<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
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
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
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
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
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
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
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
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
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