It really is not that simple. I own "old construction" and my house is in pretty constant need of maintenance. Some people want a new home and in some areas, all of those come with CC&Rs. In some are
We have come a long way, but still have a ways to go. Fortunately, we are dealing with a company that is holding space for all of this and willing to work towards better and better solutions. The ini
I don't know why the FCC didn't follow up, but the lack of follow-up was on our end. A lot was going on at the time. Now that we can test again, I want to pick up on this, so poor W1VLF is going to h
As I said in another email, a chess game is not usually won in a single grand move. It is a gradual accumulation of advantage. I make those moves within the realm of the achievable and that sets the
W1VLF is in a relatively quiet neighborhood. He, too, had loud spikes every 200 kHz, which did go away when they replaced the optimizers. The inverter at his QTH is still noisy, so he is working with
It is far from that simple, Cortland. "Enforcement" is a very broad term that can range from the advisory letters routinely mailed by the FCC in response to complaints about harmful interference to t
Its a little more complicated than that, Dave. ARRL is funded to do this sort of thing and members expect that for their membership dues, ARRL will do what it takes to help ensure as much of a noise-
And even what is not connected to the system, but nearby. Any radiation from the system can be capacitively coupled or induced in nearby wiring and re-radiated. Grounds can be resonant or not resonan
<We were able to isolate the noise from the solar panels and associated electronics by covering the panels and seeing it disappear.> This is no different from the noise change that occurs when the su
I agree, but I like magic, so that's my story. Yes, one can actually do real science and come up with answers, but that often involved multiple interrelated phenomena that are best sorted out with ex
< That has yet to be determined Ed. Tom Simpson (SE engineer) believes the RFI could be caused by the solar panels themselves which he said has happened in the past.> If that were the case, and I and
Part 18 is primarily for intentional emitters that do not carry information. There are a number of ISM frequency bands allocated for ISM. Within those bands, no licensed user is offered any protectio
When it comes to appliances, there may be nothing to enforce. Appliances are categorically exempt from any specific emissions limits under Part 15. A refrigerator with removed filtering components ma
What may help this in the relatively short run is that the IEEE EMC Society is developing an IEEE Recommended Practice that describes the steps that a power utility should take in response to complai
The ARRL Lab received a report of interference from a Class D audio amplifier that had been installed about 500 feet from an amateur. We purchased a set of them, set them up in our C63.4 conducted-em
< Second, every wire/cable connected to a noise source (in this case, the Class D amplifier, but also including switch-mode power supplies) forms a transmitting antenna for common mode current on tho
Well, I could have used the common-mode filter, which we'd do to solve an RFI issue, but it really was interesting to see the conducted noise increase due to the addition of length to the speaker wir
No, again, this was not a change in impedance, at least not much of one. We initially terminated the speaker outputs with 8 ohm resistors. We measured conducted emissions. We then put real speakers o
The big box stores that sell electronics can and do switch products all the time, and may keep the same model number. We have also seen quality-control issues with products, so an occasional noisy un
Many of the old solid-state amplifiers also have analog supplies. The key is -- weight. If it's got iron, it's analog. Ebay. Search for tube audio amplifier. Most of the results will be crazy over pr