I agree with Dave on this one; at least with respect to the solar systems being made by Solar Edge, a lawsuit is probably the last thing Amateur Radio wants to do. First, there is clear and existing
One group of hams started to post RF-noisy locations on a Google map. Growers in that area did not want to appear on the map. For the crop usually grown, there is a 16-hour on/8-hour off lighting cyc
It may depend who you contact. Hams that call the FCC toll-free number may be told that, but if Amateur Radio is mentioned, the case should be shuttled over to Laura Smith. Those that work with Laura
Mike Gruber, I am thinking that we need to get out to that Connecticut Solar-Edge installation and make some 30 MHz radiated emissions measurements. The devices probably don't exceed the limits for A
I doubt that the foam will do all that much. First, as you point out, the noise is probaby being radiated by the wires, not the box. Second, RF-absorber foam is usually not very effective at HF. It m
Mike has been in communication with the Solar Edge engineers almost from the beginning, with some of the engineers in Israel. The "usual" solution has worked in some cases, while in other cases not.
"What is it?" is the wrong question. If someone said that it is a model Z-123 Netstuff modem, that really wouldn't help much. The real question is: "Where is it?" Finding the house or location where
I remember the wireless modem jacks on 3.53 MHz very well. What I learned in those days what that, for the most part, emissions from devices plugged in to house wiring exhibits two phenomena: 1. They
Most of the time, noise sources spaced 10 to 100 kHz apart are switching power supplies or similar devices. They exhibit the following characteristics: 1. The noise appears at intervals across a ban
As ideal as it may sound to destroy every switcher, this is just not going to be a practical solution. Every electronic device in your home, from your LED bulbs to your TV and every modern appliance
Depending on the grower, you'd either get them to shut it down, or shoot at you. What is legal on the state level is still not legal on the federal level and when it comes to enforcement, the current
The FCC has not generally tried to interpret things as appliances that are not. The devices are still subject to the requirement that the operator of the device not cause harmful interference. Ed, W1
Now, I am looking at the rules for categorical exemptions, and not every device that is an "industrial plant" would be categorically exempt. "A digital device used exclusively as an electronic contro
Switchers generally show the following characteristics: They create noise every N kHz over a broad frequency range, with N typically being 10 to 100 kHz. The may be on continuously, but may also come
Could that also be changes in the video scene being radiated? In general, the power supply will be rather hummy and its frequency may drift. When I heard a plasma TV, it was very stable with frequenc
Those regulations all apply to emissions from the device. In the US, with very few exceptions, there are no FCC rules regarding immunity. This now-out-of-print-but-wisely-archived FCC document may he
I agree with Jim; this problem is being caused by the fundamental signal of your station. Harmonics from that amplifier are down many tens of dB and if 500 W causes your problem but 100 watts does no
There are a number of possibilities here. Yes, the panels themselves could be generating noise by any of a few different mechanisms. What is not really known is whether this is an extreme near-field
I will. Tony is pretty good with RFI, but there are always a lot of variables in residential environments, and we can take the panel to a few different locations, just to eliminate confounding factor
Devices that operate above 9 kHz are regulated by the FCC. The definition of ISM in Part 18 explains why fluorescent RF-lighting devices are regulated as ISM devices: "(c) Industrial, scientific, and