All: Purchased a set of USB-powered PC speakers which turned out to be very noisy on HF. The speakers are made by Mica model PB20i. See: https://www.amazon.com/gp/product/B07VTS62L6/ref=ppx_yo_dt_b_a
Hi Jim: I would expect ANY device that powers from USB to have that sort of problem unless the designer has taken great care to avoid it. That does seem to be the case. I returned the speakers to Ama
Thanks for the info Mike. I noticed that they give you the option of powering the speakers with the supplied AC adapter or the PC USB connection. Curious to know if you noticed any RFI when running t
James: Solar Edge used the same suppression techniques on my neighbors installation and it only reduced the noise from S-9 +15 db to S-9 which is still very high. I suspect that the suppression would
James: Your antenna is about 150 feet further away compared to the distance between my neighbors solar panels and my antenna. Its about twice the distance so in theory the noise would be 1/4th as str
Jim: Thanks for that analogy. Tony -K2MO _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
All: The reports I've read suggest that the strength of interference caused by solar panel systems can vary from one installation to the next EVEN when the distance to the source is similar. That var
Jim: Tom Simpson (Solar Edge Engineer) will be visiting the site sometime in the near future so I'm hoping he'll address the potential problems you mentioned. The issues you describe may also explain
James: Jim (K9YC) gave TJ recommendations on the type of chokes that were to be installed on my neighbors installation. However, I'm not sure how much of Jim's design was actually used. Have you had
Jim: I can tell you that your recommendations were passed along to Tom Simpson and others in the engineering department so they're aware of your work. Can't thank you enough for your help. Tony -K2MO
James / WW3S: Can you give us an idea on how effective the RFI suppression was on your neighbors Solar Edge system? I'm sure the group would be interested in a before and after RFI signal strength as
James: Glad to hear that you're able to us HF again so congratulations. I'd be interested in seeing your before and after screenshots so please feel free to send them my way. Thanks, Tony -K2MO On 9/
Paul: The RFI on the home AC lines is identical to the RFI generated by the Solar Edge system. I can't tell you if it's induced or directly injected onto the A/C lines but it's there. More importantl
Ed: This is no different from the noise change that occurs when the sun goes down, so all it really does is demonstrate that the noise is coming from some part of the system. That's correct. The reas
Ed: I agree with all your points, but you have to understand Tom Simpson is convinced that the suppression they installed resolved the issue. He's said that it's virtually impossible for the optimize
James: I watched the crew do each section of the roof separately and then move onto the next when finished. The house is L-shaped with 2 separate pitched roofs with a total of 32 panels on 4 differen
James: The System on the house with the pool was installed years prior to the solar edge system thats causing RFI. Its a Vivint system and it doesnt produce any RFI. There are several houses with sol
All: I'm looking for an RFI-free audio amplifier that I can use to power the external speakers on my SDR transceiver. The PC speakers I've tried were very noisy, especially the USB powered speakers f
All: Any suggestions on where to find such a beast at a reasonable price? Tony _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/
All: A friend of mine suggested I try the entry level Bose speakers for the shack. He said they produced no RFI on HF and it turns out he was right. They also seem impervious to an RF environment eve