A friend of a family member is experiencing an apparent RFI issue which is causing his code required AFCI outlets to trip, apparently due to his neighbors amateur transmissions. This is in the Southe
I too have had my fair share of VHF interference from Ethernet over the years. While I've considered using shielded twisted pair, I don't know how it's supposed to be installed. While I've worked pro
And that seems to be the easy part. I've done runs with STP terminated with metalized RJ-45s. They are installed exactly the same way as standard plastic connectors with the exception that the foil s
Thanks to everyone who has contributed to the discussion on the use of shielded twisted pair. I'm interested in what folks think about connection of the following devices in regard to providing a cir
Hello All, I may be in the market for a ductless AC unit. Many of the newer models seem to come with variable speed compressors which are PWM driven. I haven't seen any comments anywhere about these
Pretty close. The indoor units are actually DC but you have the right idea. Here is an example of what I'm talking about: http://www.daikin.com/global_ac/products/residential/ Both inverting (PWM con
Just wanted to thank everyone for their input on this. Indeed, many of the ductless air conditioning units sold now are actually bidirectional air source heat pumps -- so it's all pertinent. The bott
Has anyone had success specifying a term such as 'RFI Free' when dealing with a contractor? Whenever there is AC (or worse yet, square waves) there is going to be SOME level of RFI, no? The question
I've been looking into the apparent exemption of AC equipment from certain parts of Part 15. It seems very specific and doesn't apply to AC equipment per se, but the digital circuitry contained withi
This really strikes me as a rule of thumb with a large kernel of truth to it. Having to choke external leads simply suggests that the product could have been engineered better from the start. One of
Charles, There is a Remstar Plus I happen to have access to. As an exercise in curiosity I pulled it out to see if I could recreate your findings regarding beeping every two seconds. What frequency o
This is just a total shot in the dark but do they have an air source heat pump which was installed within the last few years? Sometimes these are called ductless AC units. The newer models use PWM to
I've thought quite a bit about incorporating switch mode supplies into my projects for quite a while. It becomes a very attractive option when I look at running 3.3V devices on the 'standard' 13.8V s
It's good to hear about Dale's autopsy as well as the claim that Lutron is very "RFI aware". Just yesterday I purchased a Lutron TGCL-153PH-IV dimmer and will be installing it sometime this week. In
Last summer I had an MUZ-FE18NA installed. My antenna, a delta loop cut for 40m, is located about 50' from the outdoor unit and 30 feet from the indoor unit. I'm a casual operator and have not notice
I understand that the ARRL was testing various models of HTs at Dayton this year for compliance with Part 97 spurious emissions requirements. I don't remember exactly where I heard this but I seem to
I too have been happy with my Cree bulbs from HD. I only operate at 7MHz and above so I haven't done more than a quick listen on MF nor have I operated with an antenna in immediate proximity to the b