We switched to wireless alarm connected, internal battery detectors due to the occasional RFI interference caused by running a little power on 80 meters. Our alarm company actually had some experience with RFI issues and made the recommendation. I installed them and have a calendar reminder to swap the batteries every fall when the time changes.
Local fire code does not require detectors. Insurance folks give us a break on rates for having them - wired or otherwise here in Ga. Hank K4HYJ > On Oct 29, 2020, at 5:36 PM, Jim Brown <j...@audiosystemsgroup.com> wrote: > > Most RFI to/from ham radio and "devices" is caused by poorly designed > electronics using interconnected wiring as TX/RX antennas. Because of the > frequencies on which they operate, WiFi-connected devices with no exterior > wiring are inherently FAR less likely to create or receive RFI IF they > operate on internal batteries. If running from the AC line or a switching > power supply (wall wart, wall lump, etc.) the PSU will almost certainly > create RFI noise and wiring both on the AC and DC side will radiate it. > > Bottom line -- choose stand-alone devices with internal batteries and no > external wiring for minimum RFI. > > In your situation, I would try one of them before returning them. > > 73, Jim K9YC > >> On 10/29/2020 12:57 PM, Harlan Sherriff via Elecraft wrote: >> Dave, I totally agree. I am sure the “problem” the manufacturer is >> cautioning about is RF, since my original post was about “wireless >> connected” detectors. My gripe was nothing in the sales literature warned >> against it. Not till I bought the units and read the installation guide >> Sent from my iPhone >>>> On Oct 29, 2020, at 3:51 PM, Dave B via Elecraft<elecraft@mailman.qth.net> >>>> wrote: >>> >>> Well, RF (AKA "Radio Waves") can falsely trigger all sorts of equipment >>> that was not "designed" to work with, or be influenced by them. >>> >>> That is the classic EMC Susceptibility or Immunity problem. Basically, >>> poor design and/or implementation of the affected (or sometimes bad >>> installation of an otherwise good) device. > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to h...@optilink.us ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
