Every AHJ is different. Find out what yours says. Jim ab3cv
On Thu, Oct 29, 2020 at 10:16 PM Hank via Elecraft <[email protected]> wrote: > 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 <[email protected]> > 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< > [email protected]> 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:[email protected] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [email protected] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
