Re: [Elecraft] OT: Kidde smoke detectors; Any follow up on RFI frm wireless models?
Hello, I thought I'd close the loop on this topic. I went ahead and installed three Kidde 10 year wirelessly interconnected smoke/ CO detectors and so far so good. I've been running 350 watts on 160 and 80 and that did not trigger them. Perhaps it's time to replace the KPA500 with a KPA1500 and do some further testing ;-) 73 de Paul VA3LX -- Sent from: http://elecraft.365791.n2.nabble.com/ __ 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
Re: [Elecraft] OT: Kidde smoke detectors; Any follow up on RFI frm wireless models?
Hello Lyn and Thanks. I have a very similar arrangement with the KPA/KAT500 and three wired Kidde smoke/ CO detectors. I've had problems with it periodically over the years in spite of various attempts to resolve triggering the smoke detectors using various ferrite cores and bypass capacitors and being as fastidious as I can with grounding in the shack. Glad to hear it's working well in your shack ;-) I'd be interested if anyone has experience running some power with the new wirelessly interconnected Kidde detectors that create their own rf based interconnection rather than use the wifi system that may already be present in the home. TNX agn dw Paul VA3LX On Sun, Nov 8, 2020 at 4:36 PM Lyn Norstad wrote: > I have a fairly new Kidde wired system (battery / AC) with a total of 10 > sensors on 3 levels. > > No RF issues with KPA/KAT500 at full power on any band 160-6m, any mode. > > 73 > Lyn, W0LEN > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of VA3LX > Sent: Sunday, November 08, 2020 1:22 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] OT: Kidde smoke detectors; Any follow up on RFI frm > wireless models? > > Hello, > > I read the thread from several weeks ago discussing the Kidde wireless > interconnected smoke detectors and the concern that they would be triggered > by RF from ham radio. > > Has anyone who is running any power tried them? > > A local ham running 100 watts hasn't had problems. > > I have a Kidde wired interconnection smoke detector system that I trigger > with > 250 watts. Numerous attempts with ferrite chokes and bypass > capacitors haven't resolved it. > > TNX > > de Paul VA3LX > > > > -- > Sent from: http://elecraft.365791.n2.nabble.com/ > __ > 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 l...@lnainc.com > > __ 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
Re: [Elecraft] OT: Kidde smoke detectors; Any follow up on RFI frm wireless models?
I have a fairly new Kidde wired system (battery / AC) with a total of 10 sensors on 3 levels. No RF issues with KPA/KAT500 at full power on any band 160-6m, any mode. 73 Lyn, W0LEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of VA3LX Sent: Sunday, November 08, 2020 1:22 PM To: elecraft@mailman.qth.net Subject: [Elecraft] OT: Kidde smoke detectors; Any follow up on RFI frm wireless models? Hello, I read the thread from several weeks ago discussing the Kidde wireless interconnected smoke detectors and the concern that they would be triggered by RF from ham radio. Has anyone who is running any power tried them? A local ham running 100 watts hasn't had problems. I have a Kidde wired interconnection smoke detector system that I trigger with > 250 watts. Numerous attempts with ferrite chokes and bypass capacitors haven't resolved it. TNX de Paul VA3LX -- Sent from: http://elecraft.365791.n2.nabble.com/ __ 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 l...@lnainc.com __ 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
[Elecraft] OT: Kidde smoke detectors; Any follow up on RFI frm wireless models?
Hello, I read the thread from several weeks ago discussing the Kidde wireless interconnected smoke detectors and the concern that they would be triggered by RF from ham radio. Has anyone who is running any power tried them? A local ham running 100 watts hasn't had problems. I have a Kidde wired interconnection smoke detector system that I trigger with > 250 watts. Numerous attempts with ferrite chokes and bypass capacitors haven't resolved it. TNX de Paul VA3LX -- Sent from: http://elecraft.365791.n2.nabble.com/ __ 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
Re: [Elecraft] OT: Kidde smoke detectors
I have a Gen 1 Simplisafe system in our older MO outbuilding which is partially finished to house my shack. It has been in operation for four years with no RFI issues. The adjacent outbuilding has a Gen 2 system that was installed last Spring – I need to disable it and see if the grunge on 15 m goes away. I do not think I operated from MO after installing it last spring. It took 3+ hours of dealing with their care folks to get it to work. When we were done I think I had them trained. 73 Bob R __ 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
Re: [Elecraft] OT: Kidde smoke detectors
FWIW, we use a Nest Protect here (hardwired into A/C, too) and haven't had problems with RFI. I imagine it'd be a different story if it didn't use Wi-Fi, though. Speaking of Wi-Fi, our Ubiquiti access point required at least four Ethernet chokes, a third party PoE injector and CAT7 shielded cable to get the RFI down to an acceptable level. That was a fairly surprising thing to have happen but I guess PoE in general is well known to be really bad for RFI (and the limited antenna possibilities at the QTH I'm sure didn't help either). -Mooneer K6AQ On Sat, Oct 24, 2020 at 9:02 PM Mark Goldberg wrote: > I have an older wired alarm system that uses serial data, and it is > indeed awful. The serial data is quite slow but it has no filtering. I > added an LC filter that works well enough to keep the RFI out of my > station, at least down to the level of what comes from my neighbors > and keeps my station from setting off the alarm system (most of the > time). > > At my son's house, he and neighbors have some SimpliSafe and other > wireless alarm systems and the HF Ham bands are wiped out by the RFI. > I have no idea what nominal frequency range or signalling they use. I > would expect for battery life they would not transmit often, but > whatever they do to create the RFI is continuous. > > I also have a hard wired smoke alarm from Kidde. That uses a DC > interconnect between units. I believe any unit that goes off pulls a > line up to about 9 V and they all go off. They are kind of cagey as to > exactly what the interconnect signal is though, so I may be a little > off. I have not detected any issues with RFI or susceptibility. Those > may indeed work for you. > > I do have a Spectrum Analyzer and multiple types of clamp on probes > and antennas but have not taken the time to do any quantitative > measurements of any of these. > > Having to tell the Fire Department that the fire alarm is false is not > a good thing. > > 73, > > Mark > W7MLG > > On Sat, Oct 24, 2020 at 7:38 PM Jim Brown > wrote: > > > > On 10/24/2020 6:53 PM, Harlan Sherriff via Elecraft wrote: > > > So, guess I’ll send these back and get some hardwired interconnected > units. > > > > That is probably a recipe for noise, radiated by that interconnected > > wiring. The security industry has long been notorious for EMC to and > > from their systems. WiFi interfacing should reduce both significantly, > > but before committing to anything, chat up engineers at the company > > about RFI. > > > > 73, Jim K9YC > > __ > > 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 marklgoldb...@gmail.com > __ > 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 moon...@gmail.com __ 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
Re: [Elecraft] OT: Kidde smoke detectors
I have an older wired alarm system that uses serial data, and it is indeed awful. The serial data is quite slow but it has no filtering. I added an LC filter that works well enough to keep the RFI out of my station, at least down to the level of what comes from my neighbors and keeps my station from setting off the alarm system (most of the time). At my son's house, he and neighbors have some SimpliSafe and other wireless alarm systems and the HF Ham bands are wiped out by the RFI. I have no idea what nominal frequency range or signalling they use. I would expect for battery life they would not transmit often, but whatever they do to create the RFI is continuous. I also have a hard wired smoke alarm from Kidde. That uses a DC interconnect between units. I believe any unit that goes off pulls a line up to about 9 V and they all go off. They are kind of cagey as to exactly what the interconnect signal is though, so I may be a little off. I have not detected any issues with RFI or susceptibility. Those may indeed work for you. I do have a Spectrum Analyzer and multiple types of clamp on probes and antennas but have not taken the time to do any quantitative measurements of any of these. Having to tell the Fire Department that the fire alarm is false is not a good thing. 73, Mark W7MLG On Sat, Oct 24, 2020 at 7:38 PM Jim Brown wrote: > > On 10/24/2020 6:53 PM, Harlan Sherriff via Elecraft wrote: > > So, guess I’ll send these back and get some hardwired interconnected units. > > That is probably a recipe for noise, radiated by that interconnected > wiring. The security industry has long been notorious for EMC to and > from their systems. WiFi interfacing should reduce both significantly, > but before committing to anything, chat up engineers at the company > about RFI. > > 73, Jim K9YC > __ > 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 marklgoldb...@gmail.com __ 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
Re: [Elecraft] OT: Kidde smoke detectors
K4HES wrote: > So, guess I'll send these back and get some hardwired interconnected units. That might be the wrong thing to do. We had a number of wired interconnected units in our house, but the one closest to the shack and antennas started alarming every time I transmitted on 40m with more than 100 W, and because they were interconnected, the alarm was heard everywhere in the house. I replaced that one detector with a battery-only, non-interconnected unit and the problem went away - the non-interconnected unit has no RFI problem, and neither does the interconnected part of the system elsewhere in the house. I would expect wireless interconnected units to be less of a problem than wired ones. If one of them did have an RFI problem, it would be easy to replace it with a no-interconnected unit at the vulnerable location to see if that fixed the problem. 73, Rich VE3KI __ 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
Re: [Elecraft] OT: Kidde smoke detectors
On 10/24/2020 6:53 PM, Harlan Sherriff via Elecraft wrote: So, guess I’ll send these back and get some hardwired interconnected units. That is probably a recipe for noise, radiated by that interconnected wiring. The security industry has long been notorious for EMC to and from their systems. WiFi interfacing should reduce both significantly, but before committing to anything, chat up engineers at the company about RFI. 73, Jim K9YC __ 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
[Elecraft] OT: Kidde smoke detectors
Heads up! Keeping with the suggested 10 year smoke detector replacement, and wanting to add a couple more and have them all alarm if one alarms, I bought Kidde wireless interconnected detectors. Well, start installation, read the manual. Under Locations To Avoid: Near amateur radios or other devices known to transmit an RF signal. So, guess I’ll send these back and get some hardwired interconnected units. Harlan K4HES 73 Sent from my iPhone __ 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
