[Elecraft] K3 and wireless intruder alarm
I'm thinking of installing a wireless home security system running on 868 MHz (FM). I run up to 100 watts through the built-in ATU, into an Elecraft balun, open wire feeder and 88ft dipole at 30ft. Has anyone any experience they can share please? Am I likely to trigger the alarm? Thanks David G4CWB __ 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
Re: [Elecraft] K3 and wireless intruder alarm
Both I and K0CF have wireless home security systems that I think run on 900 MHz or so. We both run in excess of 500 watts to K4KIO hexagonal beams at 35 to 40 feet. Our towers are bracket to the house. Neither of us have experienced any problems. David K0LUM On Jul 13, 2013, at 12:25 PM, David Andrews wrote: I'm thinking of installing a wireless home security system running on 868 MHz (FM). I run up to 100 watts through the built-in ATU, into an Elecraft balun, open wire feeder and 88ft dipole at 30ft. Has anyone any experience they can share please? Am I likely to trigger the alarm? Thanks David G4CWB __ 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 __ 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
Re: [Elecraft] K3 and wireless intruder alarm
On 7/13/2013 10:25 AM, David Andrews wrote: Am I likely to trigger the alarm? Alarm systems in general, at least in North America, are notoriously bad for RF susceptibility. The coupling mechanisms are primarily poorly filtered signal wiring, Pin One Problems, poor circuit layout, and poor shielding. To the extent that it has less external wiring, a wireless system MIGHT be less problematic, but those other mechanisms are still there. Suppression methods are addressed in http://k9yc.com/RFI-Ham.pdf 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
Re: [Elecraft] K3 and wireless intruder alarm
Don't know what his system will be like, but the system I have as absolutely no wiring between any of the components. Everything is wireless. Experience of two of us has been no problems while running high power levels using good equipment into well designed antennas. These data points only involve one brand of security system however. David K0LUM On Jul 13, 2013, at 12:37 PM, Jim Brown wrote: On 7/13/2013 10:25 AM, David Andrews wrote: Am I likely to trigger the alarm? Alarm systems in general, at least in North America, are notoriously bad for RF susceptibility. The coupling mechanisms are primarily poorly filtered signal wiring, Pin One Problems, poor circuit layout, and poor shielding. To the extent that it has less external wiring, a wireless system MIGHT be less problematic, but those other mechanisms are still there. Suppression methods are addressed in http://k9yc.com/RFI-Ham.pdf 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 __ 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
Re: [Elecraft] K3 and wireless intruder alarm
David, I suspect that you'll probably be OK going wireless, especially running only 100 watts. Our security system is about 22 years old and is a WIRED system, meaning a lot of wires (antennas!) running through the walls of our two story home. With my K3 running barefoot at 100 watts, I experienced NO interference to the system when using either my ground mounted Hustler 5BTV or my 88-foot long doublet at 40 feet. However, when I purchased the KPA500 and ran 500+ watts to the vertical, it was a different story. Had lots of interference to the security system and a few other in-home devices. I wound up placing several ferrite beads on each end of every wire going into the control box of the security system - a couple at the box, and a couple more at the operator panels on the doors. Seemed to resolve the problem. With your wireless system, you shouldn't have those problems at 100 watts. If you get an amp, all bets are off!!! 73 GL, Jim / W6JHB On Saturday, Jul 13, 2013, at Saturday, 10:25 AM, David Andrews wrote: I'm thinking of installing a wireless home security system running on 868 MHz (FM). I run up to 100 watts through the built-in ATU, into an Elecraft balun, open wire feeder and 88ft dipole at 30ft. Has anyone any experience they can share please? Am I likely to trigger the alarm? Thanks David G4CWB __ 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 __ 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
Re: [Elecraft] K3 and wireless intruder alarm
We have ADT wireless and no problems Reggie k6xr Amateur radio 58 years DXCC, RCC, WAC Sent from my iPad On Jul 13, 2013, at 10:37 AM, Jim Brown j...@audiosystemsgroup.com wrote: On 7/13/2013 10:25 AM, David Andrews wrote: Am I likely to trigger the alarm? Alarm systems in general, at least in North America, are notoriously bad for RF susceptibility. The coupling mechanisms are primarily poorly filtered signal wiring, Pin One Problems, poor circuit layout, and poor shielding. To the extent that it has less external wiring, a wireless system MIGHT be less problematic, but those other mechanisms are still there. Suppression methods are addressed in http://k9yc.com/RFI-Ham.pdf 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 __ 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
Re: [Elecraft] K3 and wireless intruder alarm
I have Protection 1 and noticed an increase in noise level once the system was installed especially on 6m. I moved my antenna from above the house to my tower that is away from the house and the noise reduced significantly. Other bands did not seem as affected. The antenna was above my house and not far from other homes and residences so this might be coincidental to my neighbor installing a new plasma or something like that too. Good luck! Keith AK6ZZ Sent from my iPhone please excuse typos On Jul 13, 2013, at 11:01 AM, Reginald J Mackey SR k...@icloud.com wrote: We have ADT wireless and no problems Reggie k6xr Amateur radio 58 years DXCC, RCC, WAC Sent from my iPad On Jul 13, 2013, at 10:37 AM, Jim Brown j...@audiosystemsgroup.com wrote: On 7/13/2013 10:25 AM, David Andrews wrote: Am I likely to trigger the alarm? Alarm systems in general, at least in North America, are notoriously bad for RF susceptibility. The coupling mechanisms are primarily poorly filtered signal wiring, Pin One Problems, poor circuit layout, and poor shielding. To the extent that it has less external wiring, a wireless system MIGHT be less problematic, but those other mechanisms are still there. Suppression methods are addressed in http://k9yc.com/RFI-Ham.pdf 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 __ 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 __ 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
Re: [Elecraft] K3 and wireless intruder alarm
I've used a wireless home alarm system for 13 years with hf/vhf/uhf antennas in the attic of a 3 story townhouse. The documentation doesn't include specs. The antenna on the master unit is approximately 13 cm. Depending on whether that's a quarter wave or full wave, it's in the bottom or top of the microwaves. Using my K3 at 100w all bands doesn't affect the system. Running 50w on 70cm does affect my 5.8 GHz wireless telephone system. I'm guessing that it's crunching the receiver front end or getting rfi into the master's control circuitry. 73, Steve W4FMD On 7/13/2013 1:25 PM, David Andrews wrote: I'm thinking of installing a wireless home security system running on 868 MHz (FM). I run up to 100 watts through the built-in ATU, into an Elecraft balun, open wire feeder and 88ft dipole at 30ft. Has anyone any experience they can share please? Am I likely to trigger the alarm? Thanks David G4CWB __ 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 . __ 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
Re: [Elecraft] K3 and wireless intruder alarm
My alarm system uses a combination of wires, for the doors, and wireless for all windows and motion detectors. I usually run the K3 with the KPA500 at around 450-500 watts and have no problems whatsoever! 73 de Jim - KE8G David Christ radio...@mchsi.com wrote: Both I and K0CF have wireless home security systems that I think run on 900 MHz or so. We both run in excess of 500 watts to K4KIO hexagonal beams at 35 to 40 feet. Our towers are bracket to the house. Neither of us have experienced any problems. David K0LUM On Jul 13, 2013, at 12:25 PM, David Andrews wrote: I'm thinking of installing a wireless home security system running on 868 MHz (FM). I run up to 100 watts through the built-in ATU, into an Elecraft balun, open wire feeder and 88ft dipole at 30ft. Has anyone any experience they can share please? Am I likely to trigger the alarm? Thanks David G4CWB __ 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 __ 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 __ 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
