[Elecraft] K3 and wireless intruder alarm

Steve Glickstein w4fmd.steve at gmail.com
Sat Jul 13 14:16:40 EDT 2013


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
>
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