[Johnson] Re: GB> RFI

[Glen Zook]

Unfortunately security systems are like many "modern"
telephones in the fact that they do not have the
filtering required so that nearby r.f. transmissions
do not cause problems.

The security company should know what has to be done
to prevent r.f. from causing problems and that has to
be done in their system.  Frankly, there is nothing
that you can do on your end to prevent falsing.

There was a newly licensed amateur radio operator who
lives 5 blocks from me (here in Richardson, Texas) who
got to know both the local police officers and the
local fire department personnel when he first started
operating.  He was setting off the security alarm in
his house without any on-site indication.  Well, there
was an indication in the LEDs but no alarm ever went
off in his house.

This amateur had to get with the alarm company and
they had to make some changes in how his house was
wired.  The amateur can now run at least 750 watts on
HF and relatively high power on VHF and UHF without
activating his alarm system.  The alarm company had to
make all modifications at no charge to the amateur
radio operator even though they probably didn't want
to absorb the charge.

Glen, K9STH


--- "Langston, Mike" <MLangston at hcpriceco.com> wrote:

I got on 75M AM last night testing out a new antenna
(multi-band trap inverted vee for 80/40/20 I picked up
at HamCom). No AM activity that I could hear at 3880
so I dropped down to about 3875 and broke in on a SSB
group. The antenna seemed to be working fine.

Then, the XYL appeared in the shack holding the phone.
Seems our next door neighbor was calling complaining
that I was causing their security system to go off.

This is a new one on me. Anyone ever have trouble with
RFI getting into a security system wreaking havoc? Any
suggested fixes or trouble-shooting I could do?










Glen, K9STH

Website:  http://k9sth.com


       
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