The alarm system is not that new, it was installed in 1992 when we moved
here. Unfortunately, I own the hardware, even though they sold it and
installed it. The alarm co. provides monthly monitoring and service if I
request it. But, their technicians are mostly wire jockeys - I doubt they
know how to deal with complex RFI issues.
The system itself is manufactured by NAPCO; I don't have the model number at
the moment, I believe it's 8-something, 8xx. I'll check it tomorrow (box
isn't accessible right now) and post it to you. Again though, it's a ten
year old system.
From: Peter's Mail [mailto:firstname.lastname@example.org]
Sent: Tuesday, November 05, 2002 10:41 PM
To: 'Marc Ornstein'; email@example.com
Subject: RE: [RFI] Re: alarm system RFI - Test Results
Boy - you gave me an idea of another item to check at my QTH - Always
tracking noise sources here by the Jersey shore.....
Who owns the hardware?
If they do not respond in a reasonable way, I would call into the
organization's President or VP and lay it on the line - If they turn a
deaf ear, you'll drop them like a hot potato - The alarm business has
many competitors that would love your business.
Let's hear what hardware/manufacturer you're dealing with model number
etc. Sounds like one to stay away from.
> -----Original Message-----
> From: firstname.lastname@example.org [mailto:email@example.com] On
> Of Marc Ornstein
> Sent: Tuesday, November 05, 2002 22:21
> To: firstname.lastname@example.org
> Subject: RE: [RFI] Re: alarm system RFI - Test Results
> Well folks - the results are in.....drum roll please-=-=-=-=-=-=-=-
> It was the alarm system for sure. Killed all primary and secondary
> to the system this evening and guess what I found out? 75 meters
> has people Qso'ing and atmospheric noise....who could have imagined.
> Turned power back on and all heck broke loose again - S9+ buzzzzzz.
> to be even more certain, I took my Yaesu FT-817 QRP rig around the
> with just the rubber duck attached, tuned to 75M and did a little
> The buzz coming off of the control wires that are exposed, the keypads
> especially the main control unit is just phenomenal. My HF antenna
> outside, at least 40 feet from my shack and 25 feet from the house,
> the coax does run along the concrete foundation of the house. I would
> the noise is making it in via the coax. Definitely not through the
> lines. Maybe even at the antenna, in which case that's one heck of a
> radiated signal from the alarm.
> Called the alarm company, explained to a not very bright (though
> Customer Service person in very easy to understand language the whole
> scenario. After a 10 second pause, he said let me put you on hold -
> lasted almost 10 minutes. At that point he came back on and said he
> to speak to another technician about it and call me back tomorrow, but
> doubts there's anything they can do about it if my alarm system is
> what it's supposed to and thanked me for calling.
> By the way, the control unit box has no verbage anywhere indicating
> complies with FCC regs. I also noticed that the only ground is the
> box in which it's housed!
> Anyway, it looks like it will be a continued uphill battle with the
> co. For a quick fix, I may just try one of the noise cancellation
> either the MFJ or Timewave until such time that I have the time to
> Pheewwww. Thanks again to all who provided responses, advice, etc,
> privately to me or to the list.
> Marc, WB2JUF
> RFI mailing list