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Re: [RFI] Non-transmitting tower causes RFI/EMI?

To: "Larry Benko, W0QE" <xxw0qe@comcast.net>, <n6cy@earthlink.net>
Subject: Re: [RFI] Non-transmitting tower causes RFI/EMI?
From: "EP Swynar" <gswynar@durham.net>
Date: Wed, 14 Nov 2007 10:01:58 -0500
List-post: <mailto:rfi@contesting.com>
Hi Rick,

Alas & alack, were I you, I would give some very SERIOUS thought to moving
away from the neighbourhood, & into the country...

Years ago, when we resided in the bowels of suburbia, I had one neighbour
who suddenly whined incessantly about RFI to her imported two-line telephone
system, whenever I was on 10-meters. After several phone calls, and letters
to the phone company by me (as well as and on-site tests by me & my Ham
friends), I discovered --- quite by accident --- that the company had very
nicely & properly REPLACED the neighbour's afflicted telephones with
upgraded BRAND NEW units, for free...!

She never even had the decency to tell me...

But then, she did show her gratitude for what I had done, after a fashion,
by spilling cranberry juice all over one of her new phones! What a

The icing on the cake --- after all this wonderful co-operation and
neighbourly interaction --- was the evening I was playing with my baby son,
when the phone rang. It was her, with an accusatory snarl in her voice,
saying, "...You're on the radio again, aren't you...?!"

That was it.

We sold the house, moved to 4 acres in the country, and I have NOT looked

Lesson learned: there are two kinds of people in this world, i.e. those who
are selfish, inconsiderate, and just LOVE to whine & complain "...because
they are able to", and those who just want to enjoy Ham radio, in peace...!

~73~ Eddy VE3CUI - VE3XZ


----- Original Message ----- 
From: "Larry Benko, W0QE" <xxw0qe@comcast.net>
To: <n6cy@earthlink.net>
Cc: <rfi@contesting.com>
Sent: Wednesday, November 14, 2007 9:44 AM
Subject: Re: [RFI] Non-transmitting tower causes RFI/EMI?

> Rick,
> Since the neighbor is not too cooperative I would try a different
> approach. Why not go to the store and buy the exact same model as your
> neighbor has and put it in your house.  I  believe this model is a 2
> wire AC powered (no ground connection) detector with no other
> connections to anything.  If this is not correct then the following does
> not apply.
> Perhaps it will work properly but if not I would put a AC line filter in
> front of it such as one of the TrippLite units which has both common
> mode and differential filtering and see if that fixes the false alarms.
> If it does I would then try an AC rated capacitor across the AC line
> with a value of .047uF or .01uF.  A device which has no connection other
> than the AC is probably not suffering from any common mode current
> issues since there is no place for this current to go.  The capacitor
> across the line will help differential noise issues.
> I have an old AC powered CO detector which never gave false alarms
> unless I was transmitting.  After mounting the capacitor inside the unit
> right at where the AC connects it has never complained since.  If this
> fixed your unit, you then could say to your neighbor that his unit must
> be defective and that you would give him your unit (fixed of course)
> since you are such a nice guy.
> Good luck,
> 73, Larry  W0QE
> Rick Low wrote:
> > For the past year and a half my neighbor has claimed frequent
> > to his Kidde "Nighthawk" Carbon Monoxide detectors. While we've been
able to
> > prove a few frequency/power combinations that definitely result in false
> > alarms, a majority of the "alarms" occur when I'm not transmitting at
> > The neighbor's claim is that my tower (and by extension, the yagi on it)
> > somehow 'reflecting' another signal in the neighborhood and causing the
> > false alarms.
> >
> > I've tried to explain the implausibility of the claim, and even tuned
> > through the HF spectrum during some of these false alarms, without
> > any signals that to me would obviously be strong enough to cause them.
> > the belief remains in my neighbors' mind that I am the cause of the
> > occurrences in their house. My house is experiencing zero false alarms
> > during the same period.
> >
> > So the question for the community: Is my neighbors' claim valid? How
might I
> > go about helping to prove (or disprove) it?
> >
> > Many thanks for your candid thoughts. 73 Rick N6CY/4
> > _______________________________________________
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> >
> >
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