Kelly:
You didn't say whether or not you walked the neighborhood at the
same time you could hear the signal using your beam. I assume
you did, which raises a question ....
If you heard it with your regular radio and beam, but not with
the little radio and whip, then are you sure the signal is coming
from your neighborhood?
I once had a similar type noise and had to drive around all over
the place before pinpointing it about 3 miles away from my house.
I would suggest that you go out in your car, with radio and whip
at a time the interfering signal is active, and head out of the
neighborhood and in the general direction indicated by your beam.
Keep in mind that the beam indication may not be perfect. Be
prepared to go a few miles in various directions.
I think you will find it further away than you are currently
thinking about.
-----Original Message-----
From: rfi-bounces@contesting.com
[mailto:rfi-bounces@contesting.com] On Behalf Of Richard (Rick)
Karlquist
Sent: Tuesday, October 03, 2006 10:00 PM
To: Kelly Johnson; rfi@contesting.com
Subject: Re: [RFI] DFing an HF RFI source
I had pretty good luck with a receiving loop
(the so-called "shielded" loop made of coax).
Orient for a null and the RFI is broadside to
the loop.
Rick N6RK
> -----Original Message-----
> From: rfi-bounces@contesting.com
[mailto:rfi-bounces@contesting.com]On
> Behalf Of Kelly Johnson
> Sent: Monday, October 02, 2006 4:57 PM
> To: rfi@contesting.com
> Subject: [RFI] DFing an HF RFI source
>
>
> I have an RFI source in my neighborhood that I'd like to track
down,
> but could use some advice.
>
> The noise source sounds like a "click" or small burst of energy
at
> approximately 1Hz. In other words, I hear a burst of RFI a
little
> faster than once per second. It seems to be relatively narrow
band.
> I don't hear it below 17 meters. It is strongest on 17 meters,
but I
> can sometimes hear it on 15 meters and maybe even 10. I've
never
> heard it above that. I have DF'd the general direction using
my tower
> mounted HF yagi and the RFI peaks at about S7 or S8 on 17
meters which
> is fairly strong, however I can't hear it when I walk the
neighborhood
> in that direction with my FT-817 and a whip. I obviously can't
carry
> a 17 meter yagi around the neighborhood. What other decent
antenna
> can I use to DF something doesn't appear to be broadband enough
reach
> into the VHF region?
>
> FYI - The strength of this noise source varies from day-to-day
and
> some days I don't hear it at all, but it's there most of the
time.
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>
>
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