Rodger a couple of things I'd like to suggest is when you turn off the main
make sure that you're not just reducing the amount irradiation to the level
that it seems like it's gone. Sometimes turning off the main cuts off a large
portion of antenna that helps to radiate the noise. by doing that it would make
it seem as the noise is gone when really it's just much much weaker than it
used to be and you don't know that it still radiating. The same thing can occur
when you're turning off individual breakers. When you turn off the breaker to
the room you're in the noise goes away because you just shut off half of the
antenna in that area. So once you turn off the breaker or main go outside to
the meter and make sure you can't hear the noise radiating from the other side
of the meter.
once you're certain that the noise is in that residence and you turn off the
individual breaker that controls that noise then go to that area of the house,
not looking for a specific item, and unplug everything starting at the door to
that area and go around the walks and unplug everything one at a time. do this
until you turn off the device that's creating your noise problem. remember
sometimes circuits two adjacent rooms are tapped off the circuit in the
previous room so you could easily have an outlet in the next room that's on the
circuit of the original rim. Also it's often that electricians will tap off of
a circuit in the attic and run it to the other side of the house.
Don't be fooled by the arcing sound the only way to really tell it's an arc is
by looking at it on an oscilloscope. it's always best not to judge the sound in
the source. Just tracked the noise. Don't go looking for specifics because that
just has you're running all over the house. another thing, the noise is
radiating from every wire in the house so trying to sniff it out isn't very
useful inside of the house because as you pass a wire in the wall than the boys
were radiate in the level will increase its can be very misleading.
Visit www. RFI services.com and look at the how to locate information there it
would be very useful to have this in hand when you go to the neighbor's house
and hand it to them. The last couple paragraphs you'll find very useful in your
explanation.
From Mike's Mobile Email
Sent from BlueMail
On Aug 10, 2019, 4:03 PM, at 4:03 PM, ROGER STEPHENS via RFI
<rfi@contesting.com> wrote:
>Listmates - after 60 good years in our hobby with more than enough rfi
>sniffing and eventually eliminating I have met my match. I ventured
>yesterday into my infirmed and mideighties afghan neighbors home which
>is
>producing a roughly 25-30 db hash above my noise level on all bands.
>After
>a complete house recon, I still could not locate the source with my
>trusty
>grundig yachtboy since the whole house was so hot (rfi can be heard
>from
>several hundred yards away) that I could not discern a specific
>culprit.
>The owners who were a bit confused by my endeavor and our language
>challenges said that nothing had changed recently except when a
>bathroom was
>remodeled, the handyman replaced numerous wall outlets. So after more
>chat
>effort, I shut down the house mains and the noise disappeared so I know
>the
>gremlin(s) is hiding within. Not overstaying my welcome, I begged
>forgiveness for the fruitless invasion but assured them I must come
>back.
>My plan so far is next visit to shut down each circuit at the fuse box
>till
>the noise is isolated and then attempt to sweep that area of the house.
>Since my detective work must be short time wise and the rfi is so
>strong,
>what possible source might I look for and hopefully be able to unplug
>knowing that it pulses 30 times a minute continuously and sounds like
>arcing
>to me with an audible preemptive spike at the beginning of each hash.
>It
>begins as low as 85 khz and continues to pulse up to around 3 mhz where
>it
>gradually becomes a continuous noise all the way up to 6mtrs. I trust
>that
>some of you reading this postmightl have some guidance to share as I
>really
>do miss being able to hear both my modern rigs as well as the fleet of
>aging
>boatanchors. J 73 es bye4now, roger k5vrx
>
>_______________________________________________
>RFI mailing list
>RFI@contesting.com
>http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|