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Re: [RFI] Noise

To: <rfi@contesting.com>
Subject: Re: [RFI] Noise
From: "Dave N0RQ" <n0rq-lists@sbcglobal.net>
Date: Tue, 24 Jul 2007 08:41:43 -0500
List-post: <mailto:rfi@contesting.com>
It sounds (to me) like typical power line noise.

If it stops when wet (during/after rain, or when dew in the morning),
it probably is power line noise.

It would be interesting to hear with in AM mode with no noise-blanking.

Hunting it with small directional antenna on 2m or 70cm (mode AM or SSB)
is usually best way to track it.  I am fighting the same tiring battle --  
might find helpful comments on my site
You call also listen & see my power line noise recordings there, and compare
with yours, if you wish.

Dave N0RQ

----- Original Message ----- 
From: "Yuri Onipko" <ve3dz@rac.ca>
To: <rfi@contesting.com>
Sent: Tuesday, July 24, 2007 08:02
Subject: [RFI] Noise

> For quite some time I hear noise that bothers me big time.
> You may listen to it at http://www.rigexpert.net/noise1.wav
> The recordings was done on 18 MHz using FT1000D in USB mode with 2.0 kHz
> filter ON. Almost S 9 on the meter...
> I hear it on all bands, with peaks on 7, 10, 14 and 18 MHz, but this is
> probably because of better antennas for these bands. Usually it stays all
> night and disappears some time in the morning, AFTER I go to work. But
> sometimes it stays ALL DAY and disappears in the evening. I'd say I don't
> have precise pattern for it.
> The noise is definitely coming from the direction of my neighbour's house 
> as
> far as I can determine by turning my TH6 beam, however, there is a street
> with street lights in that direction too. The noise stays ON even when the
> street lights are OFF, but sometimes (very seldom) there is no noise when
> the lights are ON...
> Any idea what could it be? Would appreciate any lead or INFO.
> 73 Yuri  VE3DZ
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