[R-390] powerline noise

Wed, 26 Mar 2003 22:54:09 -0500

Could this be Power Line Comunications (PLC), where data neworks or utility
monitoring signals are carried through power lines.  I think they operate in
frequencies up to 142 kHz, maybe what you're seeing is some harmonic
multiple.

----- Original Message -----
From: "Glen Galati" <[email protected]>
To: "Dave and Sharon Maples" <[email protected]>; "Mark Richards"
<[email protected]>; "'Terry O'Laughlin'"
<[email protected]>; <[email protected]>
Sent: Wednesday, March 26, 2003 9:03 PM
Subject: Re: [R-390] powerline noise

> Hello INTERFERENCE GROUP,
> For my TWO CENTS WORTH!
> 400-450 Hertz sounds very unusual.  I think a Spectrum Analyzer is in
order
> or a NOISE MEASURING SET. I anxiously await the verdict.
>
> Best Regards,
> Glen Galati, KA7BOJ       [email protected]
> Tacoma, WA
>
> p.s. Is anyone out there using ELITE SERVERS as there Web Server.  We've
> been down since late Sat night. and I think their system has been
seriously
> compromised.
> ----- Original Message -----
> From: Dave and Sharon Maples <[email protected]>
> To: Mark Richards <[email protected]>; 'Terry O'Laughlin'
> <[email protected]>; <[email protected]>
> Sent: Wednesday, March 26, 2003 4:22 PM
> Subject: RE: [R-390] powerline noise
>
>
> > Terry: First, I think I'd check to see if my own house was in order.  If
> you
> > can drop power to your entire house, do that with the Sony on batteries
> and
> > see if the spur goes away.  If it does, then restore power and drop
> breakers
> > one at a time till you find the offending circuit, then go figure out
what
> > equipment is causing the problem.  Since it's strongest close to your
> house,
> > chances are good that it's something in the house.  I have a TV set that
> > causes these kinds of problems from time to time, as well as some
network
> > gear that does also.  Be sure you are listening to the fundamental so
that
> > you get the most signal from the device.
> >
> > Hope this helps.
> >
> > Dave Maples
> >
> > -----Original Message-----
> > From: [email protected] [mailto:[email protected]]On
> > Behalf Of Mark Richards
> > Sent: Wednesday, March 26, 2003 7:00 PM
> > To: 'Terry O'Laughlin'; [email protected]
> > Subject: RE: [R-390] powerline noise
> >
> >
> > If you think that this is something that's being generated by your
> electric
> > utility, they have to investigate it, and within a specified period
(which
> > escapes me at the moment).  Same thing with the smelter.  If they are
> > radiating crap, they have to clean it up.  The FCC will get involved if
> the
> > utility does not comply (sometimes with a nasty-gram).
> > Check in with the ARRL.  They have considerable experience in this area
> and
> > are often called on to act on the Amateur's behalf.
> >
> > We had an issue with our local power company and they contracted with a
> > former FCC inspector who had all the necessary test gear to locate the
> > source, at least one of which they found.  It's in the utilities best
> > interest.  In our case, the utility replaced some equipment which was
> about
> > to fail.
> >
> > Mark Richards
> > K1MGY
> >
> >
> >
> > -----Original Message-----
> > From: [email protected] [mailto:[email protected]]
On
> > Behalf Of Terry O'Laughlin
> > Sent: Wednesday, March 26, 2003 18:47
> > To: [email protected]
> > Subject: [R-390] powerline noise
> >
> > My QTH has a horribly high noise level starting from what appears to be
a
> > raspy fundamental that wanders between 400 and 450 kHz.  It persists to
> > well over 15MHz and has rendered all my shortwave radios essentially
> > useless.  It even overwhelms my R-390, R-390A and R-388 on a medical
> > isolation transformer circuit with a Kelvin ground.  My antenna ground
> > system is extensive as well.
> >
> > I tried tracking it down with my Sony 2010 and it seems to follow some
of
> > the power lines around the neighborhood.  But I can't pinpoint it.  I've
> > been assuming for 2 years the source is the aluminum recycler (smelter)
2
> > blocks away (the largest electrical user on the east side of town).  My
> > Sony 2010 detects little or no noise around the factory and tons in a
one
> > block radius of my house.  I assumed it was the recycler because the
noise
> > is often much lower or gone on Sundays.
> >
> > I let this go for a long time assume I couldn't get the Al recycler to
> deal
> > with EMI.  Now that it appears to be coming from somewhere else I want
to
> > nail down and get somebody to fix it.
> >
> > Any ideas?
> >
> > 73
> > Terry O'
> > WB9GVB
> >
> > _______________________________________________
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> >
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