[R-390] powerline noise

Wed, 26 Mar 2003 18:03:07 -0800

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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