[CW] OT: What do about Power Line Noise?

[D.J.J. Ring, Jr.]

Steve,

That is probably the best presentation I've ever seen on any subject.
Extremely well done.

I learned two additional tricks that I'll add here to supplement your
presentation in the "locating the noise section:

Tune a AM-FM larger size portable radio with a larger ferrite bar antenna
to a unoccupied frequency nearest 850 kHz as it seems that the receiver is
most sensitive to noise at that frequency.

When using this radio to triangulate the location of the offending noise
source, often the noise will peak around a cluster of possible objects:
example: the noise peaks around the electric service entrance in the
basement which is next to the oil burner and water heater which are all in
close proximity to each other and the offending noise is extremely loud.
It's here somewhere!

At this stage of noise detection, switch the receiver to FM, and extend the
telescoping whip, finding a frequency that's unoccupied by a station, and
move around with the whip trying to find a peak in the noise.  Usually an
FM receiver is designed to reject this type of noise until it is extremely
loud which it will be when it is nearest the noise source. In fact, when
you get within one or two feet, you will need to retract the whip to
continue to locate the noise. When the whip is fully retracted and the
noise is still extremely loud and you're still unsure of the noise source,
touch the whip to any metal of nearby objects, when you find the offending
object, like in my case, a defective doorbell transformer, the noise will
be overwhelmingly loud.

73

DR
N1EA

On Thu, Dec 23, 2021, 08:54 Steve WD8DAS via CW <cw at mailman.qth.net> wrote:

>
> Power line noise is certainly a problem, but I believe the more common
> source of radio noise is from *inside* our homes and offices.  Here's a
> link to a presentation I did on this topic and ideas on tracking down the
> offending devices...
>
> http://www.wd8das.net/Tracking-Radio-Noise.pdf
>
>
> Steve WD8DAS
>
> sbjohnston at aol.com
> http://www.wd8das.net/
> http://af4k-crystals.com
> --------------------------------------------------------------------
> Radio is your best entertainment value.
> --------------------------------------------------------------------
>
>
> ______________________________________________________________
> CW mailing list
> Home: http://mailman.qth.net/mailman/listinfo/cw
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:CW at mailman.qth.net
> CW List ARCHIVES: http://mailman.qth.net/pipermail/cw/
> Unsubcribe send email to
> cw-unsubscribe at mailman.qth.net
> Subscribe send email to cw-subscribe at mailman.qth.net
> Support this email list: http://www.qsl.net/donate.html
>
> =30=
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/cw/attachments/20211223/9df1a746/attachment.html>