Topband: Bizzare EMI Story

[Paul Mclaren]

I have found that the continuous transmission of FT8 on 160m resets my
wireless bridge back to default config.

Regards

Paul MM0ZBH

On Wed, 7 Nov 2018 at 15:46, Ted K2QMF <k2qmf at juno.com> wrote:

>
> If it were me, I would get joy out of smashing it !!!
>
> On Tue, 6 Nov 2018 21:15:35 -0500 "Sam Josuweit" <samjos at epix.net>
> writes:
> > So after taking a few years off from radio, over the summer I decided
> > to
> > rebuild my station and antennas and get back on the air. Was doing
> > fine
> > until a few weeks ago, my noise level was S9 on 80 meters. Using a
> > beverage
> > it was ok but on my TX antenna it was 120hz hash. I tried everything
> > to
> > locate the source, unplugged computers, Directv, DSL modem, freezer
> > you name
> > it, checked my entire ground system, it still was there. To make
> > matters
> > worse after listening to it on AM I noticed I could hear the local
> > NOAA
> > Weather radio station, which is on 162.55 MHZ FM! Now the local
> > transmitter
> > for NOAA is on the next mountain over and line of site with my
> > remote QTH,
> > but 162MHZ to 3.7MHZ?? This really had me stumped, and I was just
> > about to
> > give up. I have an old farm house and don't have too many power
> > outlets, but
> > I realized I missed checking the one in our bedroom, and there sits
> > my NOAA
> > weather alert radio. Unplugged it and the hash was gone. Since these
> > radios
> > monitor constantly for alerts, they must just mute the audio when
> > not in
> > use. Apparently something in the radio power supply failed causing
> > the power
> > noise, which was then getting modulated by the muted audio. This
> > was
> > propagating thru my whole electrical system. I'm just glad I found
> > it.
> > Debating if I should take a look at the weather radio or smash it
> > with a
> > sledge hammer.
> >
> >
> >
> > Sam (N3XZ)
> >
> >
> >
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