Electronic 'mosquitoes' (RFI producers) make wonderful objects for target
practice....
Dave - WØLEV
On Wed, Nov 7, 2018 at 4:41 AM Mike NA6MB <na6mb.mike@gmail.com> wrote:
> I vote hammer !
>
> NA6MB
>
>
>
> On 11/6/2018 7:30 PM, donovanf@starpower.net wrote:
> > From: "Sam Josuweit" <samjos@epix.net>
> > To: topband@contesting.com
> > Sent: Wednesday, November 7, 2018 2:15:35 AM
> > Subject: Topband: Bizzare EMI Story
> >
> > 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)
> >
> > _______________________________________________
> > RFI mailing list
> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
>
> --
> Thanks,
> Mike
> NA6MB
>
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>
--
*Dave - WØLEV*
*Just Let Darwin Work*
*Just Think*
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|