[Lowfer] 2200meter noise, plasma tv?

[Stan, W1LE]

Hello Dex,

Does the noise source have a direction ?

Is the noise there 24/7 or only waking hours ?   Quiet times when no one 
is home ?
Some units are always ON, to allow the appliance to respond to the 
infrared remote.

May have to start sniffing it out with a portable RX.

Inquire as to new appliance (TV) additions to the home.
Entirely power down the suspect home.
Watch out for battery backed up power systems for electronic items like 
computers and TVs.

Stan, W1LE     Cape Cod


On 11/28/2010 11:21 AM, Dexter McIntyre W4DEX wrote:
> Recently a noise has appeared on 2200 meters that I wonder if the source
> may be a new plasma tv in the area.  The primary signal I receive that
> generates noise over the 2200 meter band is about 125 kHz.  The noise
> extends up to about 138 kHz.  I've heard that plasma televisions
> generate a lot of broad band noise so this may be coming from another
> source, maybe a switching power supply?   My nearest neighbor is about
> 800 feet away but I've heard the sets can be heard over a mile away.
> Retailers appear to be dumping plasma sets which makes me paranoid.
>
> I've eliminated my house as being the source of this noise.
>
>
> mp3 of the noise at 125kHz:
> http://www.w4dex.com/lf/temp/2200m_growler/125khz_growler.mp3
>
> mp3 of the noise at 138kHz:
> http://www.w4dex.com/lf/temp/2200m_growler/138khz_growler.mp3
>
> SDR-Radio screen shot showing the strongest signal at 125 kHz which
> extends up to 138 kHz:
> http://www.w4dex.com/lf/temp/2200m_growler/2200meter_growler.jpg
>
> Dex
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