[Elecraft] Incredible noise tornado on 16om

[Jim Wiley]

It is also characteristic of the RFI produced by "touch control" 
devices, as used for lamps and such.   Have you  powered  down various 
circuits in your home to see if one of them is the culprit?   I have had 
touch-control RFI from as far away as several houses distance.  Another 
source of this type noise is proportional-control aquarium tank heaters, 
also battery chargers.  Drifting frequency is often a give-away of 
interference from a touch-control device. 


Can you hear it on a battery powered portable AM radio?  If so, try 
walking around your house and around your neighborhood.  The loop 
antenna inside the radio will give  good directional indication when 
pointed at or 180 degrees away from the noise source.  Test on an AM 
radio station of known direction (preferably from the next town) to get 
an idea of how to interpret loop patterns. 


Let us know what you discover


- Jim, KL7CC



riese-k3djc at juno.com wrote:
> I see the same thing on 75 and it tends to drift and appears every 10 Kh
> or so
> )(#$*%_)(#&*% switching powersupplys
>
> sounds like power line noise
>
> Bob K3DJC
> On Wed, 09 Nov 2011 16:29:16 -0800 Vic K2VCO <k2vco.vic at gmail.com>
> writes:
>   
>> Has anyone ever seen anything like this? It seems to be there 24-7.
>>
>> <http://www.qsl.net/k2vco/160noise.jpg>
>>
>> Another view with a wider span:
>>
>> <http://www.qsl.net/k2vco/160noise1.jpg>
>>
>> -- 
>> 73,
>> Vic, K2VCO
>> Fresno CA
>> http://www.qsl.net/k2vco
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