[RFI] mystery noise

Larry Benko xxw0qe at comcast.net
Wed Jan 12 14:37:03 PST 2011


  Pete,

I agree with what Jim said but I would like to add another comment.  Any 
source that is Q5 at one location and unable to be heard at another 
location 200' away is DEFINITELY close to the Q5 location.  It would be 
humorous and slightly embarrassing if the power supply that runs your 
QS1R was the noise source.  My vote is for a small wall wart type power 
supply.

73,
Larry, W0QE


On 1/12/2011 12:50 PM, Pete Smith wrote:
> I have a small active vertical for my QS1R receiver, mounted on my
> garage roof.  Using the QS1R's panadaptor display, I can see that I have
> recurrent broad, strong noise sources every 54 KHz. When listened to on
> CW with a wide (10 KHz) filter they sound like a rough CW signal, and
> the waterfall shows definite pulsations.  I first noticed these on 160,
> and searching with the QS1R they appear to be pretty much gone by 5
> MHz.  I can provide a recording to anyone who wants one.
>
> Does the description or the periodicity suggest a source that I can look
> for?  It must be close, because my Beverage-on-Ground a couple of
> hundred feet away shows no trace.  The antenna is near the fence with my
> neighbors, so it would be helpful to know more or less wehat I'm looking
> for before I go over there.
>


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