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RFI

 

(@va6aktelus-net)
Joined: 10 years ago
Posts: 2
Topic starter  

Looking for help tracking down RFI on 20 meters. I thought it might be power line noise until I determined that it is only during daylight hours.  Completely gone until just before sunrise and lasts until just after sunset.  The problem is not through the whole band, the noise being about 5khz wide.  14.048, 14.080. 14.140, 14.140 etc. Noise signal level is 59 to 59+ The frequency changes somewhat as does the signal strength. As example very strong on 14.195 then after a few minutes moves from 14.195 to 14.177. Some noise at various other 20 m frequencies.  My 3 element beam is pointed 30 degrees north.  If I change the antenna 180 degrees south the noise disappears. Other bands have some of the same noise but a very low signal strength and not a real issue.

I live in Anders and wonder if anyone else is experiencing these type of noise issues, sounding like "sputtering" "frying".  

Attached an audio recording I made of the noise that is not 100% but gives an idea of what the interference sounds like.

Any suggestions or comments welcomed.

 

Neil VA6AK

 

 


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(@va6gmc)
Joined: 14 years ago
Posts: 2
 

Interesting Neil; sorry I do not have any suggestions, but will be watching to see how or if this resolves. 
73

VA6GMC

Greg


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(@ve6jhk)
Joined: 12 years ago
Posts: 9
 

Power line noise. Sometimes happens in Clearview as well. We should go on a power line bunny hunt some dark evening with a receiver, antennas, and binoculars to see if we can find hot taps, switches, and connections. If you have an infrared thermal imaging camera it would be helpful. 
Jim


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(@ve6jhk)
Joined: 12 years ago
Posts: 9
 

RE: RFI The other thing I had to do was run my cable line into the house through the entertainment center power bar to ground the shield. The power bar has the coax ground feature. It made quite a difference. VE6JHK


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