Topband: Power Line Noise

[Herb Schoenbohm]

steve.root at culligan4water.com wrote:
> So Old blue helped find noise sources that were a mile and a half away? I can't begin to tell you all how discouraging that is....
>
> The noise here is incredible. The K3 noise blanker, set to it's most aggressive level, has no effect on it. I spent a year experimenting with the MFJ-1026 and never was able to achieve any kind of a null, much less one that improved S/N ratio. The noise sounds like a waterfall, it has no discernable characteristics when seen on a 'scope. 


Steve,

Maybe more of us could help if you made a .mpg recording of the noise 
with the RX in the AM mode and with a 9Khz B/W and then post it on a web 
site where we all can listen to it and see if we can provide any clues 
to what could produce this noise. I am certain there is some noise 
sleuth out there that has heard this type of noise before and can 
provide a few clues which will narrow down the search.  Additionally you 
should cut the main breaker going to your house while having your 160 
meter radio power by a DC source.

Are you near an industrial area? Are there any oil fired furnaces 
nearby?  Start you own check list and determine items like time and 
temperature.  If none exists it eliminates potential sources and gives 
credence to other possibilities..  Just don't give up as it can be 
found.  An aircraft capable scanner (AM mode) with a small Yagi can be 
very helpful in DF'ing multiple source noise, sometimes better than an 
ultra-sonic detector.

Merry Christmas and I hope a solution is under the tree this year,

herb Schoenbohm, KV4FZ