Hi Stan,
On 3/22/26 11:59 AM, Stan Stockton wrote:
> I’m not sure what you have up but I know you have some Yagi antennas. Those antennas should have pretty sharp nulls off the side. I would determine the general direction using the back of the antenna and then determine the exact direction with the side
null. If your antenna is pointed at 300 degrees, for example the null would be at 30 degrees or 210. Check it on a couple different antennas to see that they agree. Then I would plot the exact direction with a line on a mapping program. Depending on how
far away the source is you may have a line that goes right through the pole on the map. If you had a way to do something portable and have two lines from two starting points on the map, even better. You could then go out with a portable radio and directive
antenna, if possible, and confirm you have found it.
I can now actually hear it also on 6m. Unfortunately, there may be at
least two separate sources. One that gives a constant hum and the other
that is intermittent.
The hum is present on 160 but then dies off quickly, 80m hard to hear
and then it can again be heard on 10 and 6m where the background noise
is very low. So that leads me to think that it is located somewhat far
away. This source is east from me (based on my 6m beam heading), along
AR-115, which is about a mile away from me.
The intermittent source (knocking / clicking), is likely from the nearby
chicken house power line. But that that is west from me. Kind of hard to
locate exactly as it just disappeared again.
By the way, I found a nice way of tracking this on the radio. Set the
radio to AM and run wsjt-x on it. You will see (well, hopefully you
don't) nice lines of 60 Hz multiples. This is how I can detect it on 6m
with 6 el yagi. Otherwise it is hard to hear by ear on 6m (on 160m it is
loud).
Looks like I have some more driving to do. But there is definitely the
raspy hum at the chicken house power line.
Jussi (aa6kj)
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