This sounds like power-line noise the trick to locating it is to work upwards in frequency as you close in on the source, I have had great success in locating power-line noise by closing in on it on 6M in my van then finding it on 2m as you get closer then finally on 70Cm
For 2M/7Cm I use either an FT817 in AM mode or my VX7r Hand-held in AM with an arrow 2m/70Cm hand-held Yagi Use logic and method to close in on the source and don't make any assumptions about the faulty hardware on the power company side. For example some Hams have in the past (after locating the approx location) told the power company that it's a 'faulty transformer' Replacing the transformer has in some cases resolved the issue BUT only because the replacement process meant that all the loose hardware is now done up nice and tight.. By the time you get to 70Cm you will be very close to the source and can probably narrow it down to a pole with a small directional antenna Some may suggest hitting the suspect pole with a big hammer, Don't do that! It's dangerous (faulty hardware may result in the line falling ) and it's imprecise the ARRL have some very good info on location powerline noise and the causes which may help your CO-Op 'rooke' better understand the issues Here http://www.arrl.org/power-line And particularly here http://www.arrl.org/power-line-noise-mitigation-handbook-for-naval-and -other-receiving-sites The better job we do on narrowing down issues leads to better relations with the power company. In a few cases here In Ireland we have been the early warning system for things that were potentially dangerous faults and as a result we now have a good working relationship with the Irish power utility Hope this helps 73 Brendan EI6IZ On Wed, 2015-07-01 at 15:31 -0700, Wes (N7WS) wrote: > I've uploaded some videos to YouTube that show the problem I'm > having. This is > my first attempt at using YouTube and my first use of the video > feature of my > new Sony A6000, so bear with me. > > The link is here: > https://www.youtube.com/channel/UCpl3gFMWg58kn7afp_K5c6A > > What these show is the noise that is wiping out my HF/6M operations. > This stuff > covers the complete spectrum from 160 to 6 meters. I'm in semi-rural > location > and have walked about a 1/2 mile in all directions with a Sony ICF > -SW7600GR > receiver, using the telescoping antenna and cannot pinpoint a > location. My > power company (co-op) is trying to be helpful, but the knowledgeable > guy has > left the company so I'm dealing with a rookie. > > Furthermore, in addition to the short-term, cyclic intermittency (5 > -10 minutes) > evident in the videos, there can be longer term periods of quiet, > which Murphy > dictates occur when the power company guy is looking for noise. > > I'm hoping there is some expert here that can point me in the right > direction. > > Wes N7WS > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] -- 73 Brendan EI6IZ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
