[Elecraft] Help identifying this RFI

[Brendan Minish]

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
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-- 
73
Brendan EI6IZ