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2014-07-14, 16:00
(This post was last modified: 2014-07-14, 16:05 by Steve_Bell.)
Hi all,
New Forum member here thinking of building a station in Worcester, UK. (There's a nice hole in the grid that needs filling! :-)
HOWEVER... My house is around 100 meters or so from overhead power lines. Have a look at British post code WR5 3TD on Google Earth. ( http://is.gd/GDyHvW )
Look carefully, and you can see the lines and a shadow of the closest pylon alongside the main road to the West of us.
I am wondering if anyone else has any similar situation and what interference they have/have not experienced. I did email Tobias, who responded as follows:
"...we don't know whether it will work. It depends on the current and voltage through the line, your antennas, gain settings and so on. It might work, but only with some lower sensitivity. You can also ask in our forum whether other users have experiences in this."
So, that is what I am doing. Does anyone have any views as to whether this will be a problem or not?
Many thanks, all.
Steve Bell.
(2014-07-14, 16:00)Steve_Bell Wrote: Hi all,
New Forum member here thinking of building a station in Worcester, UK. (There's a nice hole in the grid that needs filling! :-)
HOWEVER... My house is around 100 meters or so from overhead power lines. Have a look at British post code WR5 3TD on Google Earth. ( http://is.gd/GDyHvW )
Look carefully, and you can see the lines and a shadow of the closest pylon alongside the main road to the West of us.
I am wondering if anyone else has any similar situation and what interference they have/have not experienced. I did email Tobias, who responded as follows:
"...we don't know whether it will work. It depends on the current and voltage through the line, your antennas, gain settings and so on. It might work, but only with some lower sensitivity. You can also ask in our forum whether other users have experiences in this."
So, that is what I am doing. Does anyone have any views as to whether this will be a problem or not?
Many thanks, all.
Steve Bell.
Here's a better picture showing the location of my house and the lines.
Posts: 635
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Hello,
As Tobias said, it is difficult to tell you if the station will work.
My station (733) is about 60m far from a powerline and it works fine (for me, maybe that the team would say not). I think that the voltage is 15kV (I can give that more accurately next week).
Maybe you can tell us more about that powerline. There should be some information on the pylon.
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2014-07-14, 17:15
(This post was last modified: 2014-07-14, 17:15 by Knickohr.)
Steve's powerline looks like a 110kV (or maybe more) intercity powerline. Heavy isolators between the lines and the electricity pylon.
Looks not really good. It's try and error.
Thomas
First station in Namibia (Southern Africa), look at #1305 !
Stations: 1006, 1305
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Could make a quick check by using an AM radio, and tuning off station, several places in the band... see if power line noise comes in... just make sure it's the HV lines causing it, not something else nearby...
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(2014-07-14, 17:24)Cutty Wrote: Could make a quick check by using an AM radio, and tuning off station, several places in the band... see if power line noise comes in... just make sure it's the HV lines causing it, not something else nearby...
I shall do that - and have a look at the pylon or enquire from the electricity company as to the voltage.
Thank you all for your help - I shall report back! :-)
Steve.
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(2014-07-14, 21:00)Steve_Bell Wrote: (2014-07-14, 17:24)Cutty Wrote: Could make a quick check by using an AM radio, and tuning off station, several places in the band... see if power line noise comes in... just make sure it's the HV lines causing it, not something else nearby...
I shall do that - and have a look at the pylon or enquire from the electricity company as to the voltage.
Thank you all for your help - I shall report back! :-)
Steve.
Steve,
I have a pylon line within 100m of me running in parallel with one of my antennae. I think that it may be 250kV. I am getting very reasonable results.
Chris
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For this type of problem (near high voltage power lines) what's the best system: H-Field or E-Field?
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(2014-07-14, 23:36)MeteoCercal Wrote: For this type of problem (near high voltage power lines) what's the best system: H-Field or E-Field? Depends on what the interference is... If it's mostly magnetic, then E field might be better. If it's electric discharge (arcing, corona etc) than perhaps neither. The filtering in E field is excellent for 50-60Hz and its harmonics, so it might be better in some cases. Shielded H field might have an advantage in other situations. If you're extremely close, you may be out of luck... No, "extremely" for me might be 25meters... for you it might be 100 meters.
Keep in mind, no one can say what the influence will be. There are too many variables. It took me two months to find the one sweet spot in my garage, out of the entire dwelling, that the H field would work with good effect, consistently. Most operators have to find the best 'siting' for there systems. You will also find that the environment will change seasonally, and during different types of weather. especially if you try to operate the system for 'long distances' rather than finding that 'happy zone'... of gains, thresholds, location, etc.
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2014-07-15, 00:58
(This post was last modified: 2014-07-15, 00:59 by MeteoCercal.)
Thanks for sharing your opinion and knowledge.
I took this topic to try to further clarify which system would be better in these situations.
Fortunately the location of my installation is virtually interference free. The nearest high voltage power lines are more than 2km away. There are no factories or industrial plants in the area, and the houses of the nearest neighbors are between 30 and 60 meters away.
I run an E-Field system, with relatively low gains, but only because I think here in Europe there are no great advantage to the network in having the system tuned to detect long distance strikes.
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2014-07-15, 01:05
(This post was last modified: 2014-07-15, 01:05 by cutty.)
(2014-07-15, 00:58)MeteoCercal Wrote: Thanks for sharing your opinion and knowledge.
I took this topic to try to further clarify which system would be better in these situations.
Fortunately the location of my installation is virtually interference free. The nearest high voltage power lines are more than 2km away. There are no factories or industrial plants in the area, and the houses of the nearest neighbors are between 30 and 60 meters away.
I run an E-Field system, with relatively low gains, but only because I think here in Europe there are no great advantage to the network in having the system tuned to detect long distance strikes. And that is good thinking.... we're all going to have to begin that attitude as the net grows, especially over here in the USA...
BTW... we have an extensive thread many North American folks use,.... http://www.wxforum.net/index.php?topic=20439.0
which talks a lot about interference... other discussions are randomly spread throughout the 'Blitzortung' board there on WxForum.net...
Everybody's welcome,.... can't speak for language difficulties, but there are good folks there....
Mike
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