distance from power lines ?
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distance from power lines ?
the hill folk Sat Feb 01, 2014 11:45 am
Hey all....got my new 5000 and took it out to a friend's farm to play about.....just tested on lead at various sizes and depths.....good learning...was using mono and could not get it to run perfect smooth....there were 22000v lines about 250m away....is that close enough to still interfere ???
the hill folk- Contributor Plus
- Number of posts : 202
Registration date : 2013-01-27
Re: distance from power lines ?
Guest Sat Feb 01, 2014 12:36 pm
G'day the hill folk,
They can even pick up EMI from a storm 200 km away, but I have worked areas within 50 mts from power lines and not had any interference from them. Then there are days you can't get within 100 mts with out the EMI happening. It can be very frustrating sometimes.
Cheers.
Mike.
They can even pick up EMI from a storm 200 km away, but I have worked areas within 50 mts from power lines and not had any interference from them. Then there are days you can't get within 100 mts with out the EMI happening. It can be very frustrating sometimes.
Cheers.
Mike.
Guest- Guest
Re: distance from power lines ?
shelby23 Sat Feb 01, 2014 1:03 pm
I have a GPX 4500.
I went to close to big power towers near, Gympie, Queensland.
I blew 3 capacitors in the box.
$100 dollars later lesson learnt and post to Minelab service section they told me what I had done.
Regards Neale
I went to close to big power towers near, Gympie, Queensland.
I blew 3 capacitors in the box.
$100 dollars later lesson learnt and post to Minelab service section they told me what I had done.
Regards Neale
shelby23- Contributor Plus
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Registration date : 2009-01-25
Re: distance from power lines ?
Guest Sat Feb 01, 2014 1:27 pm
Thanks for that info Neale, the EMI generated from those high tension power lines can be very strong. I can still remember a favourite fishing spot which had these big power lines running near and there was a gate we had to go through to get there. Every time we went to open the gate, we would get a tingle from it. This was caused by the strong Electromagnetic Field coming from the power lines. 
Cheers.
Mike.
Cheers.
Mike.
Guest- Guest
emi
the hill folk Sat Feb 01, 2014 6:38 pm
Thanks all...I reckon that's it....a slight warble even when the detector is still can be nothing else can it.....
the hill folk- Contributor Plus
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Registration date : 2013-01-27
Re: distance from power lines ?
kiwijw Tue Jun 17, 2014 8:15 pm
Has any body else noticed that when detecting near high tension powerlines that if the wind is blowing towards you from the power lines there effect is a lot stronger & if the wind is blowing away from you & the powerlines then there effect is no where near as bad or even no effect at all? Cheers
JW
JW
kiwijw- Contributor Plus
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Age : 65
Registration date : 2010-09-02
Re: distance from power lines ?
geof_junk Tue Jun 17, 2014 10:21 pm
kiwijw wrote:Has any body else noticed that when detecting near high tension powerlines that if the wind is blowing towards you from the power lines there effect is a lot stronger & if the wind is blowing away from you & the powerlines then there effect is no where near as bad or even no effect at all? Cheers
JW
High-voltage systems cause a corona discharge. This creates objectionable or hazardous compounds, such as ozone, this a break down of the air and the ions will be blown by the wind causing a disturbance on your detector. Very high voltage system usually have corona ring to limit this.
geof_junk- Contributor Plus
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Registration date : 2008-11-11
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