Curious ? - Grounding to the sea

[Anonymous]

I just read a forum msg about a stainless post sticking out of a coil that grounds an underwater detector to the sea, reducing noise. I also remember reading a paper on sheilding which would support this.
Question: Would a land machine benefit from improved grounding also? This has me thinking.

 

[Anonymous]

Charles.
Some of the land units are grounded threw their coil, with the use of conductive coil housing materials. A lot of the coils are shielded internally with the respect of taking care of static discharge from the grass.
With the stud mount in the Aquastar II coil, the grounding is completed from it

 

[Anonymous]

Some areas I hunt are noisy, and some days are worse than others. It seems to me all that shielding would be more effective with a better ground. I don't think my detector grounds through the plastic coil cover...I may have to experiment with this, maybe a walking stick with a ground rod on the end connected to the ground on my detector and see if this quiets it down.

 

[Anonymous]

Maybe I can add some insite to it. So we don't tie the forum up on non-PI issues, please email me at: wcrabtre@cape.com
Bill

 

[Anonymous]

Hi Charles,
This is an area for further investigation. Grounding is much more difficult on land, than when the coil is immersed in conductive water. Even a conductive plastic shell will only ground intermittently and this may be worse than no grounding at all.
I certainly noticed rf noise decrease significantly when grounding a large coil at the coil end, although this was before I used as effective a Faraday shield as I do now. Grounding at the electronics end of the cable seemed less effective.
Eric.