Is it possible to shield a coil

[Back-of-the-boat]

Let me start out by saying I have no opinion on if you can or not but I was wondering if anyone thought it was possible to shield a coil from detecting above itself and to the sides with the technology we have today.



A man who ask's a question is a fool for 5 minutes the man who doesn't ask is a fool for the rest of his life.

 

Amazon Forum Fav 👍

A Handbook of Civil War Bullets and Cartridges - Grab it through Amazon!

[Old Dude]

IMO I really don't think you can. The coil is a multidirectional electronic component.

 

[Back-of-the-boat]

Thank you I was just wondering if any research or development was in the wind on this.

 

[Carl-NC]

Basically, no.

 

[happycamper08]

Really I would think it is possible. You can get directional transmitters for radios. I'm not sure what real advantage it would give you other than being able to detect closer to fences. If you want to do that just use a small concentric coil.

 

[steve1357]

Look at the frequency of radios and their antenna sizes. Look at AM radio stations near 1000khz having to use several towers to create directivity. Then consider the frequency of metal detectors which would need antennas 100 times larger. A reflector or director to create directional antennas at resonant VLF frequencies is impractical. The wound coils used as antennas on metal detectors are horribly inefficient to begin with. jmho

 

[jeff of pa]

the only way I can imagine would be with stationary metal.
the signal bounces off metal, it does not penetrate.

for a test, take Aluminum foil & Tape it fast to the top, & sides with Duct Tape.

When you turn it on, the detector should adjust if it has auto balance.

see where you can detect. & if you get extra depth on the bottom.

[only Caveat : I am no electronics wiz,
I have no idea if this will put undue strain on the system,
so if you do it, it is at your own risk ]

 

[Frankn]

I think the big question is why would you want to do this. I sometimes use the top of the coil or the hole to test a hand full of soil for metal content. Frank...

 

[Back-of-the-boat]

The reason I was asking this question is I have hunted around some baseball parks and have detected under the Aluminum bleachers and it wreaks havoc with all the metal above and around me even with sensitivity turned all the way down.The small bleachers I can tilt back and detect but it's the large ones that a person is able to walk under that give the problems.I find quite a bit under them but I know under the short seats there is more I can't get to.

 

[jeff of pa]

The reason I was asking this question is I have hunted around some baseball parks and have detected under the Aluminum bleachers and it wreaks havoc with all the metal above and around me even with sensitivity turned all the way down.The small bleachers I can tilt back and detect but it's the large ones that a person is able to walk under that give the problems.I find quite a bit under them but I know under the short seats there is more I can't get to.

when I had my WHITES 6000D I was able to search under many iron bleachers.
I still had to avoid tight spots, but did quite well at times.

I also used my S1 Probe on my Sovereign at times to get in tighter spaces.

Point being, an older less sensitive detector with a 8" (or less) coil may be a good
alternative for bleachers

 

[Treasure_Hunter]

I have used my detector pro uniprobe to hunt under bleachers and in tot lots close to metal poles many times with great success.

Sent from my Galaxy Nexus using Tapatalk 2

 

[Digger2]

Let me start out by saying I have no opinion on if you can or not but I was wondering if anyone thought it was possible to shield a coil from detecting above itself and to the sides with the technology we have today.



A man who ask's a question is a fool for 5 minutes the man who doesn't ask is a fool for the rest of his life.

It would have to be done in the design of the coil, as the receive section of the coil would view it as a signal.(probably an ol)

 

[Back-of-the-boat]

Thank you to everyone who responded.

 

[ArizFlash]

I remember back in the late 80's & 90's Jimmy Sierra selling the "Eliminator" coil which was made by Applied Creativity (Jim Karbowski) sane company that made the BigFoot coils. It was for the White's detectors. It was a small 6" coil that coukd be used next to chain link fences and under bleachers. There was a field test report in one of the treasure magazines thatcwas favorable but depth wasn't that great. The coil was about 2" thick and looked a little weird.

 

[Rawhide]

While a 5 inch coil would make searching under metal bleachers easier. Try just using your pinpointer.

 

[Frankn]

The reason I was asking this question is I have hunted around some baseball parks and have detected under the Aluminum bleachers and it wreaks havoc with all the metal above and around me even with sensitivity turned all the way down.The small bleachers I can tilt back and detect but it's the large ones that a person is able to walk under that give the problems.I find quite a bit under them but I know under the short seats there is more I can't get to.

Get a Vibra-tector. it has about a 3" coil and a pickup of about 6" It is waterproof as it is made for diving and vibrates to signal. It would work great. I use it for scanning walls in old buildings mostly. I think they cost about $180. Frank...

 

[metal mania]

Basically, no.

hi carl do you perhaps frequent another metal detector site where perhaps the threads are more technical in nature.

 

[Carl-NC]

hi carl do you perhaps frequent another metal detector site where perhaps the threads are more technical in nature.

Occasionally

 

[bzbadger]

I had same problem and decided to buy a sniper coil-4.5 inch and it did the trick. no more detecting the bleachers and the legs of it and I could put that little coil into just about any area and find stuff. For a small sum it actually paid for itself until I bought my ATP and found out the connections were different from the ace 350 sniper coil to the ATP.

 

[Dig-It-Scoops]

Anyone try the foil idea?