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Sand Shark and small gold chains

D

dc426

New member
I bought my wife a small gold chain for Christmas and decided to do a test to see if the SS could detect it. Guess what? Nothing! not even the 18K diamond cross pendant that was on it. This has me thinking I must be missing a ton of stuff out there. Any ideas on this? I wonder why it's not detecting it.
DC
 
I too would like some info on this. I've had the Sand Shark for several wks now and have found plenty of trash i.e pop tops, tent spikes, screws and the like. I have five hunts on several beaches here on the west coast of Florida and I work both the water and the dry sand areas. The SS has no problem with dimes pennies nickles and quarters no matter how deep. After reading the post by DC I also tried a test at home with different jewelery. For the most part as I had expected any ring or bracelet in my wife's jewelery box made quite the sound under the 8" coil. However there was two small chains very thin that the detector was not sounding on. Also one 14k straight pendent about 1/2 " in length that made no sound. Now, I hunt with friends one with a whites pi and the other with an excal 2. None have found anything other than what I mentioned above I believe we just haven't gone over something of value yet. But after the little test at home I too wonder if something has been passed over. Any thoughts from those more trained with Tesoro equipment mainly the Sand Shark? Alpaca Guy
 
First is it white gold? White gold is hard for the detector to see do to the impurity. Secound 8 or 10 inch coil? Smaller coils hit smaller stuff better. Chains and very small gold are tough for any detector. Third PI's do not air test good. Just like the newer detectors see better when target are in the ground for a bit. I have a SS and found I like the f set better than the vco. I also found running the volume at 3/4 takes out some of the extra back ground noise. The other thing is play with the width. Just read (by Reg Sniff) a artical on the pi or tech. forum about width. Try lowering it to about preset. The high will give you more depth on larger target.The lower better on small target but not to low you will lose overall depth. Anthor place to get good info on PI' s is nuggetshooter.com. Look under articales for "Understanding PI" there is a part 1 and 2. They are also by Reg. Any machine made to handle salt conditions have a harder time hitting very small gold but understanding the technology and you becoming one with your machine will help you get the small stuff better. Merry Christmas and good hunting,Joe
 
Sand Shark is not alone in not being able to see small gold or very fine chains of either silver or gold. Detectors I have that ignore the small chains that my wife has include the CZ6a, CZ20, Sand Shark, Excalibur and HH Pulse (that means essentially all of my beach detectors). In all metal mode the CZ's and Excal are a little better than either of the pulse induction detectors on the very small link chains, but not by much.
tvr
 
Can't say that happens with the BHID 300. AS IT has hit rather well in AM mode on small gold , including split shot.

One thing I can say tho is that I have had a tiger shark and the tiger shark hit rather well on small gold rings but just wasnt the type of water unit I was looking for.
 
Chains do not detect well because of the loose electrical conductivity between each link; The metal detector more or less only sees one link, so if the links are tiny then they will be difficult to detect. Even large links that have a split end in each link will also be difficult. Any ring or chain link that is brocken will not produce strong Eddy current magnetic fields and will create much weaker signal responses than those rings and links that are solid without breaks

VLF metal detectors respond much better to chains than PI units because the VLF is running at a higher frequency than most PI units and as a result they generate larger more concentrated eddy Current magnetic fields around each link that the RX ccts can respond to..

PIs operate in the 100hz to 1000hz range and the extremely small eddy current magnetic fields generated by these signals are difficult to detect electronically and require quite tricky circuitry in order to process them.The BHID is VLF and operates at 2 frequencies , 3khz & 15 khz the 15khz tx signal creates a good response to small chains. as does the 12.5khz sig from the VLF Tiger Shark.. The Excal operates over a very wide frequency range which allows it to respond reasonably well to small chains.

The high frequency detectors that operate in the 17khz to around 70khz give excellent response to very small bits of metal but tend to not detect deep in the more highly mineralised grounds.
 
Great info thanks for posting. I wish bobby pins were made out of gold. I would be rich.
 
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