Hi I am new to the Xterras I am getting the X 705 and am going to Florida over Jan. I am a bit confused that the 18.75 kHz concentric coil is waterproof but in salt water will not be as effective as a DD 18.75kHz coil which is water resistant? due to minerals condition? could Someone please advise to which type coil one would select to work the waterline 2 - 4 inches in water? but mostly beach in general I was thinking the Concentric coil being it is waterproof but then, what about the salt water???
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Xterra Coils
- Thread starter Enrique
- Start date
Unless you are going to be detecting some seriously mineralized beaches, either will be fine. The concentrics are waterproof and will not float up on you, (unlike the elliptical) when hunting in a few inches of water. The DD design is better suited for highly mineralized soils or sands. But as you said, is not waterproof. (and it is heavier) Frankly, I'd put on the stock coil that came with the detector, knowing you are going to have as much fun as if you had all the coils. As I've said many times, all the frequencies can detect ferrous and conductive metals. Just remember to rinse off the coil and rod with fresh water after each hunt. And if it were mine, I'd put a zip lock bag around the control housing, just in case I didn't see that wave in time!
Maybe some of our Florida beach hunters will chime in with what coils they prefer. HH Randy
Maybe some of our Florida beach hunters will chime in with what coils they prefer. HH Randy
I would like to know, on the beach, would a HF(18.75 kHz) detect a very fine gold chain, fine-small gold ring, or small gold earing (to what degree)how much better-deeper than a MF(7.5 kHz)== in either a 10.5" DD or 9" Concentric Coil? Only a little better or alot better? Thank you.
P.S. I would like to know the answer to this because I am getting a round 10.5" HF DD next month. Is anyone using this coil for finding gold jewellery-beach work or for gold prospecting?
X-Terra coils.... water proof vs water resistant......from Minelab USA
http://www.findmall.com/read.php?55,1068029,1068029#msg-1068029
Definitions:
Water resistant: May be splashed, washed, used in drizzling rain, or moved through wet grass. Must not be submersed under water.
Water proof: Submersible to 1 meter. Ideal for shallow water wading and gold prospecting in shallow streams.
9 Concentric
7.5 kHz Coil
All X-TERRA series detectors
Water proof
The standard X-TERRA coil for good reason good depth, great target separation and accurate pin-pointing the perfect coin hunting coil.
9 Concentric
18.75 kHz Coil
X-TERRA 50, 70, 305, 505 and 705 detectors
Water proof
Has same properties as the 7.5kHz version, but more sensitive to low conductive targets. Also performs well when detecting for jewellery on ocean beaches.
10 Round Double-D
7.5 kHz Coil
All X-TERRA series detectors
Water resistant
For improved depth and ground coverage over the standard 9 Concentric, this is the coil to use. It also performs well in mineralised soils.
10 Round Double-D
18.75 kHz Coil
X-TERRA 50, 70, 305, 505 and 705 detectors
Water resistant
An ideal coil for beach work, and open areas, this coil offers good depth and sensitivity, and great stability in mineralised soils and beaches.
10 x 5 Double-D
18.75 kHz Coil
X-TERRA 50, 70, 305, 505 and 705 detectors
Water resistant
This coil has great sensitivity, good ground coverage, and is easy to use in rough terrain. An ideal gold hunting coil, that also performs well for beach work.
P.S. I would like to know the answer to this because I am getting a round 10.5" HF DD next month. Is anyone using this coil for finding gold jewellery-beach work or for gold prospecting?
X-Terra coils.... water proof vs water resistant......from Minelab USA
http://www.findmall.com/read.php?55,1068029,1068029#msg-1068029
Definitions:
Water resistant: May be splashed, washed, used in drizzling rain, or moved through wet grass. Must not be submersed under water.
Water proof: Submersible to 1 meter. Ideal for shallow water wading and gold prospecting in shallow streams.
9 Concentric
7.5 kHz Coil
All X-TERRA series detectors
Water proof
The standard X-TERRA coil for good reason good depth, great target separation and accurate pin-pointing the perfect coin hunting coil.
9 Concentric
18.75 kHz Coil
X-TERRA 50, 70, 305, 505 and 705 detectors
Water proof
Has same properties as the 7.5kHz version, but more sensitive to low conductive targets. Also performs well when detecting for jewellery on ocean beaches.
10 Round Double-D
7.5 kHz Coil
All X-TERRA series detectors
Water resistant
For improved depth and ground coverage over the standard 9 Concentric, this is the coil to use. It also performs well in mineralised soils.
10 Round Double-D
18.75 kHz Coil
X-TERRA 50, 70, 305, 505 and 705 detectors
Water resistant
An ideal coil for beach work, and open areas, this coil offers good depth and sensitivity, and great stability in mineralised soils and beaches.
10 x 5 Double-D
18.75 kHz Coil
X-TERRA 50, 70, 305, 505 and 705 detectors
Water resistant
This coil has great sensitivity, good ground coverage, and is easy to use in rough terrain. An ideal gold hunting coil, that also performs well for beach work.
I just found this after, Randy answered my question here. This is worthy of a repost as it is so good:
6inch 18.75Khz search coil question
http://www.findmall.com/read.php?55,1110222
Theoretically, the lower frequency coils are best suited for higher conductive targets such as silver and copper. And higher frequency coils are best suited for lower conductive targets such as gold. But in my opinion, there isn't enough difference between 3 kHz - 7.5 kHz and 18.75 kHz to show an appreciable difference in depth or ability to hunt coins and jewelry. Any of the three frequencies will find just about anything metal, regardless of the conductivity. I see more of a difference in the audio tone produced than I do the actual detection. So if I were hunting the beach, and had to have a waterproof coil, I'd probably opt for the 6 inch DD at 18.75. Excellent separation and surprising depth. The downside is that the small coil doesn't cover much sand in each sweep. If I already had a larger DD coil, as you indicate you have, I'd probably buy a tube of silicon sealant and seal the coil seam, as well as put a glob on where the cable enters the coil. Since the plastic used in all the coils is the same, I'd have to surmise that the seams and cable entrance are the two vulnerable spots. If I were going to purchase another coil just for beach hunting, I'd probably buy the elliptical 6 X 10 and seal it up as described. It will cover more ground with each swath (compared to the 6-inch), it is lightweight and easy to swing. And, having that higher frequency in a DD design isn't going to hurt a thing while hunting the beach. JMHO HH Randy
Silicon sealant will adhere well, yet remain flexible. (necessary if you experience torque on the coil or pressure on the cable) The epoxies I've used for other projects are not flexible. Regardless of what you chose, know up front that Minelab is not obligated to warrant a coil that has been modified or is used under circumstances it is not designed for. JMHO HH Randy
6inch 18.75Khz search coil question
http://www.findmall.com/read.php?55,1110222
Theoretically, the lower frequency coils are best suited for higher conductive targets such as silver and copper. And higher frequency coils are best suited for lower conductive targets such as gold. But in my opinion, there isn't enough difference between 3 kHz - 7.5 kHz and 18.75 kHz to show an appreciable difference in depth or ability to hunt coins and jewelry. Any of the three frequencies will find just about anything metal, regardless of the conductivity. I see more of a difference in the audio tone produced than I do the actual detection. So if I were hunting the beach, and had to have a waterproof coil, I'd probably opt for the 6 inch DD at 18.75. Excellent separation and surprising depth. The downside is that the small coil doesn't cover much sand in each sweep. If I already had a larger DD coil, as you indicate you have, I'd probably buy a tube of silicon sealant and seal the coil seam, as well as put a glob on where the cable enters the coil. Since the plastic used in all the coils is the same, I'd have to surmise that the seams and cable entrance are the two vulnerable spots. If I were going to purchase another coil just for beach hunting, I'd probably buy the elliptical 6 X 10 and seal it up as described. It will cover more ground with each swath (compared to the 6-inch), it is lightweight and easy to swing. And, having that higher frequency in a DD design isn't going to hurt a thing while hunting the beach. JMHO HH Randy
Silicon sealant will adhere well, yet remain flexible. (necessary if you experience torque on the coil or pressure on the cable) The epoxies I've used for other projects are not flexible. Regardless of what you chose, know up front that Minelab is not obligated to warrant a coil that has been modified or is used under circumstances it is not designed for. JMHO HH Randy