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Sunday, December 20 2020
There is truly no single “best” type of detector when it comes to gold hunting. But understanding the differences between a VLF (very low frequency) and a PI (pulse induction) detector and their coils can help you decide which detector might be the “best” to use in a particular situation. VLF metal detectors are the most common. It is a single or multi-frequency machine that consists of a continuous sine wave. Sine waves travel down into the ground to find a metallic target, and once it does, the machine charges the target, releases an eddy current, and sends back a signal. The PI metal detector is not a continuous sine wave. Instead, it pulses on and off and on and off. It “talks” and then “listens.”
A VLF machine can have an advantage on shallow and very small targets, on and off of bedrock— as long as you can keep it stabilized, ground balanced, and the sensitivity set properly. PI detectors generally do better at greater depths than VLF machines, especially in highly mineralized soils.
Mono coils are designed for PI detectors. There is a single winding inside the coil that puts a concentric pattern into the ground. You will always get more depth with a mono coil, but it is more susceptible to ground mineralization noise and it will be affected by the ground mineralization itself.
Double D coils work for both PI and VLF detectors. Double D coils have two back-to-back D shaped windings inside the coil. At all times the coils are transmitting and receiving across the plane of the coil. The Double D design is like a knife blade that goes into the ground down the center of the coil. These coils are great at handling mineralization where it essentially takes the ground mineralization and distributes it all the way across the blade, lessening its effects.
Concentric coils work with VLF detectors by using two separate windings inside the coil— one sends and one receives.
When it comes to a round versus elliptical coil, there is really no difference in the size, only shape. Coils are measured off of a round coil configuration. For example, a 14 x 10 inch coil will have the same attributes as a 12-inch coil. The key difference is that elliptical shapes work extremely well in difficult areas.
Although each metal detector has its pros and cons, you can’t go wrong by wearing the best headphones possible, no matter which brand or model you choose. Many gold nuggets you will find are only slight whispers in the detector’s threshold, so you want to always wear high quality headphones. Plastic scoops and a digging tool with a wide blade should also be in your accessory bag. When hunting, limit the amount of metal on your body, which includes wearing non-magnetic boots and belts. Put your car keys in your back pocket. Keep your cell phone in your back pocket, too, and make sure it’s off to avoid any interference.
Monday, August 06 2018
Back to School promo! Limited time only— combo price ends August 18, 2018! Each Teknetics T2 metal detector is now shipping with stereo headphones and a digger recovery tool. ALL FOR $499 with FREE SHIPPING! Buy now using coupon code A1486.
The T2 is a high-performance multi-purpose professional grade metal detector. This detector set the benchmark in advanced electronic technology and functional design in the metal detector market. Its legendary performance coupled with its light weight and perfect balance make the T2 the best metal detector in its price range.
The T2 excels at coins-shooting, relic hunting and gold prospecting.
Digger Recovery Tool:
Back-To-School Combo price ends August 18, 2018! Get the package for only $499 with FREE SHIPPING! Buy now using coupon code A1486.
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Friday, December 02 2016
Metal detectors are electromagnetic devices and can detect items that are conductive or magnetic, or both. Gold is an example of a non-magnetic conductive item. Iron is both conductive and magnetic. Almost all major advances in prospecting metal detectors over the last 40 years revolve around improving ways to ignore and see through ground mineralization while still finding gold nuggets. If you’re using any brand of VLF (very low frequency) metal detector to prospect for gold, choosing the correct operating mode (also called search mode) can make or break your success.
Experts recommend that any metal detector you are considering for gold prospecting should have a true all metal mode. This mode is important because of its lack of filtering applied to the signal. It will normally offer the best depth and the best sensitivity to small gold. Unfortunately, two common problems occur when using All Metal Mode: interference from ferrous iron and steel junk, and from hot rocks. A hot rock is nothing more than a rock that has a different magnetic content than the ground. Some rocks are that way because they contain conductive minerals besides gold. The Discrimination knob on your detector will help with these two problems.
Discrimination is a type of electronic filtering. The signal is analyzed, and depending on the discrimination setting, identified as either a target to be dug or a target to be ignored. Applying more discrimination eliminates more trash, but be careful—you don’t want to completely eliminate all ferrous trash because an aggressive level of discrimination easily tunes out gold. So be prepared to still dig ferrous junk which usually turns out to be larger chunks of steel and iron. Also know that discrimination circuits can be fooled, especially in ground with lots of iron mineralization. This ground condition can override the small gold signal and cause a faint gold signal to be identified as ferrous. Even with this limitation, the discrimination mode can be invaluable for finding gold in extremely trashy areas. Trashy areas are where a VLF detector can really outshine a PI (pulse induction) machine, especially when dealing with nails, bits of rusted cans, and other small trash. If you’re in the market for a metal detector, some manufacturers offer special holiday packages such as the 3 listed below. You can also shop for Fisher, Garrett, Bounty Hunter, Minelab, Tesoro and Teknetics metal detectors here.
Through Christmas only... FREE Recharge Kit and FREE 15” Coil and FREE Shipping with purchase of either Fisher F75 ($599) or Teknetics T2 ($499) detectors! Both machines are recommended for Coin Shooting, Relic Hunting, and Gold Prospecting.
Garrett AT Pro holiday package ($594.96) includes detector, headphones, instructional DVD,
Thursday, September 24 2015
Teknetics T2 is a multi-purpose high-performance computerized metal detector. When this detector was first released the price tag was $849 -- now it's only $499! It has the high sensitivity and ground cancellation features needed for professional gold prospecting, the discrimination responsiveness needed for serious relic hunting under difficult conditions, and visual Target-ID considered essential in searching for coins. The ground cancellation system can be adjusted to allow searching saltwater beaches.
This detector comes with an 11-inch elliptical Bi-Axial searchcoil for maximum detection depth in mineralized soils. An accessory bundle for the T2 includes a smaller coil, backpack, hat, and more is also available (additional charge). This machine is light weight and the best balanced of any high-performance metal detector, so you can hold and swing it almost effortlessly. The armrest position is adjustable to fit your arm. The grip is durable high-friction foam elastomer, comfortable in any kind of weather. The controls are conveniently located and easy to learn how to use. Locking collars on the tubes eliminate rattling. The entire menu is always visible on the LCD display. The LCD display indicates the electrical signature (Target-ID) of the detected metal object. The display provides continuous information on battery condition and on ground mineralization, which affects detection depth. Help messages are automatically displayed on the lower right corner of the display when necessary.
A great benefit of the Teknetics T2 is that it is easier to learn to use properly than other comparable metal detectors. A few of its best features inclue:
The T2 is powered by four AA alkaline batteries, which will typically last for more than 40 hours of use before needing replacement. The lead engineers on the design team were John Gardiner, firmware engineer, and David Johnson, whose expertise is behind many of the best-known high-performance metal detectors offered by major U.S. manufacturers for the last 26 years. 5 year manufacturer warranty from First Texas Products, LLC.
Most metal detectors, like the Teknetics T2, use VLF Induction Balance technology. Here’s how it works: The searchcoil (also called search head or loop) contains two electrical induction coils which are like antennas. One coil transmits a rapidly alternating magnetic field, illuminating the region surrounding the searchcoil. If metal is present, its electrical conductivity distorts the magnetic field. If iron metal is present, its magnetism also distorts the magnetic field, but in a different way, allowing the metal detector to distinguish between ferrous and nonferrous metals. The other coil is a receiving antenna which detects changes in the magnetic field caused by the presence of metal. Electronic circuits amplify this weak signal, analyze it to determine the changes which occur as the searchcoil sweeps over the target, and then convey the information to the user in the form of a visual display or audio tones. Most modern metal detectors perform many of these tasks in software running on an internal microcomputer. The iron minerals which are present in most soils also distort the magnetic field, obscuring the weak signals of small or deep objects. This can cause the object to go undetected, or to be misidentified when it is detected. Much of the technology that goes into modern metal detectors is devoted to the task of eliminating the unwanted signals from iron minerals in the soil, while not losing the signals from metal objects.
If you're considering a multi-use detector that's ideal for relic hunting, coin shooting, and gold prospecting, learn more here about Teknetics T2 Metal Detector and/or download the operating manual.
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