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 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.     |
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