Coil Size and Shape: The Key to Successful Metal Detecting
Coil Size and Shape: A Historical Perspective for Metal Detecting
Metal detecting has revolutionized the way we discover hidden treasures from the past. However, the success of metal detecting depends on various factors, including coil size and shape. Whether you are a seasoned detectorist or a beginner, understanding the importance of these features can help you improve your chances of finding valuable artifacts. In this post, we will explore coil size and shape through a historical perspective.
The earliest metal detectors were simple devices that used basic electromagnetic principles to detect metal objects buried in the ground. Most of them had circular coils with diameters ranging from 6 inches to 12 inches. These small coils were effective in locating smaller objects like coins and buttons but lacked the depth penetration required for larger targets.
With advancements in technology during World War II, metal detectors became more sophisticated and efficient. The development of pulse induction (PI) technology allowed detectorists to locate deeper targets with greater accuracy. However, these new machines required larger coils to achieve maximum depth penetration.
During the 1970s, manufacturers began experimenting with different coil shapes besides the traditional circular design. One such innovation was elliptical-shaped coils that could cover more ground than their round counterparts while still maintaining reasonable sensitivity levels.
Another popular shape was double-D or DD coils which consisted of two overlapping D-shaped windings placed parallel to each other forming an oval-like shape when viewed from above. This design helped eliminate unwanted signals caused by mineralization or trash while improving target separation capabilities.
In recent years manufacturers have experimented with more complex coil shapes such as concentric and spider web designs that offer improved sensitivity levels across all terrains while reducing interference from surrounding objects.
So why is it important to choose the right coil size and shape? First off choosing a large-sized coil means covering more ground per sweep; however, it comes at a cost whereby smaller items may be missed due to lower sensitivity levels compared to smaller coils. On the other hand, smaller coils are more sensitive to small targets but have a limited depth range.
The shape of the coil also plays an important role in target detection and discrimination. For example, DD-shaped coils are better suited for trashy areas as they can distinguish between multiple targets located close together while concentric coils provide excellent sensitivity levels across all terrains.
When choosing the right coil size and shape, it is essential to consider the type of terrain you will be detecting on. For instance, if you plan on hunting in highly mineralized soils or saltwater beaches, then a PI detector with a large elliptical or DD-shaped coil would be your best bet due to their superior depth penetration capabilities.
In conclusion, coil size and shape play an important role in metal detecting success. As technology continues to evolve, we can expect more innovative designs that promise even greater performance levels across all terrains. However, regardless of what design or style you go for always remember that proper technique and patience are key when it comes down to finding treasure!