Minelab Detectors and Search Coils

Thinking about upgrading your search coil? Are you unsure of whether to buy the 15″ round or the 17×13″ elliptical. They are both good coils, but with some very slight differences, so I decided to do a video so you can see for yourself. On the two targets tested, the 5000 with 15″ round in Fine Gold gave the best response, and a very close second was the 17×13″ in Enhance on the 4500.

Minelab Detectors and Search Coils

From Wikipedia, the free encyclopedia:

Coil designers also tried out innovative designs. The original induction balance coil system consisted of two identical coils placed on top of one another. Compass Electronics produced a new design: two coils in a D shape, mounted back-to-back to form a circle. This system was widely used in the 1970s, and both concentric and D type (or widescan as they became known) had their fans. Another development was the invention of detectors which could cancel out the effect of mineralization in the ground. This gave greater depth, but was a non-discriminate mode. It worked best at lower frequencies than those used before, and frequencies of 3 to 20 kHz were found to produce the best results. Many detectors in the 1970s had a switch which enabled the user to switch between the discriminate mode and the non-discriminate mode. Later developments switched electronically between both modes. The development of the induction balance detector would ultimately result in the motion detector, which constantly checked and balanced the background mineralization.

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