Tesoro is the Spanish word for treasure. Founder Jack Gifford chose the name and the conquistador for the company logo over 20 years ago because, in Jack's own words: "As the Spaniards were yesterday's undisputed masters of treasure hunting, we at TESORO will always endeavor to meet our goal of making TESORO Metal Detectors today's undisputed masters of treasure hunting." Today, Tesoro Electronics remains a family business. Tesoro's lifetime warranty covers defects in material and workmanship for as long as the metal detector is owned by the original purchaser. Tesoro detectors are Made in the USA. Gold Rush Trading Post is not an authorized warranty center for metal detectors; products must be sent to the factory for repairs. To learn more about Tesoro's warranty and products, and to read customer testimonials and field tests, visit www.tesoro.com Click on metal detector photos below for more details and larger image.
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The searchcoil is a vital part of your metal detector. The type of searchcoil you should use is determined by what you're hunting and in what conditions. The size of a coil can influence the detection depth and sensitivity of a detector. Generally speaking, the larger the coil, the deeper it tends to detect, but with less sensitivity to smaller targets. The smaller the diameter, the more sensitive it becomes, but with reduced detection depth. Smaller coils are lighter in weight, easier to control, and may be chosen for their ability to negotiate difficult terrain or undergrowth. Smaller coils also have a target separation advantage in areas of high trash, due to their smaller detection footprints.
Is a crystal-controlled metal detector better than one that is not crystal-controlled?
Most metal detector manufacturers use crystal resonators in their machines because of the tight tolerances of the resonator. If the part is listed as 15.7 kHz, all parts will be exactly that frequency. The downside of these super tight tolerances is that the detectors are more likely to crosstalk with each other. In other words, the transmit and receive signals from two or more different machines will start interfering with each other.
Tesoro metal detectors use an LC or tank circuit to generate operating frequency. A capacitor and an inductor are paired together and create a naturally occurring efficient frequency. Variation in the capacitor and inductor cause slight variations in the operating frequency, which reduces the likelihood of crosstalk with other Tesoro metal detectors. The variation is small enough that it does not affect the performance of the detector.
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