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Metal Detectors
Detector Accessories
18" coil choice information and questions
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<blockquote data-quote="mbasko" data-source="post: 433297" data-attributes="member: 4485"><p>Your GPX standard lower shaft should be non metallic I.e. a fibreglass type shaft?</p><p>Some people using larger coils will replace the stock upper shaft, which is aluminium, with a fiberglass or carbon fibre upper shaft. Normally the aluminium upper shaft won't pose a problem as it moves with the coil & is far enough away but when using 18-20" plus coils people have found there can be some effect on sensitivity with the detector compensating for the upper shaft.</p><p>When doing this they will usually also replace the standard non metallic lower shaft at the same time with the same brand lower shaft with the thought process of these fibreglass/carbon aftermarket shafts being lighter.</p></blockquote><p></p>
[QUOTE="mbasko, post: 433297, member: 4485"] Your GPX standard lower shaft should be non metallic I.e. a fibreglass type shaft? Some people using larger coils will replace the stock upper shaft, which is aluminium, with a fiberglass or carbon fibre upper shaft. Normally the aluminium upper shaft won't pose a problem as it moves with the coil & is far enough away but when using 18-20" plus coils people have found there can be some effect on sensitivity with the detector compensating for the upper shaft. When doing this they will usually also replace the standard non metallic lower shaft at the same time with the same brand lower shaft with the thought process of these fibreglass/carbon aftermarket shafts being lighter. [/QUOTE]
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Metal Detectors
Detector Accessories
18" coil choice information and questions
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