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Old 08-07-2014, 08:35 PM
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dR-Green dR-Green is offline
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Join Date: Apr 2008
Location: Wales, UK
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"Total number of turns = 20" means exactly what it says. 20 turns in total on the coil.

The 20% is in reference to the height/length to diameter ratio of the coil. The coil is 20% high as it is wide. If diameter = 100cm then height = 20cm.
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