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Miner John Designs TDI Coils and Accessories


Welcome to Miner John Designs! Your coils and metal detecting accessories headquarters!


ANNOUNCEMENTS - 9/25/2017 - Hello, Everyone!  We are preparing for our upcoming Fall Sale and wanted to make sure you knew about it.  Check back soon to get what you want at a great deal!  And thank you for being a Miner John Designs customer!

  - A great new design that protects your investment! Inside padded with denim outer, they keep the control box from getting beat up every time you set your detector down to dig a target.  A great fit with velcro straps to keep it snug. Four colors available including Black.
NOTE:  The cover straps have been changed from 2" inch wide to 1" wide to clear the controls and switches better.

Featured Products


  • "The 8.5 x 11 mono is a great all around coil for relic hunting. its shape is great for hunting in the woods and gets better depth than the stock TDI coil. The weight is practica..."
    James Bibb
    Relic Digger
  • "A pleasure to deal with, good, honest professionals who know their stuff"
    Peter Erwin

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