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techniques Archive

Adding Tile GPS Key Finders on Metal Detecting Equipment

Somewhere in Jessamine County, Kentucky, there lies a Garrett Pinpointer.  Lost in 2012, it is surely ruined now by snow, rain and ice.  And perhaps was eaten or smashed by a cow.  Or something.  At $120 a pop, these things are not cheap – and losing something like this can disrupt our precious detecting time.

Calculating the Diameter of a Cannonball from a Fragment

Sometimes it’s hard to estimate the diameter of a cannonball with only a fragment, so here’s a quick way to calculate it using two rulers and a bit of geometry in just a few seconds.  After a while you’ll be able to just look at the fragment.  This does require a fragment similar to what