Q&A With Detector Designer Dave Johnson
September 2011 by Chris Ralph...it’s been a little known secret that one man was involved in designing many of the most respected very low frequency (VLF) nugget detectors on the market. Dave Johnson has designed gold-oriented detectors for Tesoro, Whites, Fisher and others for more than 25 years.
Potholes in bedrock can trap placer minerals and even be glory holes. They are, at least, interesting geologic phenomena, and at best, a treasure trove of gold nuggets.
While a large number of locations have yielded some placer gold, most of the state’s placer production has come from a few productive districts.
There are many smaller old hard rock mines out there—more than you might think. There are some small hard rock properties that are even open to be claimed if one does the right amount of research to find them.
It is not necessary to have a PhD in geology, but you need to know the basics, so that’s what I am going to try to dig into here—the understandable basics of these gigantic gold deposits.
The higher the sensitivity setting, the louder and sharper the signal from a gold nugget or other metal target.
Bela and Barbara Kovacs began prospecting for gold about seven years ago as a family orientated outdoors activity. A welder by trade and lured by the simple fact that beach sands can contain small bits of precious metals, Bela decided a few years ago to build a sand sucking contraption that can sift the shoreline for anything worth keeping.
I am going to break bedrock down a bit and explain my view of the varying scenarios I come across in the field.
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