When planning my retirement I purchased what is called a long-range locator planning to visit the old house sites in the area. It did seem to work in detecting gold and other precious metals but gave as many false indications as it did for valid targets. I spent several years working to improve this type detector. I finally settled on a portable, programmable 10 MHz programmable frequency generator as the most usable.
The advantage of using the frequency generator is it is
field selectable making it possible to check for several different metals with simple adjustments while in the field. The sensitivity is adjustable by varying the amplitude of the output waveform. The square wave output is rich in harmonics so possibly false positive readings can occur. These errors are usually obvious to the user. The applied frequency is a subharmonic of the resonant frequency of the target material and inversely proportional to the atomic weight.
Before the realization that dowsing is simply mass attraction it had become evident the rods I had constructed were far too sensitive for practical use. I decided to go with the conventional type dowsing rods using a sample of the actual target material to create the detector energy field with a heavier rod. After numerous attempts of constructing heavier rods I finally concluded I was going in the wrong direction. I needed lighter weight rods.
The rod pictured is my latest attempt as well as the most usable. By using a 3/16" dowel as the rod and making the handle as light as practical I have decreased the sensitivity by decreasing the weight. The 15" rod length with a slight weight added to the end in order to improve stability seems to be the best solution at this point. The overall weight is 12 grams including the handle and the sample vial.
The sensitivity is adjustable by moving the sample attached with a rubber band to a short length of heat shrink tubing. Least sensitive is with the sample further away from the handle and maximum sensitivity is with the sample attached directly to the handle.
In successfully using any of the dowsing types one has to understand many earth rocks contain small amounts of all the components found in meteorites. Also, over the past several million years we have had meteors of all sizes entering our atmosphere leaving probably several million miles of debris trails and millions of tons of debris. The combination of Earth rocks and meteorites create a noise floor that will make any overly sensitive detector useless. The rod has to operate above this noise floor in order to be useful.
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This is the latest prototype of the dowsing rods I have made. I have reduced the weight of the rod by using a 3/16" wooden dowel with a 15" length. The handle is made using a 3/8" plastic pipe with nylon flange bushings at each end. It seems to work better than previous rods and reduces the detection of the microscopic debris left by falling meteorites.