Quote:
Originally Posted by gold24h
very interesting,i can not remember the whole post but there was some talk of measuring voltages on the rangertell while looking for targets,the voltage was suppose to go from o millivolts with no target to as high as 5 millivolts if picking up a targett,do you have any information about how to hook up the meter to do that.
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Hi gold24h,
I actually spent a lot of time testing for changes that happen when a target is placed within the claimed detection range.
What I discovered is that there is no change in the noise signals that can be measured on the Examiner antenna with my equipment when a gold, silver, or copper target is placed at different distances from the Examiner.
To understand how this testing was conducted, I made two types of tests:
In one case I started out in a test field which I first checked to insure there was no buried metal, then I would bury a gold, silver, or copper sample in one of several holes 2" deep that were spread out at various distances from the location where a volunteer held the Examiner.
After this testing was done, it was done again at the beach where no holes were used, and the samples were pushed under dry sand, then the test was repeated under wet sand.
The samples were a gold ring, a silver ring, and a 1/4 inch length of 1/2 inch copper pipe that looks like a ring.
The measuring was done with a Fluke 187 meter and an old Textronix 442 oscilloscope powered by an inverter connected to the car battery.
There was no measurable change in the noise signal measured on the Examiner antenna.
It did not matter what numbers were entered into the calculator.
The only change I could see was if the calculator was turned off, then the calculator clocking signal part of the noise disappeared.
After conducting these tests, it became apparent that there were problems related to interference with the noise signals we were measuring.
When a second person was walking in the test field near the Examiner, he could act as an electrical noise collector and influence the noise that you measure on the Examiner antenna.
We saw that the second person should not be moving near the examiner during the testing.
And we saw how the noise signal also changes as you walk around holding the Examiner.
In order to be able to watch a signal change as a target comes into range, we figured the best method would be to tie the target to the end of a fishing line and get an assistant who is standing far away from the test area to slowly move it closer to the examiner.
That is how the second class of tests were done.
As the rings were dragged from about 100 feet distance to the point where they touched the feet of the person holding the Examiner, we were able to detect no change in the noise signals on the Examiner antenna.
At the end of this test, we also tried dragging a 5-foot length of 2" diameter copper pipe past the examiner. -- Still no change in the noise signal seen as the pipe was dragged past the Examiner.
Later I made a lot of tests indoors moving targets tied to a string close to the examiner until they were within inches of the antenna.
Again, I could see no change in the signals I measured when the gold, silver, copper and various other materials were moved around the room.
When I saw that there was no change in the signals I measured, regardless of what key codes were entered into the calculator, I stopped making target tests, and started looking for other things that would change the signal measured.
All of the tests I made are repeatable by anyone who has an Examiner. You can try it yourself and see the same results that I saw.
If you find different results which show the signal changing when the target is near, I would be interested to know how I can duplicate your measurement to find the same detection signal as you find.
From what I have observed so far, it appears the Examiner does not detect anything except broadband airborne noise including the calculator clocking noise, which you can detect just as well with a coat hanger wire and a suitable instrument to observe the noise. I also have observed that nobody who tried to use the Examiners I tested was able to find hidden treasures with it.
Best wishes,
J_P