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  • #16
    Originally posted by goldfinder
    The medical use is fine and I believe it has helped my wife and some other people I know - however, this being a alternative aspect of long range detection -

    Lets get back to the LRL question of using high voltage for long range metal detection. Are there any of you wizards out there like Esteban, Hung, or ??? who have done anything in this area of research and gotten some kind of indications useful for detection ?

    We live in an electric universe and metals certainly play a strong role in various electric phenomena. ???

    Goldfinder
    Hi goldfinder,

    Here are two examples of high voltage used for metal detection:
    http://www.geotech1.com/forums/showp...55&postcount=7



    Best wishes,
    J_P

    Comment


    • #17
      Tesla Coil for metal detection

      Originally posted by J_Player View Post
      Hi goldfinder,

      Here are two examples of high voltage used for metal detection:
      http://www.geotech1.com/forums/showp...55&postcount=7



      Best wishes,
      J_P
      Thanks for good wishes, same to you JP,
      Looks like some kind of ionization around metal in ground using high voltage. Probably not too good for land mine detection as most of the new ones have very little metal. However, the HV might set off the land mine.

      So how does the ionization around metal that is induced by HV in ground get detected???

      Another embarrassing question I suppose.
      Goldfinder

      Comment


      • #18
        Originally posted by goldfinder
        Thanks for good wishes, same to you JP,
        Looks like some kind of ionization around metal in ground using high voltage. Probably not too good for land mine detection as most of the new ones have very little metal. However, the HV might set off the land mine.

        So how does the ionization around metal that is induced by HV in ground get detected???

        Another embarrassing question I suppose.
        Goldfinder
        In the example of using high voltge from a truck to detect landmines it is expected that the landmine or other UXO may explode. This is the reason why a video camera and HV electrode is mounted on a boom, while the operators are in the back of the truck operating the equipment behind armour. While this method could have questionable value with nonmetallic landmines, we don't usually hunt for nonmetallic gold or silver, so it could be more suitable for that purpose if it actually works like the inventor says.

        When you induce ionization around metal using a Tesla coil, you will see visual evidence called streamers and arcs. You can also sometimes hear a crackling noise. In some conditions you can even see a glowing related to corona discharge. But for most treasure hunting scenarios, I would rely on the streamers, arcs and crackling noise to indicate metal is close to the HV electrode.
        Of course, this is all predicated on a presumption that this patent actually works in practice.

        I also read an account of an LRL experimenter who built an LRL that had a Tesla coil in it as part of the antenna. As it turned out, this was not a high voltage Tesla coil. It was a spiral wound coil, which happened to be patented by Tesla as a method to add capacitance to a coil by the method of winding it. It operated at the antenna voltage without inducing any significant high voltage. It appeared to be a coupling coil used for impedance matching. I also saw where Esteban and a couple of others wound spiral coils in the antennas of their LRLs (also not high voltage). But Esteban did once report a high voltage LRL pistol he once built. As near as I can remember, it used a TV flyback transformer. He said something about taking precautions so he wouldn't get a shock. As I recall, he found marginal use from this detector, and moved on with other experimental pistols which used LEDs and VLF coils or AF coils for treasure hunting. http://www.geotech1.com/forums/showp...7&postcount=45


        Best wishes,
        J_P

        Comment


        • #19
          Arcs and sparks

          As usual your analysis is quite good JP.

          The big problem w/ arcs and sparks is they don't necessarily have to go to metal - anything conductive would work like damp soil that has enough ionic activity to do some conduction.

          One thing that may be fruitful is to have a high voltage probe like regular metal detectors use a coil. The voltage would not have to be high enough to do arcing. Then monitor the HV probe field for anomalies. Conductive metal in the ground would tend to distort the probe field. Might even be special distortions relative to different types of metal.
          Goldfinder

          Comment


          • #20
            Originally posted by goldfinder
            As usual your analysis is quite good JP.

            The big problem w/ arcs and sparks is they don't necessarily have to go to metal - anything conductive would work like damp soil that has enough ionic activity to do some conduction.

            One thing that may be fruitful is to have a high voltage probe like regular metal detectors use a coil. The voltage would not have to be high enough to do arcing. Then monitor the HV probe field for anomalies. Conductive metal in the ground would tend to distort the probe field. Might even be special distortions relative to different types of metal.
            Goldfinder
            Hi goldfinder,

            You are correct, the arc does not have to go to the metal. Looking at the state of advancement for LRLs today, I would think any detection at all is better than what we have come to expect. In the case of high voltage, we may get some false sparking that locates hot rocks, or mineralized areas. And we may get some sparks that locate metal and even gold. This might be a welcome amount of false signals as long as we got a hit or two on gold each day. Also, we might find there are better times to use this method of locating things, such as when it is not a rainy season, and the ground is relatively dry to raise its resistivity. When the ground is in this condition, we may find that ground which has metal buried in it has more conductive dirt above the buried metal due to corroded metal ions. If we find this ground has noticably different resistivity due to metalic ion activity, then maybe the sparks will favor discharging at this location, and mark out a place to dig, even though the sparks were not sparking onto buried metal. In an ideal ionic condition, we would welcome a cylinder of heavily ionized dirt which formed a conductive pipe directly down to the buried metal.

            Others have done experiments in this area. A theory has been speculated that this is the principle that electrostatic detectors use to locate more conductive areas of ground which are expected to produce an area of less strongly charged air above the ground, which we would detect with the electric charge detector. If this is how they work, then they are not detecting gold, but anomalies in the air charge that could be related to a location of buried gold, or to something else, such as somebody dumped a bucket of water in the dirt an hour ago.

            Someone once did some experiments along the lines we are talking, but not with high voltage.
            It was more along the lines of frequency generators/MFD stuff.
            It is interesting to read what he reported: http://www.geotech1.com/forums/showthread.php?t=6663

            "...You can take various loop antennas and sweep them in frequency and measure the power in the loop and watch it change linearly in the presence of various metals, but never showing a peak or dip at any specific frequency..."

            That sounded interesting to me. While he disclaims MFD working in other parts of his post, he reported something that could maybe exploited in some way. It is interesting to note he pretty much gave up on MFD LRL detecting. But for a person who is a dowser, he shows some interesting experiments to look into. While he makes the point the ground absorbs power at low frequencies, I wonder what kind of signals you could get to work in the ground. After all, geologists put their probes in the ground to find buried metal or ores with induced polarization and resistivity studies. From what I recall, they have had success with spectral induced polarization, which may be approaching closer to what people are claiming works in MFD field trials.

            In any case, I will believe MFD recoveries after I see them work reliably, not from reading stories.


            Best wishes,
            J_P

            Comment


            • #21
              I have that very same machine!!!!!!!!!

              Originally posted by J_Player View Post
              Hi goldfinder,

              electreat?
              I looked it up, and it seems to have an interesting history, similar to dowsing.

              It seems the principle of using high voltage stimulation to treat nerve problems began back in ancient Mesopotamia to treat transient pain. Pain victims were exposed to torpedo fish (electric eels) to numb their nerves where it hurts. Then after batteries were invented, experimenters tried inducing currents under the skin to numb nerves. Up until this time, electricity was used as an anasthetic. But by the middle 1800s people were manufacturing electric stimulators which were claimed to cure all kinds of maladies. It was the beginning of the snake oil era. By 1919 the electreat version was patented by Charles Willie Kent and sold (estimated 250,000 units) for home remedy of a number of ailments. Following passage of the Food, Drug and Cosmetic Act in 1938, Kent was the first individual prosecuted by the U.S. government for making unsubstantiated medical claims and the Electreat company was then forced to limit their claims to pain relief alone.

              Today, the electrical stimulators are still being manufactured and used by private citizens as well as in hospitals. Apparently the medical community considers they have some anasthetic value. But these are also used by alternative medical practitioners which include acupuncturists who sometimes attach electrodes to their acupuncture needles. And home users often swear by the great theraputic results they see from using these electric stimulators. From what I can see, it looks like these electric stimulators have a history which runs parallel to the history of dowsing, and they have a similar controversy today, as they are still being used by small numbers as an alternative to mainstream medical treatments. And we also see similar opposing viewpoints about the medical value of these stimulators.

              Sources:
              As a pioneer of quality antibiotics since its foundation in 1974, PT. Meiji Indonesia as a subsidiary of Meiji Seika Pharma Co.,Ltd. Japan, is currently one of the few players in this sector delivering highest production quality standards in Indonesia.





              Best wishes,
              J_P
              Son of a gun, my grandfather used to have that very same machine, I have it now, it has that same black paper box, and I have those same instructions! He had 1943 EverReady batterys in it, they were run down, but for some reason they had not leaked out, so I saved those vintage interesting batterys. Never saw EverReady "D" batterys that had dates on them. He gave it to my mother, and she kept it until she moved into a skilled nursing home, as a memento of her day. So we do not know anything about it, or how he used it, or if it worked or not.
              Melbeta

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