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Megawatt Pulse Induction

C

CLIFFSCOT

New member
I am curious to know more about the PI detector Eric built for Mel Fisher. Is this design proprietary? I am trying to put together a detector to go deep, and find larger deeply buried objects. (Ex. bronze cannon under 30-40ft of sand) Any help would be appreciated.

Thanks
 
Hi Cliff,

That was a one off machine designed specially for the Atocha silver bar hunt when it was assumed that they would be buried under 15ft of sand. When they were eventually found they were just sitting on the seabed in a different area, but covered in sand and coral - like a low hill. They were found using one of my diver held detectors which pegged in this particular area to the extent that the diver thought it was faulty. The original unit was built in 1982 and there is no problem in making another, except time and cost. However, finding a bronze cannon at 30 - 40ft is probably at the edge of even todays technology. Iron cannon and ships anchors can be found more easily as they give a greater signal, although you would preferably use a magnetometer for that type of target. For Mel's unit we used a 42in square coil attached to a non-metallic sled. This in itself was a large and difficult thing to manufacture as it has to be very strong in case of snagging on underwater obstructions. Only a thing to use in clear and flat areas. Peak power into the watercooled coil was about 7kW.

Eric.
 
Hi Eric,

Thanks for the reply! The bottom is sandy and the cannons unfortunately are in 30-40ft of sand. I like the idea of making this detector and am willing to incur the cost, but can the coil design be changed to something larger, so that more area could be covered? Possibly an array? I wonder what ever happened to the one you made for Fisher?

Thanks
Cliff
 
http://www.eudem.vub.ac.be/publications/files/MDPatentSearch/v1.1/patent_search/3_Miscellaneous/37_Arrays_Vehicles/US4912414.pdf


See the above design patent could the high powered circuit be coupled to something like this?
 
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