| Metal Detecting for fun or profit can be
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| | search coils. One coil called the
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| one of the most exciting and rewarding of
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| | 'transmitter coil' transmits electricity
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| hobbies. A metal detector can cost very
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| | rapidly many times per second, first in
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| little, as low as $50 or higher that $400
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| | one direction around the coil, then in
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| for a top of the line model. This is one
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| | the other direction. The other coil
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| hobby where you really do get what you
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| | called the 'Receiver Coil' acts just like
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| pay for, because the more expensive top
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| | the name implies it receives frequencies
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| of the line detectors use the most
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| | or data that come or 'bounce' back from
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| advanced technology and they have the
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| | the objects the transmitter coil detects
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| best features available.
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| | in the search area. This type of Metal
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| Metal Detectors use one of three types of
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| | Detector is great for it's ability for
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| technology:
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| | being able to distinguish between
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| BFO (Beat Frequency Oscillation) - Metal
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| | different types of metals.
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| Detectors using BFO technology have two
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| | The first metal detector my wife and I
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| coils of wire, one large coil is located
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| | bought together cost about $69.00 it was
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| in the search coil of the detector, the
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| | one of them cheap ones that used the
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| other small coil of wire is located
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| | 'BFO' technology. This was one of them
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| within the System Control Pack. Each coil
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| | metal detectors you see in the magazines
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| of wire is connected to an oscillator
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| | that sell other household items, etc. You
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| that produces pulses of current. These
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| | can buy cheap metal detectors like these
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| pulses of current pass through the coils
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| | at most Radio Shack stores, and some K
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| generating radio waves. A receiver housed
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| | Marts and Wal Marts. The first day we
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| within the System Control Pack receives
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| | took the metal detector outside we
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| the radio waves and makes a series of
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| | started finding some neet things and my
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| tones based upon the frequencies of the
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| | wife and I were hooked. We did find our
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| radio waves. When the detector search
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| | share of junk items in the yard, like
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| coil passes over a coin or other metal
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| | aluminum foil, nails and the usual pull
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| item a magnetic field is created around
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| | tabs and junk metal. But we also found 7
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| the coin or metal item, this magnetic
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| | old diecast cars in great condition. They
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| field causes interference with the
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| | were all different and were 'TOOTSIE'
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| frequency of the radio waves generated by
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| | diecast vehicles. I looked on eBay and
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| the search coil. And changes the tone
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| | the bunch was worth around $15 or more.
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| produced by the reciever.
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| | We also found a 1961 silver Roosevelt
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| Metal Detectors using BFO technology are
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| | dime in fine condition, in our yard, plus
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| the ones your likely to get when paying
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| | the usual pennies.
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| under $100 for, that's right, the
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| | After reading about how the 3 different
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| cheapies. The BFO technology is the
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| | types of Metal Detector technologies work
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| easiest and cheapest to make, thus the
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| | and differ from each other, you must
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| prices of the detectors are cheap. The
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| | decide how or what you will be mostly
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| only problem is, BFO technology is very
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| | using your metal detector for. Will you
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| limited when compared to PI and BFO
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| | be hunting for small objects like coins,
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| detectors, and the ability to distinguish
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| | jewelry and gold nuggets, or searching
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| between junk metals and silver or other
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| | for a large cache or object. The things
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| coins is very poor.
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| | you may want to use your detector for,
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| PI (Pulse Induction) - Metal Detectors
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| | play one of the most important factors
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| using PI technology sometimes use a
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| | besides pricing in deciding what type of
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| single coil or a series of coils working
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| | detector to buy. Most folks want a
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| together as a transmitter and receiver.
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| | detector that is great at finding coins,
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| Short bursts of electrical current are
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| | gold nuggets, and jewelry on the land and
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| send through a coil of wire, causing a
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| | in small creeks and streams, this would
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| magnetic field. When the burst of
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| | be a detector using 'VLF' technology.
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| electrical current ends the magnetic
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| | Almost all of the modern detectors have a
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| field reverses polarity. A sharp
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| | waterproof search coil which make
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| electrical spike is created, then more
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| | searching in shallow creeks and streams
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| pulses are created, the whole process
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| | possible.
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| repeats and works like a series of
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| | There is Computer Software that is made
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| echoes, giving a different report or echo
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| | just for the hobby of Metal Detecting.
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| depending upon the metal it encounters.
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| | The software is called: Metal Detector -
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| This type of metal detector is not very
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| | Treasure Hunter Professional, and may be
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| good for discrimination between different
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| | seen at this website address:
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| types of metals or coins, but it is good
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| | By Robert W. Benjamin
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| to use where some other types of metal
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| | Copyright © 2005
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| detectors have trouble working, such as
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| | You may publish this article in your
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| in salt-water, and metals can be detected
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| | ezine, newsletter on your web site as
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| much deeper with this technology than the
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| | long as it is reprinted in its entirety
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| others.
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| | and without modification except for
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| VLF (Very Low Frequency) - Metal
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| | formatting needs or grammar corrections.
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| Detectors using this technology have two
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