Kent Klein asked:


The most noticeable item in any backyard foundry is the furnace. This is no surprise really, because without the furnace the entire metal casting operation would be nonexistent. The furnace can take really any size and form depending upon the need and budget of the metal caster. What really makes home metal casting furnaces really unique is how many of them come into creation.

Sure there are plenty of companies that will gladly sell furnaces for the hobby metal caster and while this can be a viable solution to your furnace needs many metal casters prefer another method.

Making your own furnace is not as far fetched as it may seem and if you already a Do It Yourselfer, chances are you will have the needed skills and tools in your workshop or garage already. There are a variety of reasons why people make their own furnaces. The most common reason is fulfilling a need.

Many hobbyist and metal workers find out, to their dismay, that the local commercial foundries can not make the needed part or if they do, they feel the need to charge an outrageous sum. Not to mention the fact that the traditional methods of metal casting is quickly becoming forgotten as the industry turns to electric furnaces. So many hobbyists find that constructing their own furnace is an absolute necessity and a great way to preserve a piece of craftsman history. The artisans who use metal casting to create sculptures and other pieces find that making their own furnace grants them a greater amount of control over the entire process. This is actually how many people get into metal casting to begin with.

Most likely, your first furnace is going to be a small and rather simple one. There is really no need to run before you can walk when it comes to something that will be using intense heat and melting iron which can be rather dangerous.

Home made furnaces have been constructed from coffee cans to trash cans or sheet metal welded together. While there are a few components that really should be bought like the retractor to line the furnace walls which should be resistant to high temperature for a prolonged period of time along with special connectors and regulators, most of the furnace can be created in your own home. You should be able to find most of the components that you can not make at hardware stores or plumbing supply stores for relatively cheap.

Along with the furnace parts you will also need to buy a crucible which will hold the metal as it melts along with the appropriate tools that you will use to handle the crucible. While you are at it you might as well buy all the safety equipment like gloves, protective eye wear, and leather shoes. There is other safety equipment that you will need depending on the type of work and the type of furnace you are going to make.

Most likely, your first furnace is going to be a simple cupola variation. The cupola furnace which is going to resemble a smoke stack is a simple design and is relatively easy to make for anyone with mild craft skill. This type of furnace will not require a crucible since you will be able to pour the molten metal from the furnace itself into a ladle that can then be poured into the mold.

DIY casting furnaces are a great way to connect yourself with your metal casting work giving you more control. While building the furnace can be complicated at first, once you delve into it you will find the experience enjoyable and fascinating.

Jin Huang asked:


A third style, the Printed Spiral, is made only by Tesoro for use with pulse induction circuitry. It offers good sensitivity to a broader range of target sizes and improved sensitivity to less conductive targets such as fine gold chains. All searchcoils are electrostatically shielded and waterproof. There are certain features needed for certain places the device is going to be used for. If you intend to use it on the beach, the terrain wont be that rigorous. But you are going to need waterproof protection.

Hand-held Metal Detectors are designed to safeguard security-sensitive areas like schools, courtrooms, corrections facilities, sports events, businesses, nightclubs, bars and other public areas and events. They are used along with walk-through metal detectors.

Metal detectors work on the principal of electromagnetism and their effects on conductive metals. The high-powered coil of metal, called the transmitter, uses the battery power to generate a penetrating magnetic field. As the electromagnetic field enters the ground, anything metallic will become charged with magnetism.

Metal detecting for beginners

Metal detecting activity is full of excitement and is an adrenaline rush. No wonder, for anyone who easily fell in love with this hobby and is determined to get started. No one will blame you for it. As a beginner, you will need some valuable tips to get you started on your hunt for treasure. Follow these tips and you will never go wrong.

1.Identify winning spots to make your treasure hunting a success. Sure areas where you can conduct a metal detecting spree are as follows:

Backyards - to start your metal detecting session, please do not hesitate to dig up your own area; avoid the misconception that you already know your area and no interesting finds can be dug up;

Woods - this is a rich soil for treasure hunters because this is perceived to be one of the places treasures are hidden;

Parks - people converge on parks and street cleaners might clean up the whole area, but there is always the possibility that you can find something in the park;

Riverbanks - these places can also be a haven for hunters. You can also do a little researching about ship ports, ferry landings and others which can also increase your chances for having more interesting finds;

When buying a metal detector consider the price. If the metal detector offers the best features of a then expect it to be expensive. If having fewer features is all right with you, go for a less expensive one. Metal detectors can run from as low as $50 to higher than $800. The good news is that prices have never been lower for such easy to use full featured automatic detectors. A good way to view the purchase is to decide how much money you are comfortable spending.

Any place there is construction and the ground is being cleared, that is a great place to start treasure hunting. Successfull treasure hunting starts with having the right metal detector. But which type of metal detector should you get? Complete info on metal detectors and treasure hunting at http://detect-metal.info. he man of the house would have buried a cache of money someplace that could be seen from the bedroom window. Loose change could have been dropped when getting in or out of vehicles.

Some cant perform as much. This is decided by the battery life of the device you are going to purchase. Also decide if you rather have extra batteries or if you prefer to get a charging kit.

For walking speed, remember the paint rollerr analogy above. As long as you are painting the entire surface of the ground and not missing any spots, you are not walking too quickly. However, if you find that your imaginary paint is missing areas, you need to slow down your pace.

Beaches - people gather on beaches for summer fun and these places are also good for the hunters; find a quiet time to conduct your hunting spree; especially during peak season so no one can “bug you” and all your finds may remain intact since laws order a cleaning of seashores during evenings or early mornings;

2.Study and learn your entire metal detector, inside and out. Make it a habit to read and internalize the manual of your metal detector so you can master its use and maintenance for effective metal detecting. After learning it, practice the use of it and try to feel determine what your metal detector is trying to tell you.

3.It is important to do your assignment - research about metal detecting and learn the principles of its use. With the references available, you can also find some other places where you can conduct your metal detecting search or ask for the support of your neighbors by asking them to open up their backyards for you. Explain to them metal detecting as a form of a hobby as well as its practical use.

These are tips to guide you as you get started on your metal detecting spree. If you do all these, metal detecting will never be complicated for you as you learn all the skills required.

A recent study proves that hand-held metal detectors are just as accurate as x-rays in finding coins and other metallic objects swallowed by children. Schools everywhere are using metal detectors to help filter out violence. The metal detectors can very easily (for this is why they are used) detect a knife or gun. Police stations and Airports use them as well.

The basic metal detectors are easy to get used to, with less features and buttons. Find out more about bounty hunter metal detector today! It does, however, have its own downsides. Some say that the knobs of the Pro XL are quite loose and when adjusting it, you have to be careful not to hit it with your arms. It is quite sensitive and bumping it may require you to start or reset the adjustments. Some users put a rubber band around the knobs to keep them from moving or becoming loose. It is always very nice to purchase at least the second model up in the brand. You will get a few more bells and whistles and a lot more control over your detecting. Total purchase means that you will also need some accessory items such as trowels, scoops headphones and coil covers.

Simon Oliver asked:


If you are planning to buy a metal detector, you should check out the features of each before buying one. Metal detecting is a fun hobby but having the wrong equipment can cost you time and money.

When buying a metal detector consider the price. If the metal detector offers the best features of a then expect it to be expensive. If having fewer features is all right with you, go for a less expensive one. Metal detectors can run from as low as $50 to higher than $400.

Some metal detectors use BFO (Beat Frequent Oscillation). This technology contains two coils of wire. The two coils are represented by two wires which is the large and the small. The large coil can be found in the search coil of the detector while the small coil is found on the System Control Pack. The coils are connected to an oscillator which produces pulses of current. The pulse passes through the coils in order to generate radio waves.

A receiver within the System Control Pack receives the radio waves causing it to make a series of tones which is based upon the frequencies coming from the radio waves. Once the detector search coil encounters a coin or any metal item, it is surrounded by a magnetic field which causes interference with the frequency. The tone produced by the receiver is then changed. In choosing the best detectors, you should pick the ones with BFO. This technology is the easiest to use and the cheapest to own.

Metal detectors using PI (Pulse Induction) technology often makes use of a single coil or even a series of coils that works as a receiver and the transmitter. The short bursts of electricity are allowed to pass through a coil or wire which causes magnetism. The magnetic field will reverse its polarity if the bursts of electrical current are stopped.

More pulses are created when sharp electrical spike is created. Then the whole process will repeat and works like a series of echoes, giving it a different report which depends on the metal it has encountered. Therefore, this type of detector is not that ideal for discrimination between the various types of metals or coins. This is appropriate to use in areas where salt-water and metals can be detected.

VLF (Very Low Frequency) is a metal detector having two search coils. The two coils are the “transmitter coil” which rapidly transmits electricity and the other coil known as the “receiver coil”. The activity of this coil is implied in its name already. It is responsible for receiving frequencies that bounce back from the object that the coil detects. This type of detector is best for identifying different types of metals.

Now that you have learned the three different types of metal detector, it’s up to you to make your choice as to what type of detector you wish to use for your searches.