Using a multipurpose detector with automatic ground balance & audio visual discrimination
If you are going to be working in an area with boulders which are leftover tailings from old miners and sandy mounds that are made up of decomposed bedrock, you should consider taking a detector that will allow you to ground cancel easily. With these types of detectors all you have to do is move the ground balance toggle on the control box upwards and hold the loop in the air and wait for it to make a beep sound. Bring the loop down to the ground and press the toggle downwards; this should make the detector beep once again and this means the ground canceling has been done adequately. When prospecting, ground canceling is usually done whenever the threshold seems to get softer or louder as the prospector moves to diverse locations. This can then be done after every five minutes or so in order to practice it. In cases in which the prospector is using a tracking detector, he can simply pump it up and down every once in awhile to obtain the same purpose. It is very essential to keep the detector tuned to the ground when the ground that is being worked on is bad. The same consideration should be taken when it comes to setting the threshold hum, as well as the volume of the headphones and the amount of sensitivity. It would be a good idea to be careful about not trying to tune the detector over a piece of metal on the ground. Remember that there are a lot of areas that are full of debris when mining so the prospector will need to make sure to move his loop around until is able to locate an area that is clean and where he will be able to successfully tune his detector.
Be careful with not confusing the difference in hum from alterations in the ground, with the change in hum from what is known as loop drift. This is when the mineralization that is in the ground changes the hum alternately in both directions. Therefore, if the mineralization becomes higher, the hum goes down. If the mineralization on the other hand becomes lower, the hum increases. This can only be seen in cases when the hoop is close to the ground. This can be fixed or corrected by balancing it manually to the new ground or by using a detector that has the ability to track to the ground and maintains its ground balanced. This could appear like the only alternative to pick from, however even tracking detectors have certain inconveniences. It seems as if they have more of a difficult time with smaller gold nugget targets and need to be used at slower search speeds. This therefore clearly shows us that there is not just one special detector that has the ability to accomplish everything. It is important for the prospector to pick out the one that will be best for him and his type of prospecting and learn how to use it adequately.
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