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why is the KHz so important?
- Thread starter Tledoux
- Start date
I know that I am retiring from posting, but I just wanted to add some information that I hope will help you.
Low kHz coils hit well on high conductors like silver and copper, which generally makes them better coin machines ( I believe the ideal kHz for hitting a dime is 2.4 kHz). This does not mean they are "gold dead," but they are weaker on some gold.
Higher kHz coils hit well on low conductors, like gold, aluminum, and tin, which makes them better gold (and often jewelry) machines. Downside, they are very senstive to most of the worst junk in the ground. They are also not necessarily the best on deep coins, though some higher kHz machines will do very well, depending on the circuitry used in that particular model of detector.
Low kHz coils will hit jewelry, though they often lack the senstivity to the smallest gold jewelry pieces. Low kHz coils will hit on well on larger gold jewelry and lower karat jewelry (since they are mixed with baser metals for strength).
Higher kHz coils, especially those very high kHz coils running from about 48 to 71 kHz, are extremely sensitive to gold and will find those pieces of micro (less than 1 gram) gold jewelry, in addition to every tiny fleck of aluminium and similar metal. This is incredibly frustrating and eventually becomes a deal killer for most detectorists. The other potential downside is that their depth is very limited to these smaller targets, but they will hit on them when other machines will go right over this micro gold without making a sound.
Also, if you are not in an area of mineralized soil, skip the DD coil. They will perform less well in neutral soil. Most gold detectors are sold with DD coils because most propecting is done highly mineralized areas. If you are using a gold machine in low mineralization for jewlery hunting, my opinion is to get a concentric coil on there if one is available. It will do much better for you.
I hope you found all that to be somewhat useful. Best of luck to you.
Low kHz coils hit well on high conductors like silver and copper, which generally makes them better coin machines ( I believe the ideal kHz for hitting a dime is 2.4 kHz). This does not mean they are "gold dead," but they are weaker on some gold.
Higher kHz coils hit well on low conductors, like gold, aluminum, and tin, which makes them better gold (and often jewelry) machines. Downside, they are very senstive to most of the worst junk in the ground. They are also not necessarily the best on deep coins, though some higher kHz machines will do very well, depending on the circuitry used in that particular model of detector.
Low kHz coils will hit jewelry, though they often lack the senstivity to the smallest gold jewelry pieces. Low kHz coils will hit on well on larger gold jewelry and lower karat jewelry (since they are mixed with baser metals for strength).
Higher kHz coils, especially those very high kHz coils running from about 48 to 71 kHz, are extremely sensitive to gold and will find those pieces of micro (less than 1 gram) gold jewelry, in addition to every tiny fleck of aluminium and similar metal. This is incredibly frustrating and eventually becomes a deal killer for most detectorists. The other potential downside is that their depth is very limited to these smaller targets, but they will hit on them when other machines will go right over this micro gold without making a sound.
Also, if you are not in an area of mineralized soil, skip the DD coil. They will perform less well in neutral soil. Most gold detectors are sold with DD coils because most propecting is done highly mineralized areas. If you are using a gold machine in low mineralization for jewlery hunting, my opinion is to get a concentric coil on there if one is available. It will do much better for you.
I hope you found all that to be somewhat useful. Best of luck to you.