CoilFisher
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- Jul 17, 2011
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Anyone really notice a great difference in these vs the old concentric. Is it all just hype?
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Frankn said:Jason, The concentric delivers all its transmit power through one coil set while the DD delivers 1/2 its power through each of two coil sets. That's why the concentric goes deeper. My concentric picks up at the extreme edges of the coil which means that picture is wrong because it only shows signal at the center hole. The picture is BS. Try any detector with a concentric and prove this to yourself, if that is possible. My detector will pick up a large object at 2' which tells me that little cone is BS. My comments are based on actual usage over many years not just wild mutterings pulled from the air. Frank
Frankn said:Jason, if the "little point" you vision on the coil pattern goes down 2', it must be very wide at normal coin dept. The detector doesn't measure frequency shift, it measures returned signal strength. That target ID number is the amount of transmitted signal that is returned. The detector is programed to "guess" as to what the target is by the amount of signal returned. That's why the detector always indicates a large deep target is shallower than it actually is. I don't think you have the vaguest idea as to what goes on in a detector! I have been detecting for 40+ years and have worked in electronics for 32+ years. Frank
CoilFisher said:Anyone really notice a great difference in these vs the old concentric. Is it all just hype?
Frankn said:Jason, The concentric delivers all its transmit power through one coil set while the DD delivers 1/2 its power through each of two coil sets. That's why the concentric goes deeper. My concentric picks up at the extreme edges of the coil which means that picture is wrong because it only shows signal at the center hole. The picture is BS. Try any detector with a concentric and prove this to yourself, if that is possible. My detector will pick up a large object at 2' which tells me that little cone is BS. My comments are based on actual usage over many years not just wild mutterings pulled from the air. Frank
M Scott @ FTP said:Frankn said:Jason, The concentric delivers all its transmit power through one coil set while the DD delivers 1/2 its power through each of two coil sets. That's why the concentric goes deeper. My concentric picks up at the extreme edges of the coil which means that picture is wrong because it only shows signal at the center hole. The picture is BS. Try any detector with a concentric and prove this to yourself, if that is possible. My detector will pick up a large object at 2' which tells me that little cone is BS. My comments are based on actual usage over many years not just wild mutterings pulled from the air. Frank
Frank is right-the picture is complete BS created by detector companies marketing departments. Far too many people believe the imaginary detector field because they saw it in a manufacturers catalog.....
Here are some facts from detector designer David J whom has also stated the drawings are BS;
http://www.fisherlab.com/hobby/davejohnson/searchcoils essay revised.htm
DD better depth in bad soil and concentrics are cheaper to manufacture-lots more infor if you read all his essays on the web site.
Mike
M Scott @ FTP said:Frank is right-the picture is complete BS created by detector companies marketing departments. Far too many people believe the imaginary detector field because they saw it in a manufacturers catalog.....
Here are some facts from detector designer David J whom has also stated the drawings are BS;
http://www.fisherlab.com/hobby/davejohnson/searchcoils essay revised.htm
DD better depth in bad soil and concentrics are cheaper to manufacture-lots more infor if you read all his essays on the web site.
Mike
CoilFisher said:Anyone really notice a great difference in these vs the old concentric. Is it all just hype?