Yep but mainly it relates to PI machines, In short ground noise = Mineralization or mineralized hot spots, with VLF's it presents much larger issues, With new machines we have fast auto-track etc which deals with the changes but not with the feedback from the ground, It can be dealt with in a number of ways IE Whites V-SAT systems or/and running at a much lower gain but with the Older machines they were far better at dealing with such conditions, Where you could ground balance to help cancel out the ground like you can with newer machines but on the older models you could also adjust the DISC to cancel out any ground noise completely, and also they had a lot more power to the point of what a modern day machine can achieve using a 15" Concentric Coil the older machines can/could do using a 9.5" Coil.
When I spoke to a Whites engineer earlier this year he told me that a lot of power was lost when Detectors switched from Analogue to Digital, Because It was the Analogue components that created the Power, where as now it is all done via digital software,
Until a person can run side by side tests as I have done comparing the two technologies only then will you see the differences between them, and to be honest it is a Bitter pill to swallow.
John.
Greetings from mother Russia to all fellow treasure hunters. I have been into relics hunt for quite some time now in the wast 😉 wilderness of cold weather and hot drinks ) Coming to the same conclusion about analogue technology in MD was a revelation that has happened just a few weeks ago. Not satisfied with modern DD offerings I started building my own coils researching and reading russsian forums when I found a very wery 😅 promising design of square wave PI machine on md4u.ru. The detector recuperates the energy and hops through many loops with ultra professional analogue design. On the point of discussion here, the engineer who created the marvel MD comments that he refrained from using digital ics and blocks only because of the common sense, - if he was to use integrated circuits, it would either cost on power consumption or weight or signal resolution or combination of all these plus a number of other factors. As I gathered, this is the most sofisticated diy project and, to my mind, most advanced discrimation technology invented. Astounding one man show that can take on competition of Minelab and its latest GPZ (also uses square wave PI). The invention is currently tested with ferrite core rod in the search head. With certain improvements this type of device can test ground several meters with very little effect from any difficult soil types (another advantage of the design).
How Deep Do Today's Detectors Go Compared To Older Technology?
in Metal Detector Advice & Comparisons
Posted
Greetings from mother Russia to all fellow treasure hunters. I have been into relics hunt for quite some time now in the wast 😉 wilderness of cold weather and hot drinks ) Coming to the same conclusion about analogue technology in MD was a revelation that has happened just a few weeks ago. Not satisfied with modern DD offerings I started building my own coils researching and reading russsian forums when I found a very wery 😅 promising design of square wave PI machine on md4u.ru. The detector recuperates the energy and hops through many loops with ultra professional analogue design. On the point of discussion here, the engineer who created the marvel MD comments that he refrained from using digital ics and blocks only because of the common sense, - if he was to use integrated circuits, it would either cost on power consumption or weight or signal resolution or combination of all these plus a number of other factors. As I gathered, this is the most sofisticated diy project and, to my mind, most advanced discrimation technology invented. Astounding one man show that can take on competition of Minelab and its latest GPZ (also uses square wave PI). The invention is currently tested with ferrite core rod in the search head. With certain improvements this type of device can test ground several meters with very little effect from any difficult soil types (another advantage of the design).