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my warm greeting to Geotech Forum members. I am thinking of building a one aim detector - focused only to build a "Gold detector". As I can't afford the price for buying new or used Gld detectors, what I only can do is to build from scrach. Thus, I need the following help... 1. Choosing the Best PCB kit to be based on....I heard the Pi2 and located ....but I haven't got any info if there are any advanced PCB than Pi2 2. Where to find the PCB and all the electronic items... 3. How to build it. Thanks before hand. Ef
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Tell us more about terrains you wish to visit. What kind of mineralisation you have? Maybe a lot of iron ore? Or no iron at all?
Also what import limitations are in force in your country? Can you import a kit from EU or Turkey, or Ukraine? -
Thanks for your reply Davor. Well, mine is mostly desert area..... from what I could have read and understood sofar, mostly I am looking for a "placer gold" which has a lot of stones (pebbles) and sand too but easy to dig. from what I have found there is a lot of balck stones...which I guess are Irone ore [the stones we foudnd are black in color] ...but there are quartize up on the mountain which we found to have some Gold after a lot of digging with hammers and things like that. Generally the area is rich in Gold nuggets not of fine Gold. As for the kit I have no problem in importing the Kit. I just needed the best PCB to be based on (PI, BFO, or other technology which is lately known to be the best) so that to have a highly sensitive Gold detector having related to my environment. Thanks again.Originally posted by Davor View PostComment
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I may guess the black stones are some kind of iron ore, and it is also good to know that you are after nuggets. That broadens a choice.
My guess is that you'll have equal success with VLF and PI. That said, there are differences between devices optimised for coins (most VLF below 10kHz) on the shore (simple PI like Baracuda or Surf PI), and real small gold detectors like Gold bug.
IMHO the best choice among PI would be Goldscan or maybe Delta pulse, and the best choice among VLF would be Lobo or TGSL. Maybe the easiest project would be Lobo lite, but I have no idea if you'll be able to obtain a PCB.Comment
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BTW, black sands are magnetic, so finding a stream is much easier with a magnetometer. Once you find a stream with a magnetometer, and have a good idea where it was flowing, you may concentrate your efforts to finding nuggets with metal detector in a much narrower area. Simple magnetometers are in gradiometer configuration. Seek FGM on this forum.Comment
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You will also need to give close attention to building a 'fast coil' for the detector. Read the paper by BB Sailor on this web site 'Making a fast pulse induction mono coil'.
Good Luck
DanComment
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Here is the BB Sailor paper on fast mono coil building:
http://www.geotech1.com/pages/metdet...s/FastCoil.pdfComment
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Thank you for the info baum7154. Well, I have read the pdf that deals with coiling. As I understood, since it deals with the hammer head which the latest schema I could find is of 2006, I wonder if I should finally go for it. I have the schema and its workings in pdf. So should I order for building this hammer head pcb or is there any other advanced schemas than this. Once again, I am looking for a schema to build a pcb that is known to have a good detection at placer gold nuggets......which is known to work and possibly with links to the schemas and its workings. Thank you all for your help.Comment
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I have not built the Hammerhead but do believe it to be a very adaptable unit from what I have read on this forum. I have only built the CHANCE PI detector and I am just now getting it afield in searching for small placer gold. The Hammerhead has the advantage of being fully adjustable/tunable to make it useful for detection of virtually any metal.
Good luck
DanComment
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