Guest AU prae Posted March 23, 2011 Report Share Posted March 23, 2011 My experience with a VLF and PI are slight,but it seemed to me the PI was a much more actuate machine in hot rock areas. Could someone explain? Link to comment Share on other sites More sharing options...
Azoverland Posted March 23, 2011 Report Share Posted March 23, 2011 I'm no expert but my understanding is the PI machine sends a pulse of engery into the ground and measures at what rate the pulse dissipates where as the VLF machines looks for a rebound or distortion of the frequency feild. Minelab just has far more R&D money and time into PI technology and their more advanced machines and timings more accurately measure the decay rate of the feild. My thershold will still squawk in hot rock infested areas but there are many options to tune the machine to lessen these variations. Link to comment Share on other sites More sharing options...
Terry Soloman Posted March 23, 2011 Report Share Posted March 23, 2011 My experience with a VLF and PI are slight,but it seemed to me the PI was a much more actuate machine in hot rock areas. Could someone explain?I shot video (badly), of Steve Gholson explaining the differences in PI and VLF technology, at the Minelab Technology Training Center grand opening. It is in three parts (Look for Rob!) Here is part one - Terry Link to comment Share on other sites More sharing options...
frank c Posted March 23, 2011 Report Share Posted March 23, 2011 I'm no EGGSPERT but heres how I understand the general comparision of P.I. and VLF. Hope it helps you abit.Your P.I. machines will deploy a pulse signal and then stop this is constantly repeated. Allowing it to pretty much "ignore" most mineralised ground.The VLF's are constantly emmiting a signal therefore they will actually charge the area of the signal continuously and actually cause a highly mineralised area to be "harder" to read also lessening the depth it is capable of detecting a target, whereas in an area of more neutral ground (less mineralized) you will get better depth recognition of a target signal. Link to comment Share on other sites More sharing options...
azblackbird Posted March 24, 2011 Report Share Posted March 24, 2011 My experience with a VLF and PI are slight,but it seemed to me the PI was a much more actuate machine in hot rock areas. Could someone explain?Here's some info that may answer your question. It may be a little old, but nevertheless it explains the theory. Link to comment Share on other sites More sharing options...
Azoverland Posted March 24, 2011 Report Share Posted March 24, 2011 Here's some info that may answer your question. It may be a little old, but nevertheless it explains the theory.Great link, I found the write up about the discrimination very interesting. I really got to get my hands on a good VLF to play with. Link to comment Share on other sites More sharing options...
frank c Posted March 24, 2011 Report Share Posted March 24, 2011 If your going to hunt for gold nuggets get a gold specific VLF. It will also cover meteorites well. Link to comment Share on other sites More sharing options...
Guest AU prae Posted March 25, 2011 Report Share Posted March 25, 2011 THANKS Guys what GREAT answers!!! Paula Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.