auminesweeper Posted April 17, 2016 Share Posted April 17, 2016 Good Post argyle, I must admit I run a large 12" Concentric On my VLF most of the time and it will blow the doors off a PI, But hey a PI is not meant for that type of ground so it's not a fair comparison, and I also have a 15" concentric for the VLF too, Now that is a beast, on beer can sized items, 3 to 4 feet and a 1.3 ozt flat lump of lead is about 28 " to about 35 ", That's a very interesting post of yours, Having a High Gain VLF Is a great comfort under those condition you describe, I even used it in a fire pit once and I found a heap of coins but all the soil apart from all the burnt ash and charcoal the soil had turned quite Red from the heat, but because it can handle many types of ground and because how the gain works I am stuck at a point where very little impresses me and I can't find another machine that gives me a clear edge in all modes, and my 48khz machine is a wild card on fine bits and since I got that Longscan coil it is a totally different beast In how it picks up real tiny stuff way better than the Twin D coil and another strange effect is that it also lowers my GB setting by about 20% which means I have a bit in reserve for when I hit the hotter Ground, John 2 Link to comment Share on other sites More sharing options...
argyle Posted April 17, 2016 Share Posted April 17, 2016 Yep, it's all about choices John, for sure. And our coil choices are definitely the most advantageous accessory we can use. Link to comment Share on other sites More sharing options...
auminesweeper Posted April 17, 2016 Share Posted April 17, 2016 I was always of the mind that mullock heaps were pretty much like normal ground, but I can see how the fine stuff once it has been soaked a few times and baked in the sun could revert back close to it's original state mineral wise.. John 1 Link to comment Share on other sites More sharing options...
goldbrick Posted April 17, 2016 Author Share Posted April 17, 2016 Thanks for the astute answers by all respondents. These answers cover a lot of info and I know I will use this advice in the future. John, ditto on using pesky hot rocks to GB to as a last resort. Coil control is important, with the TDI you can many times eliminate GB ON by using good coil control. Chuck, I believe both those locales are placer tailings. Regrettably I never went to either place. Tortuga, you are killing me. Everyone that hunts in the desert has great luck on old drywash piles-except me! Steve, thanks so much for the great tip on sulfides masking gold on hard rock tailings. I did not know that but now I will watch for that occurence. Glenn, agreed that each pile is a new situation maybe different from the last and no one detector covers the myriad of detecting possibilities. Recently I hunted a pile where the gold is so small if you dont have a GBII or Gold Racer you may as well go home. SDC 2300 or mid-khz VLF just will not cut it. Argyle, I could copy and paste your reply and use it as my own (with permission of course). It seems we can use broad generalities in reference to working All types of tailings and the machines that may be used to advantage. But we need to be aware that situations will occur where we must use free thinking and local knowledge to arrive at the best course of action for each individual scenario. 3 Link to comment Share on other sites More sharing options...
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