Posted by Reg on 3/19/2008, 5:23 pm, in reply to "Re: reply"
75.71.144.124
Hi Tom,
I suspect the GS 5 you saw tested was one of the earliest models and was using one of the stock coils at the time. If this was the case, then even with none of my pc board mods, the next GS 5 very quickly to come out had improvements including the ability to use ML compatible coils.
Now, the original coils were only 200 or 250 uh, I don't remember which. The next generation coils were 300 uh and this alone resulted in an increase in depth. The numbers I heard were 15 to 20% increase, but I have not verified that. So, with none of my pc mods, there was an improvement over the original design.
The original GS 5's also required an immediate range pot change to increase the overall sensitivity. This was done early in the game, so it is hard to say if the unit you saw had this change or not, but again, this was a quick advancement over the original that added a noticeable increase in depth.
The next generation of mods were aimed more at the OZ market and involved more mods that were more simple adjustments than anything else. The exception was a stability mod aimed at keeping the threshold from changing.
The latest mods do involve making some changes that allow for faster sampling and lower noise. Again, these have been implemented as far as I know.
Now, the latest GS 5 mods incorporate my GB expansion and the enhancements just mentioned, so I suspect the latest GS 5 is extremely close to being able to meet your criteria.
I suspect the Whites unit will have many if not most of these mods also, but I can't say for sure.
So, the bottom line is, the detector you want just may be available now or will be extremely soon. The exception would be any form of TID. I do know the concept I am planning on using was passed along a long time ago. Whether any work has been done on this issue or not by others, I can't say.
The bottom line is, Eric's original design of the GS 5 was extremely close to what is being built today and what I am using. The key was a series of minor mods to enhance the features of the unit. I say minor because the actual changes were not that dramatic. However, I can say a whole lot of man hours were invested in figuring out just what needed to be done to fine tune the design.
Now, on one of the later GS 5 designs, there is the ability to reverse the tones heard. I don't know if Whites will implement this or not. Anyway, with a couple of minor changes and this later tone reversal design, one could easily make a detector that only responded to the higher conductor targets and remained silent or nearly silent on the other objects such as iron, foil, or lower conductor objects. One might get some chatter or maybe a stutter, but overall, I think it could be something easily implemented and work quite well.
This possible addition would make the PI more like a typical VLF in its disc features. Now, as far as I know this idea has not been implemented. However, it is something that Whites might want to think about. If they do implement the tone reversal, then they simply have to add a switch to eliminate the undesired tone.
So, just be a little patient, what you are wanting just might be available very soon and this doesn't take into account the Nemesis.
Reg
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