A crazy idea - but in might work

[pelanj]

I guess I am reinventing the wheel, but I got an idea about kind of "reverse discrimination" on the Quattro. I would set target volume very low, threshold a little higher than usual to hear it well and notch out the desired target IDs (12,15,19 and 33 - 39) for example. Then, I would be hunting for "nulls" in the threshold. Is there a chance this would work better that the normal way, ie. notching out everything except for the desired targets?

I hope I will have some time to test it either tomorrow or on Thursday...I am just asking in case anyone has tried this before

 

[Goldstrike]

It's an interesting concept but in the nulling mode, there are no variety of tones, therefore you will not be able to differentiate between the good and bad targets. I suppose it's like having a P.I. (pulse induction) detector.You have no ability to choose to dig or not to dig because there is only one tone! unless you get one that has a discrimination program on it. It will work but you may as well throw your Safari/Quattro away and get a P.I. instead.....but thanks for thinking and thanks very much for sharing because we are all on a learning curve! Try it out and share your findings!!!!

 

[pelanj]

I was thinking to use it like this for specific coins on a beach - once you get a null, you know it should be one of the desired target. So it would not be as a PI, but more like a beep and dig (or in this case null and dig) machine with selective discrimination.

My main reason for using this "reverse" discrimination would be target masking by the relatively slow Quattro in normal discrimination mode. The null on a piece of iron could hide a coin. In this "reverse" setting, one would not hear the iron, but a null from the coin. And it would not matter if the coin masked the iron. As soon as I try it out, I will share the results - but there is so little time for "normal" detecting that I do not want to waste much of it by experimenting.