Oh I am sure you correct Tab and that is why I havent wanted to send her in. I never doubted it could very well be me. Honestly, I still don't get the whole retune detune thing. And you know what, even some very hardcore hunters who have been at it for a while dont either. They think they do though. I recall 53 silver stating it was an optimizing button. For stabalizing the threshold in the event of temperature changes, ground variances etc. Monte says different. Another says it's to retune the machine when changing coils. I know the whole retune thing was popular in some older whites and probably many others, but I don't get it. I know in no motion am i can detune the signal to zero in on big iron or small deep "good target" , and that I do like. But then i switch back to disc and sometimes it's gone until i lift the coil and "retune" it. That is about as much as I know about this button.
See, I never touch my threshold, ever. With thresh to high, ahe has a little more trouble with her disc ability. I also never mess with my gb unless of course it's a little off, which isn't often in my ground. As for the disc knob, well, I never thumb as I'm really trying to learn the good from bad sounds. I guess she just doesnt like no motion with too little disc setting. This is what has puzzled me since day one. I wonder what the disc function really does to the circuit when in no motion? That is the question many experts can't answer. They know it does something but what? Me, i think is right, it changes the sensitivity in a reverse order. Lower disc raises the sense and higher disc lowers the sense. Try it, cause I beleive it to be true also. You can actually see the loss in depth from say a dime on the ground as the knob is turned up. With that said, some machines of the same models may be a little hotter than another of the same model from the day it was new, and those with the hot machines (like me) are experiencing this overloading when the disc is too low in all metal, even causing the machine to stay in an overloaded state qhen switched back to disc. This is my theory and i'm sticking to it....hehe. I really wish with so many Tesoro guys here we would hear more from these outlaw users.