M6 question

[lambo1]

I am 3 weeks into my first MD..M6 and I have a question.
I was hunting the other day and came across a relatively strong and repeatable 94 on my screen that kept reading $1.
I pinpointed at 7 but when I dug, there wasn't anything there. I put the coil across the hole and the signal became weaker but after a few minutes, the signal was gone over the hole. What did I do wrong?

 

[khouse]

Your auto track may have eliminated your weak signal. On those you can put your tracking in the lock position.

 

[cosmic]

Yes, as khouse stated, if running autotrac mode it will tune out the signal if kept over the target it thinks its ground mineralization and tunes it out.. It also could be a large piece of iron, aluminum or something way down that the VDI and depth are off.. It could be down as far as 10-14" Keep digging.. Another thought is small iron particles from rust that is broken up by digging that causes the signal get weaker.. Get a rare earth magnet to take with you.. Great for picking out small iron when swept over the dug soil.. Keep at it you never know!!