Hot Rocks!

[Qwest]

Anybody have any suggestions? I know my Max has a frequency setting, but I have not messed with it since I got it. This park I frequent has these lightweight black, almost coal like rocks that seem to ring high in the ground, and they make my pin-pointer go off as well, but once I've removed them from the plug, they don't register at all on my Max. It seems like I'm chasing ghost signal with these things. Does anybody have any experience with the freq. setting and will it help? Thanks in advance!

 

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