Infinium sounding off on river rocks...

[snaps]

Hello all,


I was hunting a river the other day, and got a decent hi-lo signal and it ended up being a big rock. not a hot rock, just a rock. I had to crank up the disc to 9 to null out the rock. I have never in 4 yrs picked up a rock w/ this machine, even in some nasty-hot virginia soil. Anyone experience this? Im going back w/ another coil and see if thats the problem. Thanks, snaps

 

[bearkat4160]

I've had those rare moments with mine also. Maybe its a meterite. Maybe its got alot of iron in it. No big deal sounds like...just a freak rock.

Alan

 

[Adrian SS]

Often with the Infinium when a rock like iron ore gives a hi/lo it will not tune out by winding up the disc, even a weak signal will remain audible in the iron check position. it is likely that your rock contains conductive metal of some kind. If you have a manual GB VLF machine set the Gb to about 2/3rds from max clockwise and run the rock past the coil, if the threshold goes quiet then then the rock is probably a mineral hot rock, if the threshold increaces then it may have some metal content.This is a pretty rough check. If you had a Scorpion Gold stinger you could do a calibrated TR Mode metal/ Mineral check.
See if a magnet is attracted to the rock or if it deflects a compass needle.If you have an Ohmmeter you can connesct the probes to the rock and see if it is conductive or you could crack it open with a hammer n av a looksee. unusual for the Infinium to give a strong response to a hot rock but not impossible.

 

[snaps]

Alan and Adrian Thanks,


When I get a free moment I will run it through some of those tests.Hope it is a freak rock.BTW, I was using the 5x10 coil in water no deeper than waist-high, wich I read was OK.