Lesson learned.

[Anonymous]

I had about 30 minutes after work today, so I made a test run with the new 5'' coil on the 'z70. Hit an old school turned community center that I've hunted many times before. Found ground balancing to be a breeze (bobbing method). Because of the time constraint I innitially notched out all but coins, but shortly after decided that I like to hear everything, so "unnotched" everything. Only dug 3 holes. The first I was sure was a nail, but I dug it to make sure. Yep. A nail. Second was a clad dime about 2'' deep. The third surprised me. Right on top of a little root that was poking out of the ground I got a solid zinc penny hit. Pinpointed small and shallow, at surface level. Barely under the surface at the base of the root was a heavily corroded '27 wheatie. I suppose the corrosion made it bump down into the zinc zone.
So lesson learned...if the site has potential for oldies, dig the zinc signals!
w

 

[Anonymous]

Some older heavily corroded wheaties will come in as zinc...Surprising how real old coins can be found shallow near trees..Would imagine the roots have something to do with this. Last year got a seated dime about an inch deep near large tree..Try it a long old sidewalks as many coin rolled to the side and dropped just to the edge. Just won't get them with a larger coil...

 

[Anonymous]

I was hitting an easement (like Dan-Pa said) with my "hockey puck". I didn't get much of anything good until just as I was finishing up, and was working close to a tree trunk. I got a Zinc hit that indicated an inch down. I popped out a 1907 IH in SWEET condition, hardly any wear, and NO CORROSION. That was the first or second IH I found here in MI, and most of them are not corroded. It boggles my mind sometimes.
And yes, corroded Wheat's will read Zinc. I've dug a bunch of them. In fact, in some areas where my coppers are corroded around here, I carefully watch the meter as I pass my coil over the top of the target several times. If I see even one bounce to Zinc, I know I have a corroded Wheat. If the hit stays solid High Coin or High/Low bouncing, I have a possible silver or uncorroded copper.
HH from Allen in MI

 

[Anonymous]

I have also found with my 3D that quite a few IHs will fall into the "Zinc zone". Mostly 1880-1900 will do this but some others will also. I also dig quite a bit of junk finds in the zinc reading but that's what you have to put up with to get the good ones. I generally do a target profile in pinpoint mode to figure out how big the target is before I dig it. If it's too big, I won't bother. I guess I could be missing the jar lid that has a jar full of coins below it but after digging the other 200 pieces of junk, I'll live with the guilt. <img src="/metal/html/lol.gif" border=0 width=15 height=15 alt=":lol">
Dave