A MD Mystery?

[Circle C Digger]

Been meaning to post this question for a while. Very often I will get a strong repeatable signal of a coin in the ground. I will start digging the hole and eventually lose the signal. I carefully check the pile of dirt to see if it contains the coin, but it does not. After a few more attempts I fill the hole back again. Here's the mystery. Very often I sweep over the filled hole and get a good signal again. Not sure what is going on. I use an XL Pro. Is this a common analog detector quirk?

Circle C Digger

 

[eagleeye]

I have had that happen also. From what I have read and learned,it is usually a halo effect from a piece of iron or other alloy. The halo is caused from the leeching of the alloys or minerals into the surrounding dirt. That is why when you put the plug back you get the signal again. Just my thoughts...

 

[tab-nabit]

I have had where I could not get a signal after digging and filling the dig, as the halo is broken up. I have had different detectors do this and figure thats a part of detecting. I have only had this happen once in awhile.

 

[Monte]

the ground environment you're hunting in.

Several things can happen after you get a good coin-like response and cut a plug. If the target was some iron junk that was rusty, it might have produced a good-sounding audio response, but the probing and plugging might have disturbed the object and what semblance of a 'halo' it might have had. Now disturbed, the target is rejected due to the discriminate level you're using.

If it IS a good eddy-current type target, that is a good conductor such as a coin or ring, and you cut a plug and then do not hear anything .... but do hear it again after the plug is replaced .... then it could be: