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Explorer Problems???

A

Anonymous

Guest
I've been noticing that I haven't been making any coin finds deeper than 4"~5" or so.
I've done air tests with the below results but I don't think air testing is very accurate or reliable.
IH's, Wheaties, Barber/Merc/Rosie silver dimes: 6"
V and Buffalo Nickels: 7 to 8"
Barber/SL/Washington quarters: 8" to 9"
Walking Liberty Half: 9" to 10".
Am I having problems? Or is it just a coincidence that my finds are at that depth and I'm just being paranoid?
I run in IM -12 to -14 with my sensitivity set high enough that the threshold just begins to break up when I sweep the coil. Today I had a good threshold all the way up at 32-Auto. I also have my recovery mode set to deep with conductive tones and audio1.
Has anyone else had any experience with this and can it be fixed? If so, how?
any help much appreciated.
 
Air tests don't tell the full story. Add a few ground minerals, iron and discrimination and it's a different ball game. For a start peolpe are forgetting the 2 or more inches of grass and air space between your coil and the soil surface so a coin at 4 inches below ground would be at least 6 inches from your coil.
People claim to be getting coins at 14 inches (which would be at least 16 inches from the coil with 2 inches of airspace) these people must have the coil pressed very hard to the ground or be using a measure with smaller inches than the rest of us !!
Try burying some coins at varying depths and in different soils and keep the coil as close to the ground as possible.
Another problem is ground mineralization and discrimination. When you disc out iron and other trash you are also nulling a small area around the iron and trash, this also occurs with iron rich minerals. When there is a lot of iron, trash or ground minerals the nulls will blend together and you will be missing any deeper targets between. As an experiment try using a clear screen, 32 sensitivity, ferrous sounds, gain at 10 , variability 10, threshold tone 1 ( this is threshold tones under "tones" not threshold on the main screen ), variability 10, limits 10. If you go slow and with these settings you will be able to hear everything that your coil passes over to maximum depth provided it is not completely covered by another target or minerals. Ground minerals and very small iron and rust will give a regular short, very low tone, larger iron will be a slightly longer higher tone and other metals will give noticably higher tones. These settings will drive you nuts after a while but will give you a great insight as to what you are really nulling out with discrimination.
 
I hunt with my coil scrubbing the ground. As to discrimination. I'm already practically wide open in IM -14. I'll try some of the other stuff though too....thanks!!
 
how are you doing the test? is that outside with coin placed on top of ground or you waving it in front of coil.. if on top of ground you should be getting more than that.. manual sens?
 
Like I said, I think I'm just being paranoid and the machine is fine.
 
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