depth vs blanking problems

[oldcellar]

I have been at it a few years now and have done quite well. But here is something that I can't figure out. My ex II is a great machine but sometimes it does not read a coin deeper than 4 to 5 inches. I normally use the standard coin mode and it is normally fine. Here is my problem. My hunting buddy has an old whites classic ID. Real basic machine. He was picking up a dime signal at 7 inches and when I ran my ex over it, it was only blanking. It ended up being a 1891 seated dime. Is there any suggestions on this? I keep my sensitivity at 24, thresh up, gain at 5.

 

[dewcon4414]

Are you using manual sensitivity? If not, semi might be over compensating for soil, EMI, or deep iron. Your threshold should be just enough to hear changes in nulls and tones. If its too high those week signals cant break the threshold especially with a gain of 5. Id suggest using 6 or 7 gain you still get the same modulation between deep and shallow targets. Did you try pinpointing over the target? Id suggest you REBOOT your machine sometimes that makes a difference.

Dew

 

[Big Fang Coin Biter]

Not sure what standard coin mode is, but you may want to try less discrimination. Try running iron mask with about an eighth to a quarter inch of the left side of the screen discriminated out. As dewcon4414 said a gain of 6 or 7 would be good too. That should help with the nulls. Next time you could also try this... put on ferrous tones and use no discrimination - that should get you hearing deep stuff in iron, and be a good test to see if everything is working ok.
Hope this helps - BF

 

[muggsc]

If you read the post that Bryce posted last evening you might have picked up on a very good tip. Sometimes you just have to go very slow. I've seen people with whites machines going very fast.

 

[dippodigger]

good tips here guys. I am going to up my gain another notch or two. Makes perfect sense to me. thanks again.