Omega 8000 question.....

[James/Washington]

I have been detecting many years and have owned many detectors. I have a Fisher F75 that I love but wanted a backup detector that would be a little lighter and allow me to stay in the field a little longer. After lots of videos and reading many articles on the F5 and the O8, I purchased a used, in almost new condition O8. Got it Monday. Have had it out the last three days in a row for about one hour each day. This detector rocks! I have not noticed any EMI problems and have been running the sens to 85 with no problem. O8 is totally quiet unless I set it on the ground to recover a target and then it will give some sounds but not enough to be a bother. I dug quite a few screw caps until I learned the numbers. I am a park/school hunter and vacant lot/homesite hunter. Rarely relics. The places I hunt are extremely trashy! Therefore I am usually hunting with heavy disc accepting only nickels, copper pennies, dimes and nickels. If I find a place that is not too trashy, I will hunt in all metal.

I was playing around, doing some air testing in my computer room full of EMI. As I was doing some adjustments, I turned the sensitivity ALL the way up, turned the disc ALL the way up and then notched Nickels back in. To my surprise, the detector was falsing only slightly and the volume was really high(good for me as my hearing is shot) and the depth on air testing was great. I have not used this setup in a hunt yet and was wondering if anyone out there has run this setup???? Any comments?

 

[detectingMO]

That setup works well to quiet EMI noise but the EMI is still present. If bad enough depth will still suffer and if the emi hits hard enough the machine has to recover to hit a good target. so sometimes you can miss a target. This is only the case if emi gets bad around 40-50 sense. If higher typically it's not a huge deal for the recovery just some depth loss. If only copper/silver/nickel hunting disc to 79 and notch in nickels. run around 80-85 so you have room to turn up on faint deepies. You'd be hard pressed to find a better coinshooter. If you want zincolns too lower disc to 74. If you want to include indians as well disc at 69. that will cover about 95% of all coins or more.

If you want the nickels to have a different tone than the zinc range when using disc lower than 79 use 4 tone. I'm not a fan of the nickel high tone, sounds weird, but it's one way to hunt 3 tone only coins. In 3 tone you'd really only have 2 tones for coin huntering. Speaking of tones, if in an old site and you are digging mostly non-ferrus you may just use 2 tone. It's a little deeper but much better unmasking. Especially with disc at 16.