Anybody encounter this situation?

[Phillip_in_NM]

At the end of a totally fruitless ghost town trip we stopped at an older city park which apparently hadn't been hunted in a while. It was all modern change, but fun nonetheless. Weird part is: Of the 21 quarters that I dug, not a single one showed up on the 12 ferrous line. All the quarters showed ferrous of 04 to 09 and conductive of 48-50. Of the 15 dimes, all were 12-46 to 12-48, pennies were 12-44 to 12-46. Most of the quarters I've dug in the past were 12-47 to 12-48.

Found $6.95 in change in less than an hour, but the readings sure seemed higher than normal. Any ideas?

 

[NebTrac]

Yes, I've had that happen quite often. I even opened up my Fe50 line, because though the modern quarter would hit Co 48 or 49, when I dug and wen to pinpoint with the X-1, I'd null. It seemed though for me, a lot of the time my reading was 01-50 when pinpointing.

I don't have an answer, other than moisture conditions, soil type and channel selection. Which is usually what I can use an excuse on 85% of the time on these scenerios.

NebTrac

 

[moonshine]

the only thing i can think of, and i dont want to conjecture or start false rumors, but ive noticed my numbers seem to change based on what channel im on. im not sure if im imagining things maybe.

also maybe the soil type or moisture content?

 

[MHirschmann]

You are absolutely correct. Changing channels can/will directly affect the target ID. WHat channel were you hunting in Phillip? This could be the answer to what you were experiencing. If you auto noise cancel, maybe it chose a channel that you don't normally use in other areas that you are used to hunting, therefore you weren't used to the shift in TID's. I posted a thread about noise cancel channels last week because I am trying to get a better understanding of what exactly is going on there. One thing that I have concluded, for sure, is that TID's are directly affected by the noise cancel channel that you are using.

Hope this helps -Marc

 

[moonshine]

all right well let me throw this out there. i was switched to channel 9 and i noticed that all coins CO numbers were about +2 than what i was used to. pennies reading at 44 for example. again please dont take this as gold, its been days and days since i noticed that in particular.

 

[nge]

Ditto, same here. I noticed that a while ago, my clad dimes have been hitting on 44-46 conducive. They usually hit around 41 or 42 conducive, when I looked at the channel that auto tune picked, it was different than what it usually picks, my machine normally picks channel 11, so I manually put it back there and my numbers went back to my normal numbers.....nge

 

[MHirschmann]

You say you switched to channel "9" but you didn't share what channel you switched from.

Also certain pennies will read higher than others regardless of what channel you are on. I dig copper pennies at 44 on just about every hunt. Pennies can come in all over the place so I personally wouldn't recommend using pennies to gauge the "shift" we are talking about in TID's. More consistent coins to observe would be clad quarters and dimes vs. silver quarters and dimes. These coins generally give a very stable response so their variance in reaction would probably be the best coins to test the response of different noise cancel channels with.

If you end up testing it and getting some answer, please share them on here. -Marc

 

[Phillip_in_NM]

Very interesting ideas. The soil in the park was pretty moist - very moist by New Mexico standards so maybe that was part of it. The channel theory is also very interesting. It seems like 90% of the time that I've actually noticed what channel the noise cancel selected that it selects channel 9. I know we discovered earlier that gold was detected better on channel 11 than the other channels. Maybe the same thing is going on here.

I've got a buddy who loves to test and quantify everything. I'll have to set him on it!

Thanks for all your input.

 

[Grizzly13]

There are alot of variables to this phenomenon. I also have noticed that I always need to noise cancel after I set up my sensitivity and everything else, deep on/off, fast on/off . The noise cancel is the last thing I do, this seems to effect everything. I usually run in manual sensitivity and I loose my dept but it really is irrelevant to me.

 

[moonshine]

MH, I think it was from channel 6. I made a note to myself to switch channels and investigate if there is a difference at my test garden but just havent had time.

 

[Tenspeed]

That is an interesting change in ID numbers and the fact that the channel may be what causes it. I usually see dimes at 45 but lately they have been showing up at 44 where a penny usually is. I have seen copper pennies run all the way down to 40 (which is approaching zincolns) but the tone usually gives them away.

I always ground balance before I hunt, so I will have to start looking at the channel to see if different channels give me different ID's.

Thanks for the great discussion to get the sharing of experience going!

 

[Phillip_in_NM]

Well, this discussion has been a huge learning experience for me. Now I'm wondering if some of the programs I set up = Bill_S's trashy park program for example - might be knocking out some very desirable targets based on the skewed readings I first described. What do you guys think? Should I be manually determining the channel for certain discrimination patterns?