bottle cap rejection revisited

[Neil]

I tried the suggestion someone made a while back about a problem I am having with bottle caps coming in at 40 and 42 with a good solid tone and ID number lock. It was suggested to switch over to prospecting mode and try that for ID purposes, even ran it up to the 20 max and still sounded great.
For some reason my 70 only gets fooled on them in dark dirt. On the beach the numbers will jump around and the tone is scratchy. I ground balanced several times and also noise cancelled. The GB was always mid to low 50s. This morning I was running the sens up to 15 and no higher, just way to much garbage in the ground, iron decaying I mean.
Any other suggestions?

Thanks much,
Neil

btw I was finding coins easily enough with solid ID and tone. This time I used the high freq 10.5" DD coil and last time out I was using the med freq 10.5" DD so both coils are fooled by the bottlecaps. Kinda reminds me of the Minelab Advantage, I could ID the bottlecaps better on the beach but not to good in parks or woods. My Sov its no problem with the ID or an Explorer either, but the faster response of the 70 makes it the one I want to use in real trashy areas.

 

[Bowie]

Heya Niel,
I dont have a XT but have become interested in the 70. I presently use a M6 and have doubts about its depths in the nastiest spots I hunt but I dont have problems with bottle caps especially after I have made multiple swings.
Will you keep us posted on your finds or solutions to that problem.
Thanks,
John

 

[willy]

I found that the DD coils don't do a very good job on bottlecaps. Instead, I use my concentric coil and pop over to prospecting mode with the iron-mask maxxed. It would be nice if ML would come out with a 6" HF concentric coil. I'd even use it for prospecting. ..Willy.

 

[Neil]

Thanks Willy. That could be the answer. I sold off my concentric coils so I guess Im stuck digging bottlecaps

HH
Neil