My F-75 often ID's deep, old pulltabs as High Conductors

[ziphius]

By deep, I mean deeper than 6 inches. Often, they are small pieces of beavertail or modern pulltab. They will ID in the high 70s to low 80s, until I pull them out of the hole, then they ID as a mid-tone in the 40s to 50s. Sometimes, I can predict it is a pulltab by swinging over the target from different angles and a pulltab/beavertail will fall back into a mid-tone range on one or more of the swings. But not often enough to eliminate the annoyance of getting fooled. Anyone else run into this and come up with any insights?

Jim

 

[jim tn]

Yep, I have experienced that as well. In my case they are usually the ring or even the full tab. Like for you, this usually occurs at depths of 7" or more and read in the quarter range and sound pretty good, too. They do tend to be a little bouncy on the tid, but unfortunately, not enough, not to dig. Fortunately, I don't run into those deep one's all that often. Another guy I know that swings a F 75 has related the same thing. HH jim tn

 

[Elton]

I would rather dig em than miss a nice seated quarter. I find if hitting a few in an area, doing a two scoop hole on the second check before scoop it id's much lower..but not always..My complaint is the rusty steel bottle caps GRRRRRRRRRRRRRRRRRRRRR

Can not get rid of them beeping good signal no matter what I try.............

 

[daryllpugh]

I've ran into this at a carnival site that dates to the late 1800's. The coins are more smaller and consistent in tone and id. Also. If your read your manual? You'll remeber were they talk about raising your coil over targets. Practice this. It helps to learn the difference between good and bad targets. Even if they are deep. I still dig a few of the metal bottle tops. But usally I can tell if it is one. Older deeper coins will have a broader response like bottle tops. If you pin point the target. Move off to one side and then sweep the coil real fast over it. If it's a coin it's going to be right on every time. If it's a pull tab or bottle top usally it will fuctuate and be eratic on the vid.