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Iron targets register in the upper 80s or 90s as a natural result of "target wrap-around", meaning that if the VDI numbers were arranged on a circular scale like the face of an old watch, with numbers 12-11 on its face being replaced by numbers 1-95 on its face, the iron numbers that are from large iron targets that are too big to be rejected by the discriminate mode will SOUND like silver and give such a large audio that they Sound like Silver, but of course, are NOT silver, but iron. Even the iron audio sound setting will not eliminate all large iron objects or even smaller ones near the surface. For example a 10" cannon ball 20 inches down will give a high signal, especially if you aren't Zeroed in on it. But even then, it will sound good-and if a pistol or cannon ball on a battle field gives such a sound, it could be quick a nice Find.
I see it all the time Jeff. Rusty nails or rusty pieces of scrap iron hit in the 80's and 90's on my machine too. No biggy once you get used to it. I think your machine is fine.
HH, mac
Bent nails and old tin cans almost always ring off high numbers... I noticed when I pinpoint on coins or rings, the low volume tone (the tone everyone loves) rings easily. When there are bigger, ferrous, or corona caps, the pinpoint tone is usually loud. When you hear a triple signal, three times over a target, you're usually over a target very close to the surface. In this case, try raising the coil higher off the ground and sway again. You should be able to notice where the target really is.
