I would definitely dig "C" size targets. Large cents and silver quarters were some of the gifts that have popped out of the ground. The imaging, depth, and target ID are "PROBABLE" target indicaters, and are influenced by mineralization, how long the targets been in the ground and angle of the coin. If I were you Steve, I'd go back to some of those spots and do a little more digging. My test garden definitely shows that what is in the ground, does not always register 100% on the ID. Any deep target should be "played with"......do circles around it and cross it from different angles. Any hint of it going into the coin range should be dug.
Posted By: John-Edmonton <Send E-Mail> (px1ar.ed.shawcable.net)
Date: Sunday, 2 May 2004, at 12:19 a.m.
In Response To: don't keep us in suspense. what's the pattern you discovered in your test garden with deep silver, pray tell (joemack in IL)
OK Joe, in my type of soil, it kinda works like this. My test-garden has numerous deep silver coins, well beyond the threshold level. My 1500 can't even whisper a sound on the deepest ones. No problem with that. However, the deepest silver coins that begin giving a response, tend to give that low metal groan with no discrimination, IDing them as bottle caps or lower. "BUT", if you continues to play with that signal, you start getting some spikes in the coin range. Looks Like junk, sounds like junk. Normally I would have moved on. "BUT", when you read the depth, you get a constant value as long as you remain absolutely centered on the target. The depth reading will not necessarily be accurate, but the key is that constant depth value.
So, that's what I tried in the field (so far). I found a low groan type signal, played around with it, got some spikes in the coin range and got a constant depth value of 5. So, I dug it, and out popped a 1918 silver quarter. It was found about 5 feet from a goal post. I can't even imagine how many other machines also recieved a poor quality sound on that quarter, and just let it be. Hunting in front of a goal post in a soccer or football field is a prime area for finding lots of coins. No secret there. I also got the old penny with the same type of reading.
So, that works in my territory. Our soil has very low mineralization. I can usually run my machine around 11 to 11 1/2. So, my