All the testing was done on actual coins that i had dug up while detecting at the school where i work. It was done over a 4 hour period. I documented the reading and tone on the Ace before i dug and recorded the reading after the coin was found. Roughly the first 3" was a dark soil similar to top soil and below that was clay, some very dry and hard. Yes, some tones were different. I just took the the most popular tone and position on the panel, then recorded it as shown on the diagram. Id imagine different soils will give different reading. My finding are just based on what ive come across so far. I did manage to take $55.21 in coins and two small gold rings in that 4-5 hours. I was stoked! I still have a little more ground to cover there which will probably be tomorrow arvo.
I dug up everything, tiny bits of foil, old milk bottle tops, cans, bolts and broken toy parts. I dont think ill find and pre decimal coins given the school is only 53 years old, but thats ok, just being able to take my time learning the machine there is a bonus, and its only across the road. I did manage to coax a couple of other schools into letting me wonder about.
Many thanks Trevor for a fun machine. Even a good set of batteries that lasted me 2 outings, that was a bonus, i know you didnt have to do that. Still so much to learn.