No coin "finds" yet, but I did make a test field to run my F70 through. No idea if this is good or bad performance. I Buried 3 of each coins (penny/dime/nickel/quarter, and some misc items). 3 of each coins, exactly 8", 10" and deep ones at 12"-13" depths, in hard packed soil, 70 ground balance average #'s. Spent several hours comparing each coil back and forth, stock vs 11"DD, same settings per each go'round. With either coil, it is hard to get by any of the 8" coins. On the 8" and 10" coins, the DD's longer search swath became apparent. The stock coil seemed to hit dimes harder than the DD did, the DD hit harder on the nickels.
The stock coil did "better" on the deeper 12"-13" dimes also, but had to be dead on (like a very pointed search cone). The pinpoint depth actually showed 12 or 13 on the depth display. Missed the deep nickel a few times with the stock coil, missed the deep dime a few times with the DD and I think it looked over the deep penny a couple times with either coil. I think it easily sounded on all the deep coins about every time.....just no display # sometimes (what I was referring to as a miss).
Keep in mind I'm brand new at this whole deal, but have been working alot with my F70 and it's settings.
Prettymuch been using allmetal mode, 90-99 sens, threshold usually 5 or so & SL speed, ......or...... 0 disc,2f tone (single tone seemed to lose or miss stuff), 90+ sens, De, 0 to -3 thresh.........little bit of chatter when running either program(i'm sure it will vary ). Do get more chatter in the SL mode, and SL does provide a bit more depth than the De mode........up to 10" depths both modes did fine though. *(settings from memory, might be off , don't have machine with me). Also found that with the wrong settings you can miss the the not so deep stuff and easiy miss the deeper stuff that is very easy to hit with the right settings!
Both pinpoint and ground balance great.
