for a couple of hours. Ran All Metal with the Sensitivity to 95. No problem whatsoever with the machine chirping.ID was only fooled one time by an axle washer off of a wagon at about a foot deep. Dug the end of a Burnside cartridge at about 10 inches. Interesting that I got a number of pistol balls, too. I don't really know if the Discriminate Mode would have got them. IMHO, the F-75 hunts deeper in AM that the Coinstrike does. I think that this will make an excellent relic machine.BTW, I like the ability to change the audio freq. on the AM since I am hard of hearing...instead of running up in the + numbers, I ran -6 and I could hear the machine a lot better.
When I go back back hunting in a day or so, I am going to try Disc.Mode and set the disc to zero and single tone of 2 tone. That will be determined by which is more accurate, the visual ID or the tone ID...Too, if the F-75 is like most other machines, less disc. means more depth. Best to all, RichardnTn
Authorized Fisher Dealer
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When I go back back hunting in a day or so, I am going to try Disc.Mode and set the disc to zero and single tone of 2 tone. That will be determined by which is more accurate, the visual ID or the tone ID...Too, if the F-75 is like most other machines, less disc. means more depth. Best to all, RichardnTn
Authorized Fisher Dealer
A Findmall Sponser