Ok I was out hunting today with the F75, with settings of DE mode, sensitivity 65, Discrimination set at 5, notch at 1. When I locate a target and pinpoint, the almost always tells me its deeper then it really is. It will tell me 5 inches and it really is 2 inches deep. Is there something I am doing wrong or is the F75 set up wrong? I have been out with the F75 before and never really noticed it not giving me the right debt. Any Ideas..............
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Problem with F75 LTD.........
- Thread starter tomjj
- Start date
Big Boys Hobbies
Well-known member
Tom, pin point is "set" for coin sized targets. Usually penny/dime. Bigger or smaller targets will be off on depth. If it's on edge it will effect reading too. All machines are a bit off on pin point depth sometimes.
Don't forget there is often an air gap that exists between the coil and the surface of the ground and we never think to account for that when we estimate the depth of the hole. At least it took a while for me to remember to add that back in as I always measure to the top of the hole not the coil height. Hope that helps! 
Tom
Tom
TerraDigger
New member
The design of the 11" DD coil, due to the nature of using overlapping coils to create a DD, will sometimes cause erratic/erroneous readings within 3 inches of the coil's bottom. If it sounds like a shallow target, try raising the coil 3 inches, then do depth reading.
Let us know if suggestion works or doesn't work.
Let us know if suggestion works or doesn't work.