Greg (E.Tn)
Well-known member
Last week, I performed a test w/ the new F75 LTD with discouraging results.
But maybe explainable results.
I have a friend who has a "Civil War" Test Garden. He has a Read Artillery Shell buried at three feet, and a US Belt Plate buried flat at about 18 inches. The F75 LTD would not hit satisfactorily on either of these items.
Settings initially used on both were Cache Mode, 0 discrminate, 1 notch, sensitivity as high as it could be cranked.
After negative results, I tried different settings in DE, JE and BP modes, with Disc set anywhere from 0 to 40.
Again, negative results.
Two factors were possibly at play--extreme ground mineralization, and EMI issues.
My friend's test garden is located about fifty feet or so from a municipal airport runway, which I am sure puts out its fair share of EMI and other eleictrical interference. Secondly, the machine would hit good on the plate during an air test , but when it was placed in the hole, at depth, the machine would not hit on it at all.
However, I noticed that when I dropped the sensitivity way down below 50, I got a chirp from the buried belt plate, but nothing near the signal I was getting on the air test.
I understand that a lot of this could be chalked up to "operator error." However, at the same time, it is not encouraging to think that I might be missing belt plates at depths that SHOULD be detectable by this machine.
But maybe explainable results.
I have a friend who has a "Civil War" Test Garden. He has a Read Artillery Shell buried at three feet, and a US Belt Plate buried flat at about 18 inches. The F75 LTD would not hit satisfactorily on either of these items.
Settings initially used on both were Cache Mode, 0 discrminate, 1 notch, sensitivity as high as it could be cranked.
After negative results, I tried different settings in DE, JE and BP modes, with Disc set anywhere from 0 to 40.
Again, negative results.
Two factors were possibly at play--extreme ground mineralization, and EMI issues.
My friend's test garden is located about fifty feet or so from a municipal airport runway, which I am sure puts out its fair share of EMI and other eleictrical interference. Secondly, the machine would hit good on the plate during an air test , but when it was placed in the hole, at depth, the machine would not hit on it at all.
However, I noticed that when I dropped the sensitivity way down below 50, I got a chirp from the buried belt plate, but nothing near the signal I was getting on the air test.
I understand that a lot of this could be chalked up to "operator error." However, at the same time, it is not encouraging to think that I might be missing belt plates at depths that SHOULD be detectable by this machine.