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  1. S

    Great alternative test garden-judge for yourself

    Folks, I am quickly losing interest in posting so this will not be as thorough as it should be but I have posted a diagram of my
  2. S

    Threshold Challenge

    So we can stop beating this dead horse called threshold I propose someone demonstrate the X-terra's threshold doing something other than turning off when a target is detected. Our goal should keep the following passage from the X-terra 305/505 manual in mind. "The Threshold volume should be...
  3. S

    Goldseeker's wheat sounding like a quarter

    Hey Goldseeker, in Digger's post about audio tones you mention a 1947 wheat that sounded like a quarter. Did you get a good depth on this coin (more or less than 4 inches)? What was the soil like? (wet/dry, clay/sand/humus, woods dirt/farmers plowed field, rocks, etc). Thanks in advance...
  4. S

    X-TERRA GOLD RING ID PLOT

    Attached is a plot of one gold ring detected by the same detector coil combination (505 w. 9" MF) in two test environments. In the first test the ring's ID shifted into the iron range as depth increased (test looked at depths from 4-9 inches). In the second test the ring's ID shifted to the...
  5. S

    Xterra 505: Sensitivity/Depth Accuracy Plots

    These are plots of the data that go along with my post of 1 April 2011. I am not sure if they will post in a real usable form but this will be a good test. Enjoy- if you can open/zoom them. If it is a failure I may have to try another computer with *real* software. S505
  6. S

    Xterra 505: A more accurate way to determine depth

    I did more tests in the yard (in real dirt in the ground now) this week looking at depth indicator accuracy vs target and depth with the 505. I collected 7 data points per target over depths of 0 to 6 inches and recorded the indicated depth, IDs, and minimum sensitivity required to hit on the...
  7. S

    Xterra notches, ground balance, noise cancel, data sampling and phase shift

    Does the Xterra's discrimination scale represent a phase shift of one period? This would explain the "wrap around" from iron. Does each notch represent the same absolute phase shift or is the phase shift divided unequally across the notches? Does ground balancing subtract the phase shift due...
  8. S

    Xterra 505 IDs in dirt at depth

    I did some tests last night in dirt and found that nearly all my deep targets (>7in) gave - IDs like one would expect with iron. The targets included gold rings which started out as higher readings at 4 inches but progressively dropped as depth increased. This is with the MF 9 inch concentric...
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