I would say MTF over TTF there is no real advantage but for me it gives me a extra clue as to what the target is, say big or small silver or penny. I would dig all those targets but I dig harder if I think that is silver half dollar down there. LOL
Here is the rest of my today's settings and notes to myself for those that may be interested.
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Ron’s E-Trac Settings 3/14/20
Sensitivity = Minimum setting for max air testing depth for each coil.
5” coil = minimum sensitivity @26, so far most deep coins found
8x6” coil = minimum sensitivity @27, nest in line for deep coins but this coil is newer.
11” stock coil = minimum sensitivity @25
13” coil = minimum sensitivity @27
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Threshold level = (20) barely audible for me, adjust Threshold Pitch first
Volume limit = (30),
Volume Gain = (20) at this setting it gives me a sound of something deep. Air tested this with big and small silver to get a different volume at max depth.
Response set for = (Long) (Normal), (Smooth), (Long) the manual says long may add some depth. Don’t think I would use (Pitch Hold) \—Need to work with long response
Tone ID set for = multi Tones, (1) tone, (2) tones. Just pick what you like 1, 2, 4 or multi tones
TTF, stands for 2 tone Ferrous, 4 tones Ferrous gives best tone ID between small and large silver
Sounds set for = (Conductive Ferrous), conductive some say is best for coins. (Ferrous) some say is best for Relics and jewelry.
Variability = (30),
Limit = (30) Leave set at 30 but only works when tones are set to Multi.
Threshold Pitch = set first, (24) (15) for me, once you get what you like don’t change this one it makes everything sound different.
Deep = (off) in high iron trash, with low iron trash run on. Also deep ON slows the response speed down, more filtering. On=Better ID. On and off air tested the same. So off should get better separation.
Fast = (off) if the trash is real bad run this on. On=Filters off, off = filters on with better ID
Trash = (high)
Ground = difficult
Noise Cancel = Run this manual between 2 thru 4. So I pick 2 or 3 the machine seems to run good at these numbers. For auto, run it several time and go with one it most hits on.
Notes:
Slow and low sweep, listen for repeat signals. I like the shorter mini strokes and push the grass down. Listen for any high tone (squeal), check depth, and then work the numbers. Note I found a 1919 penny, 3 silver dimes and 1962D silver quarter with the little coil at the park sled run at 6”+ and only had high tone, no repeatable ID numbers.
High tone one direction, low tone at 90 = iron
Have fun Ron in WV