[quote MattR]Hi all!
Coin finding.
Silver is the easiest to find, therefore the first to be depleted from any location (pro rata). Naturally, copper comes virtually in the same conductivity bracket so ranks with silver.
Size and depth of either dictating their detectability.
That fact stated, therefor means that on any previously worked site these should become rarer finds, after each visit.
As for the Ace 250 versus F75 finding capabilities, well thats more down to the user's understanding of each unit's fortes rather than any limitations of the detectors.
It's a subjective comparison to make and one that serves little purpose unless the poster clearly states all the parameters which he uses for each unit. Also, admitting his limited understanding, experience, or proficiency of either detector.
If you screw a site for 12 months with ANY detector, then whatever you follow with has less of an opportunity to show how well it would have done if it were the first to be used there.
Also consider the frequency of each unit
If they differ by several kilohertz then each will peak in efficiency differently, depending on ground conditions, trash, and target to trash proximity and density.
Differing search head sizes and formulation, render derogatory comparisons meaningless unless such observations are accompanied by explanations of the writer's appreciation of why.
The F75 or T2 will hold its own with any detector in the general run of things. It will beat most others when a site has been supposedly 'cleaned out'
THAT IS, IF THERE IS ANYTHING LEFT TO BE FOUND.
That relates to location, intrinsic ground conditions and trash density (if any). .
Too many posts on metal detecting forums are naive,and their queries lacking in detail, making a constructive reply, difficult.
The Ace 250 is a fine unit, and if I remember correctly (its 6.5kHz operating frequency), is the optimum for general coin shooting and discriminatory resolution.
The F75's 12/13 KHz is more about sensitivity to any target material and its relative 'thinness/size'.
Try standing still and detecting carefully the ground around you.
It may amaze you what a focused search can produce....MattR.UK.
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I've spent the better part of the last month and a half (on and off) searching the same area of a soccer field complex that's probably 20 metres by 10 metres. I've used primarily the F75 but also the F4. I'm trying to find a tiny ring that a girl lost which has been in their family for 3 generations. EVERYTIME I search that area, I find a huge number of targets. Very few are "reseeds" dropped by the fans. I've gone over that patch from left to right, right to left 4 way diagonals, you name it, I've probably tried it twice. The fields are a great learning spot because the soil is great, there's very little electrical interference, if any, and the digging is very easy. The point being that although many of the variables are fairly constant, the number of targets
is diminishing due to all the pressure. The
really impressinve part, however, is that I STILL FIND SOOOO MANY TARGETS.
Tagamet