• Not being fully familiar with the Racer 2's adjustment settings.
• Not knowing what the sample targets are made of, and that can be a problem with the Discrimination level used.
Dataman said:
Well went to my local park for some testing not to hunt just try some different soil, machine was in full factory mode, default settings.
Started of by lowering the gain to 45 this calmed the machine down...
By "full factory mode" do you mean you selected the Default setting and restored all programs to the factory default?
After doing that, did you adjust the Gain to '45' do to EMI 'noise' in the area? Was that determined with the search coil held well off the ground or with it at about an inch-or-two search height? Remember that a search coil held in the air or waist high will be more susceptible to EMI that might not bother it if the coil is positioned closer to the ground mineral at a proper search height.
Did you make adjustments to ID Filter or anything else?
Dataman said:
... and tried the elusive 10 pence from 2014, now this looks in mint condition and is very shiney,
Appearance doesn't matter unless the coin was bent, cut, or had hole(s) in it, or unless there was some terrible build-up on the outside such as rust or some poor-conductive matter, etc.
The 10 Pence, if we are referring to British coinage, used to be made of a more noble metal, and prior to 2012, the coin contained 75% copper and 25% nickel [size=small]
(Cupronickel)[/size]. Since 2012, the coin has been made of steel and plated with nickel, and that's what likely gave the newer coin the 'shiny' outside appearance. It is also what helps contribute to poor coin detection.
Ferrous or magnetic-based metals, and that includes Iron, Steel and Nickel, have a different effect on a detector's EMF [size=small]
(electromagnetic field)[/size] than will a non-ferrous metal/metals, such as Aluminum, Copper, Bronze, Gold, Silver, etc. Not only do ferrous metals effect the EMF differently than non-ferrous objects of the same size and shape, but they are generally lower-conductive and more easily rejected [size=small]
(Discriminated)[/size].
Not knowing the amount of Discrimination/ID Filter you are using, or the sweep speed used, that can effect the ability to 'detect' or 'beep' on some targets such as this one.
Dataman said:
... into the soil at around 5 inches, bedded down, nothing not a sound and barely a sound from deep mode.
Was the coin positioned flat in the ground so as to be flat-to-the-coil and not on-edge or canted? What was the Ground Balance required or used at the site? How strong was the MMI to suggest iron mineralized ground? Other factors, such as the sample target being 'fresh buried', can have an effect to impair detection.
Dataman said:
I tried the 2 tone and the 3 tone at various gains and got very little back.
Again, without any of us being there to know all the variables, such as ALL the settings and not just Gain, it is difficult to comment with certainty. That is, I will state that in most mineralized environments I don't have a problem hitting similar size or type of targets at that depth, but I almost always hunt with a rather low ID Filter/Discrimination setting.
Dataman said:
But this is where it gets interesting I had a 2012 coin same design but worn and tried this and guess what it picked it up very clear but with a slight iron grunt at the end of the pass.
It might have been that you had an earlier mintage alloy mixture and it was a Cupronickel and not Steel with a Nickel plating, and that would have made it more conductive.
Dataman said:
So my feeling is shiney coins are harder to pick up as the slight oxidation from what ever alloy is in these coins are what the racer is bouncing of, does that make sense.
No, that doesn't make sense. The transmitted EMF doesn't really "bounce off' the coins. Metal objects will disrupt the EMF, generally in one of two different ways, and the blink-of-an-eye effect from the signal being absorbed by the metal object and the new EMF generated on/from the metal object will cause the changes that the detector circuitry will receive and process. That nickel plating on the coin that made it shiny isn't an interfering oxidation but just a plating of Nickel, and depending upon the thickness, the coins alloy make-up absorbs some of the EMF and that new field generated about the coin is then detected. The received signal is processed, and
based upon all your settings ...
to include rejection of lower conductive targets ... the detector might pass along an audio and/or visual target response ....
if accepted.
Dataman said:
Any how I had a quick hunt around the edge of the field and came up with a silver opal ring much to my surprise, so it likes silver today as well. This was still in 40 gain as well so around 4-5 inches down not deep at all.
A 4"-5" deep ring is not really a shallow depth, and the Racer 2 is quite capable of hitting on accepted targets to very reasonable depths, even as your Gain of '40' might suggest. Congrats on the ring find.
Dataman said:
Happy now.
Thanks for the insights guy's.
Stay Happy! Enjoy this New Year, and have faith in your Racer 2 as it is an excellent detector. If not it wouldn't be in my arsenal, and it is very capable of finding deeper-positioned targets. It's all a matter of learning and understanding the best settings to use, selecting the right search coil for the site, and being patient while using a proper sweep speed.
Oh, the 6 Pence coin you used [size=small]
(if made from 1947 to 1970)[/size] was of Cupronickel and therefore a much more conductive coin than the magnetic-based metal 10 Pence coin discussed earlier.
Monte