Digital Meter and various coils?

[Ray Hogan]

Does the digital meter maintain its accuracy with different coils such as WOT, SEF, Sunray, etc? Thanks, Ray

 

[Ron from Michigan]

Ray a simple recalibration for the meter is usually required with a coil change.The 550 Digital readjust 550 for a US Quarter. and Digital 180, Sunray,Avenger or Nighthawk 180 for a US Quarter.HH Ron

 

[Ray Hogan]

So, if when changing coils you recalibrated a 180 meter to 180 for a dime/quarter/etc, it would then indicate a number for a nickel that would be consistent with another coil? I quess, showing consistent numbers "across the board" from coil to coil? Hope that question makes sense, ha............Ray.

 

[Critterhunter]

I haven't heard of any coil that the Sovereign meter wasn't able to calibrate to. That's one of the great things about the Sovereign, some machines can get a bit off wth their target ID when coils are changed.

 

[Ron from Michigan]

Ray, 180 meters the Sunray,Avenger,and Nighthawk will read different numbers for nickles.The Nighthawk I had read nickles around 149-150 for most nickles.The Avenger and Sunray are close but still read a little different.Never used a Minelab 180 meter only the 550. HH Ron

 

[Barry]

Ray,
As an example--I have 3 coils for my Sov--Standard 10" tornado, 8" SunRay and 12" Sunray.
Readings on an Aussie dollar are. ( as set for 8" coil )
8" coil---- 150
10" coil--- 165
12" coil--- 153
You can recalibrate each coil to 150 or memorise the numbers.
Regards,
Barry

 

[Ray Hogan]

Thanks Barry, but if you were to recalibrate all to 150 would another different coin show the same consistent number on all your coils? Thanks, Ray.

 

[Ray Hogan]

and thanks to all, because I have learned a lot from all you guys. Here goes. Let's say, with a factory Minelab coil, you calibrate to 180 for a quarter/dime and then check a nickel and the meter reads 148. Now you switch to another coil, maybe a SEF, and recalibrate to 180 for a quarter/dime. Now, when you check a nickel with the second coil (SEF) will the meter read 148 as it did with the first coil (Minelab)? Thanks for your patience. Ray

 

[Barry]

Ray.
My finding is yes. Once you recalibrate to another coil all readings for all coins will be the same.
eg
10"coil calibrated to aussie dollar =150
aussie 50c =144
aussie 20c = 139
recalibrate the 8" or 12 " coil to read 150 on aussie dollar and the 50c will read 144 and 20c will read 139
These readings are in air and will vary with depth. Also I find switching to the other noise cancelling band will change the base reading by one or two numbers, but the difference between coins will always remain the same eg 150,144,139 could become 148,142,137.
Regards,
Barry

 

[Ray Hogan]

n/t

 

[Critterhunter]

So all numbers will match so long as you re-calibrate the meter then? I know changing to noise band 1 can alter the nickle range of numbers but never thought to ask if coils would do that. From what you're saying it looks like they won't change. But, from what Ron is saying different meters can also alter the nickle numbers? That might explain why my custom chart in band 2 doesn't match some targets to the old charts which should if you're in band 2.

 

[Art (NWOH)]

I checked out a handful of nickels one time and found that there can be considerable differences in conductivity.
The best solution I could come up with is this....
If it sounds like a nickel and gives close to a nickel reading, then dig it....unless the reading is distinctly a tab number for the location.

HH

 

[Rick(ND)]

You are like me and not responding to post like we used to, but been reading a lot of them and I felt like jumping in on you post as this is something I strongly agree on. Nickles have their own tone really once you have dug a few you will know it. On nickles I have seen as low as 139 on some very deep one and as high as 151, but they seem to have the nickle tone to them. War nickles even the same year and mint marks can range from 143-151, but have that nickle tone to them. I have even seen a couple war nickles sent to me to try that read as a new zinc penny (176-177) in some area around the country. Most nickles in band 2 of the GT will be 144-146, but in band 1 they will read as high as 148. We have found that band 2 works better also and only use band 1 if bad 2 has to much interference or hunting close to another Sovereign.
On the differnt meter the numbers may change by a number or 2 on nickles, but the 179-180 numbers seem to stay the same on all coil and all meter once calibrated correctly, nickle can varry 1 or 2 numbers from all I have used.

Rick