Find's Treasure Forums
Welcome to Find's Treasure Forums, Guests!
You are viewing this forums as a guest which limits you to read only status.
Only registered members may post stories, questions, classifieds, reply to other posts, contact other members using built in messaging and use many other features found on these forums.
Why not register and join us today? It's free! (We don't share your email addresses with anyone.) We keep email addresses of our users to protect them and others from bad people posting things they shouldn't.
Click here to register!
Need Support Help?
Cannot log in?, click here to have new password emailed to you
Changed email? Forgot to update your account with new email address? Need assistance with something else?, click here to go to Find's Support Form and fill out the form.
Just some air testing of coils on my Tejon
- Thread starter WV62
- Start date
Sven
Well-known member
Here's the air test I had done back in 2008 with the stock 8x9 coil.
Looking at settings 1 and 2 sensitivity at 6 and 10, would have thought there would have been more of a difference.
As for the Disc control setting, didn't write it down. Did test at the same time as the Cibola and I have pictured the setting of disc right at iron.
Will assume the Tejon was set at the same point.
Makes for another good reference
Looking at settings 1 and 2 sensitivity at 6 and 10, would have thought there would have been more of a difference.
As for the Disc control setting, didn't write it down. Did test at the same time as the Cibola and I have pictured the setting of disc right at iron.
Will assume the Tejon was set at the same point.
Makes for another good reference
WV62
Well-known member
Interesting results, your machine seems to be a little hotter than mine. I only run the one test at what I thought would be max, I ran the sensitivity up until it started chattering and then back it down just until it stopped.
I ran all the coils using the same settings mainly to see the difference in the coils.
Thanks for sharing your results,
Ron in WV
I ran all the coils using the same settings mainly to see the difference in the coils.
Thanks for sharing your results,
Ron in WV
WV62
Well-known member
I went from the manual for GB for air testing.
From the manual: To set the Ground Adjust knob for the air test, turn the knob four turns clockwise and then turn the knob one half turn counterclockwise.
That may explain why my numbers were a little less than Sven's.
Now that I have Sven's numbers to shoot for, I may set everything up with just the 9x8 coil and see if I can come close to his. I will most likely only use my 4 silver coins because if you think about it I can find clad all day long and it will not be all that deep. The silver dime is really my standard, and I just like to know about the silver quarter, half and dollar just in case I would run across one.
Ron in WV
From the manual: To set the Ground Adjust knob for the air test, turn the knob four turns clockwise and then turn the knob one half turn counterclockwise.
That may explain why my numbers were a little less than Sven's.
Now that I have Sven's numbers to shoot for, I may set everything up with just the 9x8 coil and see if I can come close to his. I will most likely only use my 4 silver coins because if you think about it I can find clad all day long and it will not be all that deep. The silver dime is really my standard, and I just like to know about the silver quarter, half and dollar just in case I would run across one.
Ron in WV
...but I'd bet the biggest factor in depth difference is going to be soil mineralization, and how little ground compensation you can get away with. Mild soil, and you don't need to dial in so much positive to compensate. I see quite a difference in airtests when I can run it negative. Same when I'm in a deep pile of composted vegetation; crank it negative and gain lots of depth, without losing any stability.
WV62
Well-known member
Sounds good to me, but at the time I was testing I wasn't looking for max depth, just the difference in how each coil acts on the Tejon. My thought was to keep everything the same and I would be able to see just the difference the coil makes. I did use pretty hot settings except for sensitivity.
I can see another round of testing coming, and I will try for max depth and see if I can improve my numbers.
Ron in WV
I can see another round of testing coming, and I will try for max depth and see if I can improve my numbers.
Ron in WV
Sven
Well-known member
Air test is only an air test, good for a reference point only in determining proper functioning of a detector.
As soon as you throw in any soil matrix, air test numbers go out the window. Depending upon the soil, you can easily lose 30-60%
actual ground depth compared to air depth.
After an air test just to see and compare how much depth loss, I have a tub of soil about 6" deep. Place the target under the tub after ground balancing to the tub of soil.
You might be surprised what you see, also many target ID machines will down grade target ID numbers towards the iron range. Target Id in air might be spot on, under the soil
its different. Just a thought ever notice why you don't find the smaller gold with a target multi-tone ID machine? It's falling into the iron range that is disc'd out.
Higher frequency detectors seem to air test at greater distance than low frequency detectors. High frequency detectors also lose more ground depth
than lower frequency detectors.
As soon as you throw in any soil matrix, air test numbers go out the window. Depending upon the soil, you can easily lose 30-60%
actual ground depth compared to air depth.
After an air test just to see and compare how much depth loss, I have a tub of soil about 6" deep. Place the target under the tub after ground balancing to the tub of soil.
You might be surprised what you see, also many target ID machines will down grade target ID numbers towards the iron range. Target Id in air might be spot on, under the soil
its different. Just a thought ever notice why you don't find the smaller gold with a target multi-tone ID machine? It's falling into the iron range that is disc'd out.
Higher frequency detectors seem to air test at greater distance than low frequency detectors. High frequency detectors also lose more ground depth
than lower frequency detectors.
BarberBill
New member
I agree with Swen, an air test is only an air test, but they are useful in comparing different coils and/or detectors. Also, they can serve as a check point to see if a detector's performance has dropped over time.
BB
BB