In mineralized ground Whites made a big leap forward when they intoduced the DI Pro SL with adjusable preamp gain. The signal balance on the 6000 Di Pro SL and XL Pro is also known as preamp gain which is also found on the XLT. The amount of power that the detector emits into the ground is called AC sensitivity. The old blue box 6000 DI Pro and earlier models had an adustable AC sens. control with the preamp being preset and not adjustable. The Pro SL and XL Pro is just the opposite. The AC sens. is preset or hard wired at full power and the preamp gain is adjustable. The preamp gain or signal balance is a true sensitivity adjustment and has a greater effect on depth and stability in mineralized ground than AC sens. The trick to getting good depth is to adjust the signal balance for the coil your using and the site your hunting. I know that in most areas I hunt with the signal balance properly set I'm able to get solid lock-ons on coin size targets to about 6-6 1/2 inches with good repeatable signal but knowing the XL Pro and how coins react past that point enables me to dig coins much deeper. The XL pro and older Pro SL have the most accurate TID of any machine I've used within it's range for my mineralized ground. The audio and meter ID although not tied together are in perfect harmony with each other when it comes to depth. The Pro SL and XL pro have a non modulated audio which means as the target gets deeper the signal will start to break up and act much like a rejected target. The XL Pro is not a whisperer. The meter will respond much the same with the needle bouncing around. The deeper the target the more exaggerated the broken audio signal and meter ID become. You can use this to your advantage when hunting old parks, lawns and other areas where coins are at depth. When hunting these sites I look for those broken repeatable signals where the needle is bouncing around. Check the depth and if its beyond the normal TID range, size the target by X-ing the target while watching the needle and if it's small and deep there's a very good chance it's a deep coin or other good target. I've dug many old coins at great depth using this technique. Some deep enough to make a Fisher or Minelab guy blush!
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XL Pro, Tips for digging deep coins.
- Thread starter crazyman
- Start date
Kelley (Texas)
New member
If the meter is not locking on a target, does this mean that it is responding to an item that you have elected to block out through the discrimination control? Is it not locking because of two objects close together and one may be a bad item? Is the object too deep and too weak a signal to allow the meter to lock on? I am just confused about this subject...for some reason I am having a mental block. Any help would be much appreciated. Kelley (Texas) 
Crazyman is correct: One of the BEST Sensitivity-Gain Controls in the Industry today.
The Signal Balance system that turns the internal gain to BOTH the all metal and discrimination mode and NO Fixed Pre-Amp, first appeared in the Whites Liberty DI Pro Series in 1987. This excellent designed circuit eventually found its way into the 6000 XL-PRO.
The XL-PRO also has a NON-MOTION TR Discriminator, when adjusted properly for a maintained threshold, offers the end user superior performance in trash infestation turf conditions.
The Deeper the Coin Size Target in Ground Conditions, the more 'Dancing' back and forth you'll experience. Your All Metal Pin Point then comes into play... find the target center, back off and carefully X the target.... is it Round, what kind of Size????
Want to Go 'DEEPER' w/o that Chattering?..... Just Reduce the Discriminator down all the way and go by the meter. The other way would be to operate it in TR Discriminator which BYPASSES the motion compensators using the Discriminator to actually ground balance, and set for Iron Ignore.
The Signal Balance system that turns the internal gain to BOTH the all metal and discrimination mode and NO Fixed Pre-Amp, first appeared in the Whites Liberty DI Pro Series in 1987. This excellent designed circuit eventually found its way into the 6000 XL-PRO.
The XL-PRO also has a NON-MOTION TR Discriminator, when adjusted properly for a maintained threshold, offers the end user superior performance in trash infestation turf conditions.
The Deeper the Coin Size Target in Ground Conditions, the more 'Dancing' back and forth you'll experience. Your All Metal Pin Point then comes into play... find the target center, back off and carefully X the target.... is it Round, what kind of Size????
Want to Go 'DEEPER' w/o that Chattering?..... Just Reduce the Discriminator down all the way and go by the meter. The other way would be to operate it in TR Discriminator which BYPASSES the motion compensators using the Discriminator to actually ground balance, and set for Iron Ignore.
Kelly, I've found that the meter is very honest in telling you what's under the coil. When I'm hunting my old logging camps or mill ghost towns I dig everything that is'nt iron. I use the TID along with the depth meter and the sizing ability of the anolog more when hunting old parks where I know the old coins are deep or hunting those old victorian lawns where I want to be selective in my digging. I was hunting an old site a few weeks back with a friend when I got a signal that locked on the penny range at about 5 inches. When I sized the target using the needle side to side I got a narrow response but front to back I got a long response that indicated the object was about 4-5 inches long. I pretty much knew what it was. How honest can you be? It was a piece of copper tubing about 5 inches long. Another time I was hunting and old one room school that is now community hall with a nice manicured lawn. I got a nice signal but the meter was jumping around. It would jump between high pulltab to nickle to quarter in different order depending on the direction of the sweep. When I went to pinpoint to check the the depth and to size the target. The meter told told me it was at least 2-3 targets close together at 4 inches. In the hole where 2 indian heads a v-nickle and a barber quarter. When I'm hunting my iron infested sites I look for any repeatable signal good or bad. Good targets close to iron will give a different response depending on the sweep direction but are repeatable. The meter will bounce around but at different sweep angles will float for a second or even quickly lock on to the good target during the sweep. Once again, watching that needle while sweeping at different angles and then sizing the target may well tell you there is more than one target under the coil. I mostly hunt with my disc set on nails. I never go above the nail setting and if the site is large with not much iron I will open up the disc all the way. If the site has extreme iron and the targets shallow I will sometimes use the TR disc mode. Remember that the meter is very accurate and honest and you just have learn what it's telling you.