I have owned and used a White TDI for 18 months and have walked over more gold than I have found. White agree I cannot detect the gold nuggets being found with the GPX 5000. They state the TDI is designed to detect larger nuggets deeper. A few years back we spoke about ounces found, then that became grams, now it is bits found. The White TDI cannot detect small gold nuggets.
White TDI pro Oz series detector
- Thread starter swinger
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Hi swinger welcome to the forum.
Hope you enjoyed your stay.
What part of Australia are you from?
Thanks
Hope you enjoyed your stay.
What part of Australia are you from?
Thanks
G
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swinger said:
Oh yes it can.
WalnLiz
In remembrance, April 2024
Whites TDI is great on small nuggets (even better so than on big nuggets)....Learn how to use it properly and make sure you're actually on a recognized gold field. Check out some of the vids on the TDI on the WalnLiz You tube channel and you'll see just how small a piece of gold you can detect with them.
Do some tests yourself with some little subgram nuggets with the "Correct" settings and I'll guarantee you'll pick them all up. Let us know what settings you are using and maybe we can put you on the right track.
Welcome to the forum and hope you gain some valuable info from with its threads,
Wal.
Do some tests yourself with some little subgram nuggets with the "Correct" settings and I'll guarantee you'll pick them all up. Let us know what settings you are using and maybe we can put you on the right track.
Welcome to the forum and hope you gain some valuable info from with its threads,
Wal.
Hi WainLiz,
On the WA goldfields of Meekatharra. Nannine region. Photographed the settings on my White TDI pro Oz series, and forwarded to Goldsearch Australia, they and White have found no fault with the settings. In an air test with no Ground Balancing required the absolute best the unit with standard coil can detect is 1 gram.
Changing coils makes no difference. Tried the highly recommended Coiltek Goldstalker 6". No change. To increase gain further overdrives, and the tone oscillates and becomes impossible to ground balance. As per Whites advice, gain must be reduced in Hot ground to balance. Of course less gain less detectability.
The Gold we are recovering is .03gram and smaller, easy meat for the 5000. cannot be detected by my TDI. What the 5000 detects, I can go over with the TDI, and believe me we have tried every variation of the OZ series settings, and it is blind to these pin head size bits, which we then dig out, (very shallow).
White emailed as late as yesterday stating their detector cannot detect bits this small, that's why the 5000 costs $A4500 more than their unit.
If the Oz series can be modified to equal the sensitivity or get closer to the 5000 it would be very worthwhile. Big Bits are out there, but fewer and fewer every year, you can only recover them once.
On the WA goldfields of Meekatharra. Nannine region. Photographed the settings on my White TDI pro Oz series, and forwarded to Goldsearch Australia, they and White have found no fault with the settings. In an air test with no Ground Balancing required the absolute best the unit with standard coil can detect is 1 gram.
Changing coils makes no difference. Tried the highly recommended Coiltek Goldstalker 6". No change. To increase gain further overdrives, and the tone oscillates and becomes impossible to ground balance. As per Whites advice, gain must be reduced in Hot ground to balance. Of course less gain less detectability.
The Gold we are recovering is .03gram and smaller, easy meat for the 5000. cannot be detected by my TDI. What the 5000 detects, I can go over with the TDI, and believe me we have tried every variation of the OZ series settings, and it is blind to these pin head size bits, which we then dig out, (very shallow).
White emailed as late as yesterday stating their detector cannot detect bits this small, that's why the 5000 costs $A4500 more than their unit.
If the Oz series can be modified to equal the sensitivity or get closer to the 5000 it would be very worthwhile. Big Bits are out there, but fewer and fewer every year, you can only recover them once.
G
Guest
The TDI pro STD will pick up a ".1gram" with STD coil, the TDI pro can be modified and using the right coil will constantly hit a .04 -.05gram a .03g is going to push any Pi machine.
The 5000 won't pick up a .03 with the STD coil and struggle with even the sadie .03 gram is what the SDC was designed for and its the only PI machine that will do this out of the box' even the SDC will only pick a .03 up shallow.
The 6" coiltek will struggle on the TDI in hot ground usually GBing at max and be noisey as hell.
And if your TDI only just picks up a 1gram? Try another 1gram piece otherwise take it back the machine has a problem.
The 5000 won't pick up a .03 with the STD coil and struggle with even the sadie .03 gram is what the SDC was designed for and its the only PI machine that will do this out of the box' even the SDC will only pick a .03 up shallow.
The 6" coiltek will struggle on the TDI in hot ground usually GBing at max and be noisey as hell.
And if your TDI only just picks up a 1gram? Try another 1gram piece otherwise take it back the machine has a problem.
Hi Zuke_Lynzy,
What gain are you able to run your TDI, above 4.... 9'oclock position?
The GPX 5000 very easily detects .01 gram, attached pic of an .03 gram pulled a couple of days ago. The TDI cannot detect it.
Who is modifying the unit, how much, and what coil? Mine is out of warranty so not concerned about having it modified.
Have already returned my TDI and Coil once to be told , nothing is wrong with it.
Have been detecting since 1989 always with minelabs. But found they were getting to heavy for me after spinal surgery.
Love the light weight of the TDI, but know I cannot get below a 1gram sample, even bench testing.
What gain are you able to run your TDI, above 4.... 9'oclock position?
The GPX 5000 very easily detects .01 gram, attached pic of an .03 gram pulled a couple of days ago. The TDI cannot detect it.
Who is modifying the unit, how much, and what coil? Mine is out of warranty so not concerned about having it modified.
Have already returned my TDI and Coil once to be told , nothing is wrong with it.
Have been detecting since 1989 always with minelabs. But found they were getting to heavy for me after spinal surgery.
Love the light weight of the TDI, but know I cannot get below a 1gram sample, even bench testing.
Sorry to butt in, but is that a 0.03g (3 hundredths of a gram) or a 0.3g (3 tenths of a gram) nugget in the photo?
AU
AU
Looks like some tough ground to detect in mate and the problem with that sort of ground is that the coil is already a couple of inches off the ground to clear the rocks. Swinger that country is a tough ask for a minelab let alone a TDI Pro and especially the size of gold your chasing.
G
Guest
Bud' I think you have the decimal point in the wrong spot' that little nugget in the photo looks like a 0.3gram not 0.03 as 0.03 is only a tiny flake.
My TDI has the mods and can be ran in Low at full gain anywhere and without the warble in All 3/4 gain in most remote areas.
I think your TDI has issues.
My TDI has the mods and can be ran in Low at full gain anywhere and without the warble in All 3/4 gain in most remote areas.
I think your TDI has issues.
G
Guest
Zuke_Lynzy said:
Hey Luke,
Hope your well.
You can see the size of the Nugget going by the size of the character text on the TDI.
Hi Guys and Girls,
That's the smooth country. Happy to post a pic of the rough Banded Ironstone areas.
The GPX 5000 has pulled over 14 bits in the past few days, largest .08 gram, mostly from the rough stuff. In 9 days the 5000 is closing in on an ounce.
My White TDI- ZERO, swung over many of the same contacts made by the 5000. I Hear nothing, regardless of settings.
Frustrating. and that nugget shown is by gold my scales as .03 gram. And very easy for the 5000, currently getting bits even smaller.
This is also very hot country, Tenant Creek fractionally worse.
That's the smooth country. Happy to post a pic of the rough Banded Ironstone areas.
The GPX 5000 has pulled over 14 bits in the past few days, largest .08 gram, mostly from the rough stuff. In 9 days the 5000 is closing in on an ounce.
My White TDI- ZERO, swung over many of the same contacts made by the 5000. I Hear nothing, regardless of settings.
Frustrating. and that nugget shown is by gold my scales as .03 gram. And very easy for the 5000, currently getting bits even smaller.
This is also very hot country, Tenant Creek fractionally worse.
To everyone, I believe the nugget is 1/3 of one gram, although my scales indicate .o3 and I cannot relocate the decimal point.
Hope this clears the size of nugget issue, and 0.1gram is the lowest size detected todate with the 5000 indicated on my scales as 0.01g.
Sorry about my Gold Scales readout.
Hope this clears the size of nugget issue, and 0.1gram is the lowest size detected todate with the 5000 indicated on my scales as 0.01g.
Sorry about my Gold Scales readout.
G
Guest
I just bought a GPX 5000.
Swinger were you using the enhance setting?
After watching JP's DVD the 4500 and 5000 is impressive how it deals with these types of areas.
Swinger were you using the enhance setting?
After watching JP's DVD the 4500 and 5000 is impressive how it deals with these types of areas.
G
Guest
How about you forget anything you have ever been told about the TDI pro, Right.
Next time your out detecting turn ON and set gain a little under 1/2, pulse delay at 10, GB as best as possible and flick into LOW, turn the gain up as high as possible 3/4' then try detecting that 0.3gram nugget if you can't you defiantly have a issue with the machine.
The TDI pro with the STD 12" coil will really only pick up that .1gram close to the surface and if that .3gram was under one of those rocks "not a hope with 1/2 gain"and STD coil.
Next time your out detecting turn ON and set gain a little under 1/2, pulse delay at 10, GB as best as possible and flick into LOW, turn the gain up as high as possible 3/4' then try detecting that 0.3gram nugget if you can't you defiantly have a issue with the machine.
The TDI pro with the STD 12" coil will really only pick up that .1gram close to the surface and if that .3gram was under one of those rocks "not a hope with 1/2 gain"and STD coil.
Thanks Luke_Lynzy,
Will give it a go and post the result. I appreciate the advice, certainly different and I haven't used those settings. Using ALL all the time.
Will try that tomorrow, driven back to camp today by storms. Thanks Again
Re the 5000 settings in Hot country are as follows :- B/L 2 ---V12-----G----Fine - Sen smooth----Man T 171---MOT S....RX7---Aud N---Aud/tone 33--- Stab 3 to 1-------- Sig 10-------Target 15------ Response N---- Tracking Slow-----Iron Off
Good Hunting
Will give it a go and post the result. I appreciate the advice, certainly different and I haven't used those settings. Using ALL all the time.
Will try that tomorrow, driven back to camp today by storms. Thanks Again
Re the 5000 settings in Hot country are as follows :- B/L 2 ---V12-----G----Fine - Sen smooth----Man T 171---MOT S....RX7---Aud N---Aud/tone 33--- Stab 3 to 1-------- Sig 10-------Target 15------ Response N---- Tracking Slow-----Iron Off
Good Hunting
G
Guest
Have you got another coil for the TDI? And what coil is the 5000 running?
WalnLiz
In remembrance, April 2024
G'day Swinger,
Zuke is giving you some good advice there mate with settings. First of all either chuck that original coil away if chasing gold, or only use it when detecting on the beach for coins where a waterproof coil is handy. They are no good for gold. For the area you are working buy, borrow or steal a NF 8x6 Sadie coil, run the RX Gain as close to 10 as possible, Pulse delay on 10, Threshold just off audible to let you run the higher gain, Target conductivity on Low for smaller gold or All for larger, and frequency on central.
We pick up down to 0.1g with no problems and a 0.5g will scream at these settings. The Sadie will also get you right amongst those coarse rocks you're working.
Don't expect the TDI to beat a GPX5000, but it will get an extremely large amount of sub grammers in the right hands.
Cheers Wal.
Zuke is giving you some good advice there mate with settings. First of all either chuck that original coil away if chasing gold, or only use it when detecting on the beach for coins where a waterproof coil is handy. They are no good for gold.
For the area you are working buy, borrow or steal a NF 8x6 Sadie coil, run the RX Gain as close to 10 as possible, Pulse delay on 10, Threshold just off audible to let you run the higher gain, Target conductivity on Low for smaller gold or All for larger, and frequency on central. We pick up down to 0.1g with no problems and a 0.5g will scream at these settings. The Sadie will also get you right amongst those coarse rocks you're working.
Don't expect the TDI to beat a GPX5000, but it will get an extremely large amount of sub grammers in the right hands.
Cheers Wal.
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