Another TDI-Pro .............. without problems.

[U.K. Brian]

Arizona, the trade are there to sell you things. Avoid if you can. The picture under my name is the three gold coins plus gold rings found with the TDI in the first fifty hours of detecting with it that paid for the detector itself and a better/lighter (Razorback) coil.

You don't have to use a threshold if you want but as Ivan says its really a must or do you want to waste a great deal of your time ? You could leave the battery out and it will run really quite !

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[TerryC]

Arizonajames. I have been following your posts for some time.You know what you're doing... no mistake. But, I am scratching my head. A post above says you found .1 gram gold at 2 to 3 inches with the TDI Pro and it sounded like you were pleased with that. I have been thinking about getting a TDI (or Tesoro Lobo Super Traq). If that is as good as a TDI Pro will do, I may stay with my GB2. The GB2 will sound off at 2 inches with just .04 gold. Please do some more testing on the amount of gold the TDI pro will hit on so I can further define my needs. Are you close to Stanton, AZ so that I may try out the Pro over some flakes I can bring? I am VERY interested in testing the Pro IN THE TRENCHES. I'll pop for lunch! Tnx. TTC

[TerryC]

TDI-SL threshold is a true threshold, done the same as the TDI & TDI-pro. The depth difference is due to the lower battery voltage.

Carl, AZjames says you are a Whites engineer. May I DRILL you on the TDI in up-coming weeks? I predict one is in my near future and I can use some answers FROM THE SOURCE! Do you remember the Fisher Impulse 8? I still own that relic.... but it WORKS in the salt! But it's getting old.... rusty. How does the TDI (I know it is not submersible) compare to the Impulse 8 or Excaliber on the wet salt beach? But my main interest is how it stacks with the Gold Bug 2, my main squeeze. Tnx, sir. TTC

[arizonaames]

Hi Terry,

I was headed out to your area when I injured my knee in a motorcycle accident last August and ended up at the VA in Gainsville, FL to get er done. I did enjoy my 2 month stay on the Alabama coast (the fishing in Weeks Bay was awesome). I used the TDI (standard) and the Pro on the beaches of St Augustine, Crescent Beach, and Flagler Beach in FL and used only the TDI-Pro on the beaches of Pensacola, and Gulf Shores, AL. They are great beach machines. The GB2 that you now own will find gold much smaller than what a PI machine will find but the PI machine will work better on mineralized ground or mineralized salt conditions that one finds on a salt water beach. The GB2 is an awesome machine to use to find a place to set up a drywasher.

The PI machines will hit deeper than a VLF but on bigger targets. I was able, not to find, but to air test a .01 gram picker with an air test using a 5x10 razorback mono coil with the TDI-Pro. The Pro is more sensitive to nickles and gold and will pick up a nickle deeper than a dime if coin shooting. The ideal match for detecting gold and setting up a drywasher that I saw other prospectors in nothern NV use was a ML GPX4000 and a GB2. The ML for nugget shooting and the GB2 to set up their drywashers. You can substitute the very expensive ML for the TDI Pro. It will not hit as deep as the ML GPX 4000 - 5000 series but for the extra few inches it will be half to a third of the price. The TDI machines can also be used for coin hunting and yes they do have discrimination and they can also be used as a beach detector. I hope that this information is helpful....jim

[TerryC]

Hi Terry,

I was headed out to your area when I injured my knee in a motorcycle accident last August and ended up at the VA in Gainsville, FL to get er done. I did enjoy my 2 month stay on the Alabama coast (the fishing in Weeks Bay was awesome). I used the TDI (standard) and the Pro on the beaches of St Augustine, Crescent Beach, and Flagler Beach in FL and used only the TDI-Pro on the beaches of Pensacola, and Gulf Shores, AL. They are great beach machines. The GB2 that you now own will find gold much smaller than what a PI machine will find but the PI machine will work better on mineralized ground or mineralized salt conditions that one finds on a salt water beach. The GB2 is an awesome machine to use to find a place to set up a drywasher.

The PI machines will hit deeper than a VLF but on bigger targets. I was able, not to find, but to air test a .01 gram picker with an air test using a 5x10 razorback mono coil with the TDI-Pro. The Pro is more sensitive to nickles and gold and will pick up a nickle deeper than a dime if coin shooting. The ideal match for detecting gold and setting up a drywasher that I saw other prospectors in nothern NV use was a ML GPX4000 and a GB2. The ML for nugget shooting and the GB2 to set up their drywashers. You can substitute the very expensive ML for the TDI Pro. It will not hit as deep as the ML GPX 4000 - 5000 series but for the extra few inches it will be half to a third of the price. The TDI machines can also be used for coin hunting and yes they do have discrimination and they can also be used as a beach detector. I hope that this information is helpful....jim

Outstanding post, AZJames! I will digest, regurgitate, then digest this info again. Tnx, my friend. TTC

[arizonaames]

An important fact, that is not mentioned enough is when using any detector, especially a PI detector that is impowered by increased power with a large battery pack, do not use shoes that contain any metal in eyelets or in the construction of the shoe or boot. You can also pick up noise from change in your pocket or a belt buckle. The metal detector coil radiates not only up and down but horizontally as well. This will effect an unstable threshold and for those that are not in the know will think that the detector is unstable. On the beach, I use wet suit booties. You can also buy boots or shoes that do not cantain any metal.

[ivanll]

Hi Terry,

I was headed out to your area when I injured my knee in a motorcycle accident last August and ended up at the VA in Gainsville, FL to get er done. I did enjoy my 2 month stay on the Alabama coast (the fishing in Weeks Bay was awesome). I used the TDI (standard) and the Pro on the beaches of St Augustine, Crescent Beach, and Flagler Beach in FL and used only the TDI-Pro on the beaches of Pensacola, and Gulf Shores, AL. They are great beach machines. The GB2 that you now own will find gold much smaller than what a PI machine will find but the PI machine will work better on mineralized ground or mineralized salt conditions that one finds on a salt water beach. The GB2 is an awesome machine to use to find a place to set up a drywasher.

The PI machines will hit deeper than a VLF but on bigger targets. I was able, not to find, but to air test a .01 gram picker with an air test using a 5x10 razorback mono coil with the TDI-Pro. The Pro is more sensitive to nickles and gold and will pick up a nickle deeper than a dime if coin shooting. The ideal match for detecting gold and setting up a drywasher that I saw other prospectors in nothern NV use was a ML GPX4000 and a GB2. The ML for nugget shooting and the GB2 to set up their drywashers. You can substitute the very expensive ML for the TDI Pro. It will not hit as deep as the ML GPX 4000 - 5000 series but for the extra few inches it will be half to a third of the price. The TDI machines can also be used for coin hunting and yes they do have discrimination and they can also be used as a beach detector. I hope that this information is helpful....jim

Never deny a man his dreams,............... but a .01 gram picker with a TDI any of the TDI's, might just have to stay a dream...........or it could be a misplaced (.) point.

Not to worry, a TDI-Pro do have cababilities and with frequent and proper use in the right places it will alert the user when the coil is over heavy metal.
Detecting small pickers is a thrill as it indicates the detector/coil combination is optimised and used correctly, especially when the ground is "Hot".




I find it strange that there are so few posts regarding the TDI's. ? ? ? Glad I got mine while they were available.

ivanll

[arizonaames]

I redid the air test on the wee picker and indeed it was smaller than a .1 gram picker. I did have the decimal point off and meant to state it was a .1 gram picker that tested 2 to 3 inches from a 5X10 razorback coil with the TDI Pro. Anything smaller one would have to use a GB2 or similar VLF detector. Even so, that was excellent for a TDI PI machine. I run the TDI Pro with no background hum and keep it silent as far as threshold is concerned. When coin hunting, I usually have the pulse delay set to about 14 to 15. The Pro is more sensitive to small gold and nickles than a standard TDI. The GPX MLs do find small gold deeper but that could be due to the increased battery power that they employ. More power would make the pulse signals go deeper for deeper detecting. I would assume that Whites could increase power also for deeper penatration but I would bet that for every gain there will be a loss to some other benefit. The TDI is not bothered by EMF as much as a ML and perhaps with the increased power there will be a problem with EMF.

[ivanll]

I'm not much for air tests, much prefer to see video's in actual ground tests so the effect of the ground is included.
This one 0.21 gram is from Hot ground not friendly to VLF detectors.
Every setting maxed out and with a threshold right on the border to allow the whisper of a ripple in threshold audio to be heard.
No threshold................ no little pickers in this ground, even with a PI unit.


ivanll