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To All TDI, SPP, SL owners (9 replies)

September 27, 2015, 12:19 am
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I am basically retiring from answering questions both on the forum or via emails about the TDI or any of the other Whit'es PI's. I recommend if you have questions you please send them to Steve Howard at Whites for answers.

Thanks for all the questions in the past.

Reg
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To Frank Serra (3 replies)

September 24, 2015, 8:21 am
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Frank,

White's has provided all the information needed including the address of where to send your SL. Don't expect them to send you an email.

I strongly suggest you send your SL to them with the following information:

1. Make a copy of your receipt of your purchase of the SL and include it in the box to prove you purchased the detector from one of their dealers.

2.. Make a detailed explanation of what you feel is wrong with the detector. Don't give your opinion that you feel the SL is supposed to be an upgrade for the TDI because it wasn't. It would have cost more if that was the case. Instead, state something like this detector has excessive noise and poor depth.

3. Request, they install the Australian mod. I feel this should be done so you can better hear the threshold variations when adjusting the frequency control. Improper setting of the frequency control an cause serious depth loss..

4. If you have never opened the control box, then tell them that.

5. If you have tampered with the coil or the coil connector, tell them that also.

6. Make sure to include your return address to assure the detector comes back.

7. Add insurance on the the detector in case of "loss".

8. Add tracking and signature required so you know it gets there.

Finally, remember you are dealing with a corporation that has provided your with the information you need to get your detector fixed and did so in writing on this forum, so failure on your part to not send it in because you feel you are entitled to a personal email will cause you to lose any official action, in my opinion. In a nutshell, send the damn detector to them. If you fail to send it in, then quit @#$%&. If you feel I am wrong, then feel free to consult a lawyer. I am guessing they will tell you to send it in also. I don't want to get any more involved than I am now in this mess.

Reg
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My SL test just for Frank Serra (10 replies)

September 28, 2015, 9:52 am
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Frank,

I need to qualify that my tests were run with a White's 12" plain mono coil and not a dual field. My brother has my dual field so it isn't available at this time. Also, I was using a RNB battery in the SL.

I don't think much of air tests especially if ran inside a house but I did one anyway and here are the results. On my SL, I get right at 12" with gain at max, delay at max and no headphones. I then ran the same test using my TDI and the results were a little better but not much. I managed about 13" on the TDI.

Keep in mind the tests were run inside and not in a remote area free from EMi. I did adjust the frequency control and could reduce the depth even though I wasn't hearing any noise to speak of.

I then ran a test on my 9" by 12" DOD coil and the depth was about 11"

Now, you remember doing tests years ago on a low powered PI where the air test on a nickel was greater. Well, those tests were done on coils with better shielding, and higher gain, so I would expect better results.

With the GB off, the gain of the SL could be kicked up considerably which obviously would increase the air test indications with some simple mods. However, those same mods won't work when the GB is turned on.

Based upon my actual tests and what you posted in the past, I suspect your SL is ok.

Fyi, the SL is an upgraded PI and not an improved sensitivity PI when compared to the TDI. It was designed to provide a lighter weight PI with non Li Ion batteries so shipping wouldn't be a problem. That is why the cost is lower for the SL than for a TDI Pro.

The early low powered PI's you worked with, were also running at a much higher frequency of 10Khz and higher. This gave a higher signal to noise ratio, a shorter delay and other features that helped. So, trying to compare those older PI's to your SL isn't practical.

Before any of you begin saying something is wrong with my PI's, well, I know better and no, I am not going out to try to find a spot where I might try buried depth tests. I have done this in the past and know I can get better depth in low noise areas.

Reg
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TDI Noise Reduction Mods contact info (no replies)

September 25, 2015, 8:54 am
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For all TDI or TDI Pro owners, there is a mod available that greatly reduces the warble and noise one hears in the threshold. Many have had it done and some has been written about it here in this forum. I decided to post more information as to who to contact about the mods and the pricing. The design is quite similar to that found in the TDI SL but has been simplified and improved for more reliable and smoother operation.

As many of you know, I don't do the mods, but there are now two people now available to do them. So, here is the contact information of the two guys.

First is Rick Schroeder located in Wyoming. Rick and I have known each other since early 2000 and worked on PI's together. You can contact him at cs6gold@gmail.com

The second is Paul Montgomery in Colorado. He and I worked together for over 30 years. His email is qxgator@msn.com

Email either of them for more info. Both can do the job right and the price is most likely the same from either.

If you have any problems contacting either of them, you can still contact me at rgsniff@comcast.net and I will forward you the same info as mentioned above and make sure they get your request.

Reg
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Tdi sl beach settings (9 replies)

September 28, 2015, 2:31 am
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Greetings everybody, I have a Tdi sl and use it primarily at the beaches here in Southern Ca. just wondering if some fellow beach users can chime in on settings, beach conditions, if you hunt mainly during the minus tides, do dry sand and how successful you have been. I have found this detector to run very stable in the black sand, and it does punch really deep. Any additional tips, or useful info is much appreciated.
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Noise Reduction Mod (1 reply)

September 27, 2015, 3:40 pm
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Had mine done quite some time ago and an still really happy with it. However I do have a question. Does the modified machine perform better with a Mono VS. a Duel Field coil?
I did notice some shifts ( not really falsing) at the end of each swing using the duel field.
John Frezza
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loose ball bearing ? (no replies)

October 2, 2015, 3:44 am
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This is my 2nd whites coil for the tdi in under a year. The 1st was a dual field coil that somehow sprung a leak. The 2nd is the 12" mono coil. I have used it maybe 4 times... now there is what sounds to be a little ball rolling around inside it... does anyone know if this will effect the coils ability or should I complain too whites again?
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I'm having trouble guys (12 replies)

October 10, 2015, 11:00 am
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The only thing I dig wile relic hunting is nails. Now the other day I was using my trusty G2 with the 15" Nel coil on it. I dug a bullet that was at least 11" deep. I didn't cross reference the machines. I should do that so I understand what's going on. I'm in no way going to give up on my TDI but its a little bit discouraging digging nothing but feris trash. What I'm going to do is go back to the spot where I dug the deep bullets & see what I missed. We shall see. I want to find my first civil war relic with this machine. Any information is appreciated. HH TIM
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Conductivity for lead (1 reply)

October 8, 2015, 10:20 pm
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Why does small lead (44 cal) bullets register as low conductors and bigger lead (54 cal) bullets register as high?
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TDI SL and ground balance (2 replies)

October 13, 2015, 6:32 pm
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I'm relatively new to the pulse induction machines. I've got a little better than basic understanding of it and I've got maybe 12 hours on it. I got the machine to see if it performed any better in my ground than my etrac and deus. Where I live around Birmingham Alabama, the dirt is permeated with iron ore and I've not found coin size targets at depths greater than 5-6 inches. And many times a merc at 5 inches is iffy at best.

That said, I did some experimenting today and want to ask if what I'm seeing is normal. I took the machine out today to a long forgotten home site where I've found six silvers with my vlf machines. The site has history all the way back to the late 1800s so there should be stuff older than what I'm finding. There are a fair amount of nails. Now I'm still not attuned enough to tell a nail just by ear so I took a silver dime out with me. I ground balanced the machine and when I found a target that I was sure was a nail I adjusted the ground balance down until I got rid of it. Then I'd run it over my silver dime on the surface and I'm getti maybe two or three inches on the dime at best. This is with a pulse setting of 10 and max gain.

I'm surprised at that loss of depth. The ground balances normal at about 7.5 to 8 and I have to go down to 2 to lose the nail. 4-5 and the nails come through loud and clear. I played with the pulse delay and really found no difference in the responses on either nail or coin.

Is this a reasonable loss of depth? I'm not giving up on this machine. It's finding nails at 8, 9, ...10 inches, so I know it will find stuff. I may just be asking it to do things it's not capable of in this dirt. I've got the 12 inch dual field coil, but have a 9 in miner John folded mono coil on the way. Relic hunting down south where the dirt is better I can see where this thing could outshine my vlf machines. Hopefully it performs well in plowed ground. Just another tool I want in my Arsenal.

So far the only way I can tell a nail is when I get an unusually low grunt, almost an overload, and then lift the coil. If I lift it two or three inches and it goes away it's always been a nail. A few times though it still gives tone but smooths out only to still be a nail, usually bent. I can also drop the gb down and make it go away, but given the depth loss I had on my surface test I'm not sure if that's just because of depth loss or if it's really filtering out the nail. Haven't found a coin yet to verify.....
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Well being persistent & patient has paid off these are my first civil war relics with my TDI (6 replies)

October 19, 2015, 10:42 am
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I did some cross referencing with my G2 to get my Bearings though. I did did some nails but it was aa 80/20 ratio. I can live with that. Thanks for looking. HH TIM
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Gold and Silver day (2 replies)

October 30, 2015, 2:54 pm
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Neither of these were very deep. It's the second time ever I've gotten gold and silver in the same day. A nice surprise! Tiny but still gold. Reg is also giving info about his newest TDI mods on the gold master forum, you guys should go check it out. I'm getting really excited about what he has to say...
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Used TDI SL price (5 replies)

November 1, 2015, 3:43 am
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I was wondering if anyone here could give me an opinion on a 2 year old TDI SL with 12" mono coil and 5x9 Razor back mono coil. The unit is in excellent condition (barely used). What's a fair price?
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wireless headphones (2 replies)

November 1, 2015, 5:02 pm
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Has anyone actually tried using wireless headphones with a TDI before? I suspect the signal might interfere with the PRO model but the SL model should still be silky smooth.
If you have tried wireless what is the best brand to be using for the SL?
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Spp (2 replies)

November 10, 2015, 6:58 am
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TDI SL (no replies)

November 10, 2015, 8:48 am
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Is there any differences between the first TDI SLs and the new ones? Thanx. DD
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DF coil qustion (2 replies)

November 11, 2015, 11:13 am
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Hi all
I'm wondering if it's possible to eliminate the inner 6" coil. I only hunt on the beaches and would like to use just the 12"mono part of the coil. My thinking is I'll get less noise from the mineralization.


Thank you! Ken
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TDI SL Mod (1 reply)

November 22, 2015, 2:20 am
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Are there any mods available for the TDI sl, other than batteries? Thanx
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Reg's mod on TDI Pro (7 replies)

November 28, 2015, 12:02 am
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Just received my TDI Pro back from being modded and WOW---the threshold is steady as possible at Full gain--Have 2 coils,12" DualField and 14" RazorBack--Both ground balanced perfectly. My ground is medium--GB is 68 on a Fisher F75--When I head out to AZ the GB may be different with the DualField according to some reports,however, in the meantime I will be enjoying using my TDI Pro WITHOUT the irritating warble on the threshold. Thanks Reg.
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TDI 'sl' battery options and am i going down the right route ?? (5 replies)

November 25, 2015, 8:38 am
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Would like some help/suggestions regarding the TDI 'sl' battery pack,i have a SL arriving this weekend,it has the stock 12'' and also comes with the 7.5'' DF coil as well,the one thing that slightly concerns me is the battery pack that comes with the detector,its brand new but from what i can gather it usually lasts about 6 hours but am i right in thinking it starts dropping off performance wise after say about 4 hours due to the battery running down ???

What i currently have in mind and what i am loooking at doing in the next week is that i all ready have a RNB2200 that i use in my DFX which is of course the same battery size as the SL,so my way of thinking is that initially when i take it out this weekend i will carry both the original battery pack and my 2200 battery so in theory i should be able to get a full days use out of this setup,what i am also looking at is the higher rated RNB batteries at 3100 as i have a option to buy 2 of these brand new at a reduced price,the logic tells me that these higher rated batteries should last not only longer but also keep a fuller charge for longer and this in turn would keep the performance of the 'SL' running at peak performance.

So is my way of logic on the right route or does it not work like that with the SL ??? i will also be buying a 14'' Mono coil for the SL to give me just a little extra depth when say on a potential roman/saxon hoard site of which i do have access on 2 of my permissions,was also wondering if the RNB or indeed the original battery pack has the power to run a larger than stock size coil.

Any help or suggestions would be most welcome,one thing i am still cannot fathom out as yet is a straight shaft for the SL machine,i am aware that it can be done but still not sure if Whites offer a shaft top section that can be used or if the only option is to go down the aftermarket route,not afraid too open the box up to graft the control box onto a straight shaft as i hate the horrible 'S' shaft that comes with the detector.

HH
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