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Found 140 results

  1. Read earlier threads, mostly about the coil. Does anyone have experience with this pulse detector and do they find it to be an excellent detector for prospecting the desert? Would love to hear opinions from users. Not a lot of reviews out there.
  2. I was looking for battery tray design for my Tdi SL which would allow 4 x 18650 batteries. As luck would have it on the local Prospecting Australia website XLOOX posted a simple mod for a Whites factory battery tray. I don't know how to post links so the full description is to be found in the Prospecting Australia site. Simple cut out the guts of the tray, leaving the original battery connectors with mods on one end and a copper connector on the other. I can fit Panasonic NCR18650B cells, without nipples but with protection. They just fit snuggly. The only issue is closing the lid, you need to cut a channel under the batteries into the base of the tray to allow for this. I'll cover this with a thin carbon fibre sheet and look at using a thinner sheet for the cover also. I will also add something to secure the batteries in position. Just waiting for the postman to deliver my carbon fibre sheet before finishing my own version of XLOOX's design. What I like most is that this is simple and cheap. Must confess I am aware of many different designs, since there have been no reports of smoking Tdi Sl machines I have finally decided to give it a go. All the best, Karelian
  3. Whites quoted on their website that the TDI beach hunter can also be used as a nuggett hunting detector in the gold fields. Was wondering if their was somebody who tried it and what their experience is and what the sensitivity on small gold is?
  4. The passing of a friend unfortunately has led to me taking ownership of a modified Tdi Pro. My machine is mounted on an Anderson shaft and is factory spec. My old mate had his machine modified to smooth out the threshold and to add some sensitivity. The specifics related to the modifications are not known by me, other than that they were conducted by 'Luke'..Oz Digger.. This happened some time ago. So the modified machine is probably not a keeper, I don't want two Tdi Pro machines.. The opportunity to do a comparison cannot and should not be ignored. My intention is to focus on small gold performance, the threshold smoothness, the ability to use gain, basic performance and handling characteristics under different circumstances. The machines will use the same fully charged battery pack, same coil, same targets, same test location and conditions on the same day etc. Trying to minimise external variations. I'll start with the usual useless air test. Later I'll follow up with in ground testing on the actual goldfields in mineralized soil. Test coils will be with a small coil and a large coil. Targets will be gold only. The 1 grain ingot, the half gram gold coin, a half sovereign gold coin. Some real small sub gram nuggets to see how small we can go.. There is a process involved so I'll take my time and do it right. Any specific questions or suggestions, speak now or forever hold you peace.. I'm only doing this once. Once it sold it will be too late to revisit.. All the best.
  5. Hi! after a year of snorkeling with TDI BH I concluded that I can clearly note the sensitivity goes down ones the voltage of my battery pack goes down. Other conclusion was that even at 12.6V the TDI BH is noisy underwater at maximum settings: it reacts to the waves. Thus at the moment I really prefer to have just a stabilized battery pack. For my experiment I took a couple of 21700 5aH Li-Ion cells and a dc-dc booster board. the plan is to get "one hunt" battery pack.
  6. I am curious what you guys think about the TDI SL. To start off - I KNOW it's not a GPZ! Price, weight, usability... it seems to have em covered as far as the under 1.5k pulse market goes. Maybe it's just under-marketed. Hope it's ok to ask here, I really appreciate what a resource this board has been for me in my first year at White's. I figure what better way to get an answer to a question than go straight to the folks who know best. So - let me know what you think about the ol' SL. Good. Bad. In-between. Open to suggestions.
  7. Was here with the with the 7.5 and Hi-Q coils , it leaves tomorrow,, absolutely no comparison to the big box TDI ,, and the HI-Q isn’t any better at air tests than the 7.5 coil,, Whites says it’s for relics as well as gold (HI-Q) maybe gold,, not relics having pursued relics for the past 35 years this combo isn’t it ,, I’ll stick with the big box and the standard spider coil,,, or use my other pulse the M/L GPX5000 ,, and as someone else had written ,, we shouldn’t have to buy or make higher voltage batteries to gain depth ,, don’t get me wrong I love my Whites detectors owning1, Big Box TDI ,, 2 , 6000 xl 1, Blue&Gray, 1,MX Sport ,, and 1 Eagle in Brand New mint condition too pretty to use ,, this package is advertised as a gold and relic detector / that HI - Q isn’t for relics of much depth before it taps out
  8. Just arrived in the mail, Nuggeteer 18 x 6 mono, mounts nicely on the Tdi pro using a Minelab lower rod. It is weighty at 1 kg but easily balances on the Tdi Pro, just don't have any metal in your shoes.. When the weather clears I'll go down to the beach and give it a good run. Useless air tests, test garden results and beach run results in the very near future.. karelian
  9. I've had this coil for quite some time, but it was packed away and forgotten. It was purchased for A$60 because I was intrigued. It is the anti-interference version. Measures 12 x 4 and uses the MInelab lower rod. Weight is decent, build quality is good. Performance in the field still remains a mystery as I've yet to use it. I gave it a quick air test just to see how it behaved on the Tdi Pro. This version has a hot spot in the centre of the coil which appears very sensitive to small targets at shallow depth. Seems to hit fairly well at shallow depths but doesn't have much punch for the deeper targets. Test garden results on coins would give real world depth on coins between a solid hit around 15cm or 6 inches and fading fast past 20cm or 8 inches. Useless air test with ground balance off, gain at max, in ALL, frequency in the middle, pulse delay at 10. 1 grain was 7cm .5 gram gold coin 16cm 1/2 Sovereign 23cm Us Quarter 23cm Aussie Penny 25cm Whites Buckle 33cm So in summary it hits hard on small and shallow targets, the centre of the coil is a hot spot for sure.. Fades fast as depth increases, the big Whites buckle just managed 13 inches. Since I managed max gain on the Tdi Pro in an EMI hot zone, the Anti-interference feature seems to work ok.. One of the things I like about the Tdi machines is the ability to plug in all sorts of coils, never know if you don't have a go.. My Tdi SL is highly resistance to EMI and the Pro less so but still very good. This coil could make more sense mounted on a Minelab around electric fences and mobile phone towers.. etc. All the best, Karelian
  10. Have a mine lab gpx 5000 and ordered a whites tdi sl for a backup unit a friend told me the gpx coils will work on the tdi?? But it’s not here yet to see if they will even plug in to the whites , so what’s the truth ??? Thanks
  11. Which do you think will hit deeper on wet sand? I'd prefer a TDIBH over a DF but I'm budget limited.
  12. Hello everyone, I have received many emails about the REG mods and responded to them. I finally spoke to Reg by phone and he is OK with me Posting the mods on this forum. He just wants me to send the info back to him to revise and make sure everything is OK. I am also glad he is still doing well. We also spoke about Whites and the situation at the company and how some of us are brand loyal and hope to see improvements. This way it will be easier as some times I delay email responses. Hope to post soon with Steve's permission of course. Gilbert
  13. Have been reading past treads from Steve H., Reg Snift, and others concerning modification that could be added to the TDI, TDI PRO, and TDI SL. One was a Li ion battery pack to up the voltage. I can do that. Another was to change a couple caps (c20 and c21) to .22 mf and change a couple op amps. Sounded like Reg would do some for a price. Then sounded like Reid Mann in Virginia would do them. Then the VP from Whites came on the forum asking for feedback. I forget his name but think he just retired , anyway, his final answer sounded like he would have this mod. incorporated into the new TDI SL future production. This was a year or two back. Now my question, Do you know if this mod. has been installed in the new TDI SL that fedex is supposed to deliver to me tomorrow? If not since I'm a retired electronic tech. I could install myself if Reg had given a little more information. If no one has or are willing to give out, do you know anyone that installs the mod. for a price? Thanks, Joe
  14. My first comment regarding discrimination with a ground balancing PI like the TDI and others is that people may be expecting things of the TDI it cannot deliver, and may be better off with a good discriminating VLF detector. If your priority is discrimination, no PI will discriminate like a VLF. There are two ways to tune the TDI. The first and preferred option is to tune the detector for the best depth. On low mineral beaches ground balance "off" usually give the best performance and you generally have to dig all targets. The sensitivity control and pulse delay are set to the desired level of quiet operation. You have to adjust those settings for your conditions. Forcing it by using settings other people use is fruitless. Salt conditions do vary as does mineralization and electrical interference, and the machines themselves vary by a small amount. I notice many people think lower settings will cause lost depth and therefore insist on higher settings, and then complain the machine is unstable. It simply is what it is. Adjust the machine for the conditions. If it does not perform to your satisfaction, use a different detector. You can't make a detector do what it does not want to do. As ground mineralization increases on some beaches, there is a point where using the ground balance “on” gives you more depth. Only with experiments can a person determine which setting gives more depth on your beach - ground balance “on” or ground balance “off”. If you use the ground balance, it BY ACCIDENT creates two audio classes of targets, those above the ground balance setting and those below the ground balance setting. These give either a low tone or a high tone. The resulting two classes of targets have only a little to do with what they are made of, but are based instead on the rate at which eddy currents decay in the target after the transmit pulse shuts off. Size has as much to do with the audio results as composition, just like on a VLF. The pulse delay sets the minimum level for this eddy current cut off or rejection. See Understanding the PI Metal Detector by Reg Sniff. With ground balance “on” you would normally, just like with ground balance “off”, adjust the sensitivity and pulse delay for whatever level produces quiet operation. I usually just put the coil underwater and pump it in the water, and first try lower sensitivity. If that does not remove noise I raise the pulse delay a little and try again. In general I am trying to keep the pulse delay as low as possible and sensitivity as high as possible. Eventually through trial and error I find a combination of sensitivity and pulse delay that eliminates audio results when pumping the coil in saltwater. The ground balance setting is determined by whatever setting gives no audio results when moving the coil up and down over the beach or the bottom when underwater. If basalt cobbles are present they may also need to be included in the ground balance tuning procedure. In extreme cases you may have to lower the sensitivity and pulse delay even more to get a proper quiet ground balance. Again, once you have tuned everything for best performance, you will have a pulse delay setting and ground balance setting that ACCIDENTALLY creates two classes of targets. The only way to see the result is to test various targets. In the U.S. our coins are much more conductive than many European coins and retain eddy currents better, and therefore generally give a low tone while most jewelry will give a high tone. Large ferrous will give a low tone and small ferrous a high tone. Very large rings may give a low tone as will most silver rings. In Europe and other places the tones may vary from what we see with U.S. coins. After experimenting to find out what items give what tones, you have a simple decision. You can dig one tone only, or you can dig the other tone only, or you can dig all targets. The results will be what you have determined by your experiments and if digging only one tone or the other loses items you do not want to lose then you must dig all items. If that is not acceptable, your should be using a VLF detector instead. Now, if you are willing to give up some depth, you can try to purposefully misadjust the ground balance control to move the tone division point. Doing so may switch some items from one tone to the other for a better result as regards discrimination. This however puts the detector out of proper ground balance. In mild ground you can do this easily but in highly mineralized ground the machine will now signal when moved over the beach or the bottom or past hot rocks. The depth is lost as you compensate for this by again reducing the sensitivity or increasing the pulse delay. Again it all is a matter of experimentation. If a desired item that is giving a "wrong" tone can be made to give the opposite tone by misadjusting the ground balance you may benefit from this in milder ground. It may be that the lost depth or audio side effects from being out of ground balance are not be worth it. You have to decide. To sum up, VLF detectors offer the best discrimination but may not get enough depth on mineralized beaches. A PI detector can get more depth, but any discrimination is an accidental byproduct of the ground balance system employed and will not separate targets like a VLF. In general you dig everything with a PI but in some cases you can derive benefits by digging some tones and not others, but you will without a doubt miss some class of good targets by doing this. That is just the way it is. The first ground balancing PI (GBPI) I used for beach detecting was the Garrett Infinium. Next was the TDI and then Garrett ATX. All three have similar tone results, but the TDI has the additional benefit of allowing you to manually set the tone break point via the ground balance setting. I have also used similar tonal separation using Minelab GBPI detectors. I go into more in-depth detail on another post referencing the new Fisher Impulse AQ where I reference all my notes on all these detectors so I am going to link there for further study. The Impulse is basically a refined version of what the TDI is doing with the ground balance control used first and foremost as a discrimination control and as with the TDI there will be performance trades depending on the settings employed. Understanding one will help you understand the other. This is a very complex subject for those wanting a simple VLF type discrimination system in a PI detector. They are however two different things, and you have to read and think quite a bit about how a PI detector actually works to get your head around all this. Or at a minimum do lots of experimenting and learn by observation. I have tried my best to explain things but there is no magic tuning or answers I can provide that will make these machines do what people seem to want them to do - act like a VLF. They are not. If they do not discriminate the way you want I have no settings that will make it happen other than what I have tried to explain already. This is kind of a summary and along with all the other posts is really about all I can offer or have to say on the subject. I hope it helps! Fisher Impulse AQ Discrimination Explanation Where Will The Holes Be In The Fisher Impulse System White's TDI SL Owners Manual White's TDI Beachhunter Owners Manual White's TDI Pro Owners Guide Steve's White's TDI Review
  15. Hi All, I'm new here. How does the TDI BeachHunter compare to the TDI SL? I'm in Vic, and am buying my first detector. I want a detector for the goldfields and occasionally the beach. TIA
  16. Whats the deal with ' hi-q'? What is that? Any different from regular tdi sl?
  17. My cleaning regime after an ocean detecting session is meticulous but I got a little careless when I got home. i always rinse the unit really well at the beach showers and always look for signs of water ingress immediately afterwards and everything checked out fine. When I get home, everything is submerged in a long plastic tub full of warm fresh water where it soaks for about 15 minutes. I also add some mild liquid soap to help get all the salt out of every knock and cranny. I normally add the soap to the bottom of the tub and then blast the water in to get it mixed up......and THEN I place the detector in. Well today, I got careless and placed the detector into the bottom of the tub first and then for some unknown reason, proceeded to fill the tub with heavy water pressure.........yep........the force of the water got past the orange gasket and forced itself into the detector body. Luckily I noticed it straight away and no damage was done at all. I did have to disassemble the whole unit and dried it all out completely. Not too much water got in as you can see in the third photo. The biggest hassle is getting the gasket back on and securing the 8 screws evenly otherwise the gasket can bulge out in a few places. Lesson learnt........go easy with the water pressure when using the snap on hose connector. I’ve only made this mistake once and didn’t get away with it. Anyhow, now you all get to see a disassembled TDIBH. Interestingly, the battery compartment is completely separate from the electronics top half. As far as a waterproofness weakness.....it is the orange gasket but only from high dynamic water pressure. Tony
  18. Something to watch out for. Extra desiccant pouches in the case my not be a bad idea, along with changing them regularly. http://www.treasurenet.com/forums/white-s/612770-tdi-beach-hunter-already-going-back-repairs.html
  19. How good would the TDI SL work for sniffing out coins around old foundations that have a lot of iron but low to moderate aluminum? I have been looking at various coil and detector options out there for the vlfs whether a new machine or for the machines I have and have a feeling they aren't going do do anything significant performance wise. Trouble is some of the old coins I suspect are in the areas are near foundations and where land was disturbed when the buildings were constructed. Conditions have heavy brush so a smaller coil is needed to sniff around and tons of iron that mask out even my little concentric. Smaller coils aren't going to hit the depths I want to get to 12"+ on small silver. Aluminum that is there is fairly shallow and not a big deal. I dig all the ring tabs as they have the same signal and vdi as flying eagles here. Can's I can identify with my eardrums 🙂
  20. All-new patented 8"×12″ Dual Field coil for improved depth and sensitivity. Bonus 7.5″ Dual Field concentric coil for a limited time! To hunt all day, you need a lightweight detector that still provides high performance. The TDI SL Metal Detector has pulse induction power that provides unbeatable depth and sensitivity and is designed specifically for prospecting and identifying relics. Special prospecting features make life easier, such full-control ground balance that filters out the iron mineralization of hot rocks, black sand, and other tough grounds. This compact detector weighs only 3.5 pounds with its waterproof 7.5" x 12” High-Q Search Coil, which offers deep detection depth. Other accessory coils are also available. The rechargeable NIMH battery lasts up to 6 hours, and a backup AA battery back will power all-day exploration. Owner's Manual (for TDI SL series, none specific to High-Q) White's TDI SL High-Q Camo metal detector White's TDI SL High Q Technical Specifications* Internet Price TDI SL High Q $1099 (available in both tan or camo colors) Technology Ground Balancing Pulse Induction (GBPI) Frequency 3250 - 3370 Pulses Per Second Autotune Mode(s) Slow Motion Ground Rejection Manual, one turn control Soil Adjust Ground Balance On or Off (two position switch) Discrimination Conductivity switch*, 10 - 25 Pulse Delay Volume Control No Threshold Control One turn control Tone Adjust No Audio Boost No Frequency Offset One turn control Pinpoint Mode No Audio Output Speaker, 1/4" headphone socket Hip Mount No Standard Coil(s) 7.5" x 12" High Q plus bonus 7.5" round Dual Field (Limited Time only) Optional Search Coils Over 100 accessory coils available by White's and others Battery Rechargeable NiMH & AA Operating Time Up to 6 hours Weight 3.5 pounds Additional Technology The TDI was designed specifically to be able to use Minelab SD/GP compatible coils. However, performance can vary and the pulse delay may have to be advanced to compensate for coil differences that result in overload readings. Notes *The TDI is unique in that it can suppress audio responses into two different classes. Targets have a high tone or low tone audio depending on how the target relates to the ground balance setting. In general high conductive targets give a low tone and low conductive targets a high tone. The TDI can be set to allow for one response or the other. See White's TDI Coin Settings for more details on this control. *Notes on Technical Specifications - Detailed notes about the specifications listed in this chart. White's TDI SL High-Q Tan metal detector White's 7.5" x 12" High-Q coil for TDI series White's 7.5" round Dual Field coil for TDI series
  21. I’ve recently had a few emails regarding my TDIBH so I thought I’d hammer out a response. I’m going to try and summarise with some dot points; I have close to 500 hours on this machine and run the 14.8v (nominal voltage) Lithium battery pack. Details in my earlier posts. The detector has found me quite a lot of big and deep gold. I don’t use it much in the water as conditions down here are generally quite rough. The 12” coil is physically too big in waves and white water. Also, digging 18” targets when you are being swept around by waves and swell is almost impossible even with 30 pounds of lead. The detector is now mainly used on the lower beach and low tide areas. I have had no issues running the 14.8v pack. I charge overnight and let the voltage settle down before using the next day as this avoids the off the charger voltage of 16.8v. My run time is about 6 hours before I swap out for a fresh pack. I have had no condensation issues within the detector. I do have a large silica gel pack in the battery compartment. The detector is quieter than other PI’s with the low delays when used in the shallow water and saturated hard pan. The SAT is very good in keeping things quiet even at low delay settings. Maybe it is the new Flux Capacitor that White’s now use 😉 I have several layers of yellow Plasti Dip on my coil to keep it well protected on the coarse shells and exposed reef areas. My ultimate power setting is minimum Delay and maximum Gain, threshold a fraction below audible with volume up high. Frequency is usually at the 12 o’clock position. I have only ever needed to change this once. My deepest ever finds have come from this machine. GB is always OFF unless I hit a rare patch of black sands. You need a BIG and STURDY scoop..............Tony
  22. Does anyone know any information on the new coil for the TDI SL and if the coil will be available separately? TDI SL is now ... TDI Hi-Q A new high performance coil design for added depth - in two options TAN Part Number: 800-0334-Hi-Q CAMO 800-0334-Camo MSRP: $1199.95 MAP: $1099.00
  23. I see so many people wanting to up the voltage. I know by doing so also improves sensitivity and overall performance. Maybe someone can tell me why didn’t White’s do the same. My thinking is less load on the electronics makes the detector last longer. At the same time the detector will have a better chance of making it through the warranty . Here’s another can of worms I’ve opened up. Chuck
  24. Just bought a used TDI Sl from eBay. When the ground balance is off the machine is stable and smooth. The second I turn it on the machine goes crazy. I got a good deal on it. Do I send it back or do I send it in to Whites for repairs? Thoughts?
  25. I was just wondering if anyone had used that coil? I have the SPP and I have the large DF plus others but inquiring mind wanted to know about it . At a price they asking it would be in my interest to ask here first. You may ask do I need it and that answer is no ! I’m like a kid in the candy store are a toy store. I Want ! Chuck
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