Search the Community

Bit the bullet and did the sweep speed mod this morning. Made a huge difference in the acceptable SS. I ran the 1 grain gold bar past the 8 x 6 Sadie coil before doing the mod, and there was a relatively slow, specific sweep speed that gave the best signal. Too fast, and the signal completely disappeared. After the mod, the SS made almost no difference. Fast, slow, the signal was steady. No change in indicated depth in the air test. Threshold was still smooth. I'll post a video of the before/after tests later on. I changed the filter caps (C20, 21) from .47ufd, to ,22ufd. A friend in Florida, who is a civilian tech working for the Navy, was kind enough to send me a few matched pairs of the caps. Without his encouragement, and help, I probably never would have tackled this. Now I'm really glad I did. One tool I'm glad I had was my fly-tying magnifying light. My eyes don't focus like they did when I was young, and that magnification allowed me to see the soldered spots, to be sure I had done a thorough job. Jim

At one time I bookmarked or downloaded photo and text instructions on modifying the TDI/SPP to effectively turn it into a TDI/SL. I can't seem to find it. Anyone here know the link(s)?

Hello, I'm looking at penetration through schist / slate type bedrock and quartz vein medium mineralized on a 70 deg vert plane, so the end grain is detectable. Fair amount of fracturing from the use of explosives I believe leaving hairline to 1/32 cracking here and there and some larger along the rock wall with 60 or so years of CA. High Sierra weathering on it. . But I'm also looking at what the penetration depth would be for the same material in solid condition further in from the rock face. Anyone have any experience with these conditions? Target is a leafy up to .5 mm thick ribbons and crystalized pockets of gold in, umm, not sure what they're called but they look like flattened bubbles in the quartz coated with crystalized gold inside, the only visible "bubble" is .70" w x 1.7" or so deep, at least according to my fillet knife. Anyone?

I finally had time to do some testing on the SL, regarding the Ground balance. Here's the result: TDI SL GB TEST 350 Super Pulse coil. battery voltage at start of test = 16.0v Freq. max., Switch in "ALL", Gain MAX, Pulse delay MIN. 1979 US nickel Sweeping side-to-side. The test setup was having the detector vertical, with the coil on top of a 5 gallon bucket to minimize the ground effects. I taped a yardstick to the shaft. I did NOT use headphones, but did repeatedly sweep the nickel to try and get honest results. GB off 13" GB on: 2 14 1/2" 3 15 1/2" 4 15 1/2" 5 15 1/2" 6 14 1/2" 7 to 11 15 1/2" Freq. set to minimum GB off same GB on: 2 14 3/4" 3 14 1/2 4 14 1/2" 5 14 1/2" 6 thru 11 15" Switch to 12"DF coil GB off 17" GB on: 2-5 17" 6-11 16" 12DF with 1 grain gold bar GB off 3 1/4" GB on: 2-11 3 3/4" Both coils with 6 gram men's gold ring: Both coils detected this very close to the same as they did with the nickel. But, turning the GB on and off had very little effect on the depth. It's apparent to me that on some items, my detector is definitely better with the GB on, but set to 2, or minimum. But on larger gold, the GB has little effect. But what effect there is favors having the GB on, but set to minimum. There was only one instance where having the GB off was an improvement. I also tested my NF Sadie 8 x 6, and was surprised to see it was LESS sensitive to the 1 grain gold bar, than the 12"DF. The Sadie struggled to make 3". For me the best coil is the 12"DF, where it can be used. Where it's too cumbersome, I'll go to the Sadie. The Sadie was better than the 7 1/2"DF, and the MJ 5 x 9. I sorta wish I hadn't sold the 7 1/2"DF...I'd like to test it more. I also tested a 1" thick x 4" diameter hunk of aluminum, with a 1 1/4" hole through the center. Neither coil could detect it near as well as they did the nickel. Jim

I have never experienced this on any version of the TDI. The “ground balance off” mode should be the pure unfiltered signal. Engaging the ground balance engages a filter which reduces the air test results in a properly functioning TDI. The only reason the TDI has the ability to turn off the ground balance is to get this extra depth back, as has been highlighted in numerous online posts and videos. The manual says air test depth increases with the ground balance shut off. What you are saying simply makes no sense from a pure electronics standpoint and how the ground balance functions. If a TDI loses depth in air tests when the ground balance is shut off then in my opinion it is not working properly.

Has anyone else that’s using the supplied hip/chest mount pouch had issues with it splitting. My first one started within days and Whites sent me a replacement. First time out yesterday with the new one and it’s spliitting by the netting. Its not the design or the stitching, it’s the poor quality material used. They really should’ve used terylene or something stronger

Well I sat down and re-visited the 4 x 18650 batteries for the TDI Beach Hunter and managed a successful battery boost.....It's a snug fit but went in better than expected. Now someone probably has another version but here is my Ghetto version ! I needed to remove most of the White's battery holder to reduce the overall height otherwise the 18650 holder would sit on the floor of the White's holder. All that's really needed is the end part to make the electrical contact. The two outer batteries are quite secure inside the detector as they snug up against the battery compartment housing. 1. Cut down AA White's battery holder 2. Trimmed down 18650 battery holder 3. Removal of two small plastic tabs from the "roof" of the detector's battery compartment (easy and very neat) 4. Bit of hot glue to bring the two holders together but doesn't need to be super strong. 5. Soldering of 18650 leads to contacts on the White's battery holder And for the record.........the depth increase on my gold ring is a solid 1.5" to 2" over the standard 12v pack. Range has jumped from 14" to 16" with GB off and everything else at max.

I just purchased a TDI SL special edition. The unit came with the Miner John 8x12". It seems to do OK at the beach but leaves me wondering if another coil could do better. Not overly concerned about finding all the tiny bits. Also I find the walking pace when using the 12" mono, for complete coverage, is a challenge for me on the beach.

i ordered some 3.7v battery's my question is the Balance boards .. will this board work fine for me https://www.banggood.com/3Pcs-4S-30A-14_8V-Li-ion-Lithium-18650-Battery-BMS-Packs-PCB-Protection-Board-Balance-p-1191042.html?gmcCountry=US&currency=USD&createTmp=1&gclid=EAIaIQobChMIkP3vjbbD4AIVwdHACh0vjQInEAEYASABEgJZ_vD_BwE&cur_warehouse=CN also these are the batterys im getting 18650 battery Rechargeable High Drain Battery Voltage: 3.7V Storage Voltage: 3.7-3.9V Charging Cut-off Voltage: 4.2V Discharge Cut-off Voltage: 2.5V Capacity: 4000mAh Size: 18.0*65.0mm Weight: 50g Battery top: Flat top

Just thought I'd share the settings I use when I'm out hunting for gold in Australia. First setting: General gold detecting Set pulse delay to 10' Ground balance in ALL as best as you can' between the high and low tone. Flick into LOW and sweep the coil if your getting ground noises which I generally do just turn the GB up half a notch' so from 9 go to 9.5, if need be you can go a full notch without any huge loss on depth or sensitivity' this should now allow you to use full gain. Dig all high tone responces and listen carefully. Just note that running Low you will only find gold up to about 7-10grams If you still continue to get strange sounds that you can't ignore by advancing the GB setting, try the the GB process all over again but at 12 pulse delay. Second setting: large deep items When Using HIGH set pulse delay at 15-20' ground balance in ALL as best as possible' it will actually be a lot smoother because of the pulse delay setting' flick into HIGH, to remove any ground noise you now "reduce" the GB setting a little say from 6 go to 5. In High you will only detect targets the machine thinks are high conductive and any gold over about 7 grams, don't be concerned about loosing small gold you won't detect it anyway so in this setting run big coils and Use full Gain if possible. Dig all repeatable low tone responces if it turns out to be ground noise reduce the GB setting more up to about 2 notches from the original GB setting or do the GB process again but at a higher pulse delay. This setting will go deep expect big holes. Set the frequency correctly if you can't, use the machine away from EMI but generally the TDI doesn't suffer that bad. Iv found heaps of gold with the first setting so it does work well' but I'm yet to find a massive nugget with the second setting but the deep items I'm digging up shows one will be gold hopefully soon. Hope it helps.

I have had my TDI BH for 2 months now and was wondering if a mono coil would get more depth and less sensitivity to small targets namely lead bullets than the stock Dual Field. Where I hunt there are a lot and they sound good but fall through the holes in my scoop { 10 mm}

I have a TDI SL coming in today. I know most people want to detect for small gold. In my bad soil I want to detect silver coins that my CTX3030 can't reach. I'm a long way from the beach and probably long way from gold. That leaves coins and relics. I've heard that larger coils tend to ignore small trash which sounds good for a coin hunter. I know that if you raise the delay that this helps but with a loss of depth. A 12" dual field and 7.5" dual field are coming with the machine. What could I get that would be better suited for detecting coins?

I enjoy the DetectorComparison videos, he does a good job. Some not new but solid tips at the end of the video.

...is that you can chest or hip mount the control box using the included pouch. The BeachHunter TDI is already the lightest weight waterproof ground balancing pulse induction (GBPI) detector on the market at 5.2 lbs. It is also the only GBPI model that comes ready to hip or chest mount. If you chest or hip mount the control box all you are swinging is the rod and coil at about 2 lbs. Nice! Note that the coil on the BeachHunter TDI is hardwired to the control box. Use care not to bend and stress the connection point to the control box as it could lead to premature failure of the coil cable. More about White's BeachHunter TDI White's TDI BeachHunter with control box in hip mount / chest mount pouch

Tom, I have a brand new (3 spoke centre mount) 10" coil hand built by Eric Foster that I would like to have installed onto my TDI Beach Hunter. Is this something I could have White's do for me to maintain warranty? If so, could you PM me on cost and anything else I should consider. I find the 12" Dual Field just a bit too big for water hunting. Thanks for any help, Tony

Published on Jan 18, 2019 by White's Electronics, Inc. Can your P.I. detector discriminate iron? If you have a TDI the answer is yes it can!

Daniel Teague Published on Dec 5, 2018 Some of you guys were curious as to the tone differences between a Minelab GPX and Whites TDI. This is the GPX 4800 and TDI Beachhunter and a little bit of why I like the GPX better when it comes to relic and beach hunting.

So my brother who has been detecting for 20 years has only recovered 1 gold ring and that ended up in a museum in England. I promised him if he used the new White's TDI "DEEP" Beach Hunter the whole time on our hunt that he'd find more than 1 gold ring. Not only did he do that, but he also recovered the best ring of the trip, this monster Emerald, diamond and yellow gold beauty. Hats off to you Travis for not giving up on those deep signals. Folks, the TDI Beach Hunter is a Pulse Induction detector and it goes much deeper than standard machines. Plus it runs smoother than most in salt water and is simple to use...just turn it on, set the knobs and go. One of the cool features of the TDI beach Hunter is the Tone Identification system that allows you to decide if you want to dig the High Tone Only, which gives you a greater chance of gold and platinum rings, or the Low Tones which are usually most coins. This feature alone saves time as you will end up digging DEEP. One other thing to have, a good Deep Beach Scoop.