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Waterproof White's TDI
- Thread starter steve herschbach
- Start date
steve herschbach
New member
Not sure what type thread but it is coarse.
If you already drilled the ears on your coil no need for a Minelab lower rod. Hurt your coil resale value but saved the price of the lower rod.
Steve Herschbach
If you already drilled the ears on your coil no need for a Minelab lower rod. Hurt your coil resale value but saved the price of the lower rod.
Steve Herschbach
Jim,
Does elderhood follow geezerhood because I think I have entered geezergood. Geezerhood is when you find that the golden in golden years really is rust. I hate to think what you find out when entering elderhood.
Sorry to hear you are not using your TDI much. The weather here is too cold to nugget hunt so other forms of hunting are taking its place.
During the idle time I am working on some ideas I have had for quite some time. Different coils are part of that design. In fact, I just tested a newly built test coil outside. The coil still needs to be fully potted but I wanted to see if what I am hoping will work as it does on the bench. So far everything looks good.
Reg
Does elderhood follow geezerhood because I think I have entered geezergood. Geezerhood is when you find that the golden in golden years really is rust. I hate to think what you find out when entering elderhood.
Sorry to hear you are not using your TDI much. The weather here is too cold to nugget hunt so other forms of hunting are taking its place.
During the idle time I am working on some ideas I have had for quite some time. Different coils are part of that design. In fact, I just tested a newly built test coil outside. The coil still needs to be fully potted but I wanted to see if what I am hoping will work as it does on the bench. So far everything looks good.
Reg
The TDi plastic bolt size is 2 inches long x 3/8 diameter x 16 threads per inch. Looks like I need a 2.5 inch long black plastic bolt from McmasterCarr and they do have a 3 inch available, cost is around 15 bucks with shipping for a package of 25 . Does anybody else need any?
-Tom, ps, Reg, I am in aches and pains senioritis land ,have been for some years now. I get one ache fixed up and another takes its place !! I wonder how Steve keeps detecting in rugged places without hurting afterwards? Heck, being over 55 now, I can get my AARP card... I also discovered a short piece of duct tape can stop extremely painful plantar fasciitis pains in my feet and heels and the front part of my foot and comes off easily.Vapor Rub helps for foot arch pain as does walking barefoot on a cold floor.
-Tom, ps, Reg, I am in aches and pains senioritis land ,have been for some years now. I get one ache fixed up and another takes its place !! I wonder how Steve keeps detecting in rugged places without hurting afterwards? Heck, being over 55 now, I can get my AARP card... I also discovered a short piece of duct tape can stop extremely painful plantar fasciitis pains in my feet and heels and the front part of my foot and comes off easily.Vapor Rub helps for foot arch pain as does walking barefoot on a cold floor.
I waited until I got a chance to try my different coil design on a modified GS 5 set up to be a TDI and all I can say is WOW, what a difference. Besides a coil change, I also made some technical changes to the detector that included increasing the gain significantly. Even with the increased gain, this detector is so quiet it is scary at normal sensitivity setting of mid position on the pot and still more than reasonably quiet at max sensitivity. In fact at max sensitivity the detector is quieter than a TDI set at less than mid gain setting. The GB is now much touchier but still very manageable.
The detector sounds more like one of the more expensive PI's now with all the extra sounds, though. What is impressive is the depth increase.
I have this detector set up to operate at 8 usec but I can't use that short of a delay because of all the gain increase. However, that doesn't matter because the signal from my 2 grain test nugget is so much stronger on the modified detector that the shorter delay isn't something I will need.
In simple terms, these mods make this detector a whole new machine that is a pleasure to use. At least, my initial testing indicates that and I am trying it in town with all the local noise.
Reg
The detector sounds more like one of the more expensive PI's now with all the extra sounds, though. What is impressive is the depth increase.
I have this detector set up to operate at 8 usec but I can't use that short of a delay because of all the gain increase. However, that doesn't matter because the signal from my 2 grain test nugget is so much stronger on the modified detector that the shorter delay isn't something I will need.
In simple terms, these mods make this detector a whole new machine that is a pleasure to use. At least, my initial testing indicates that and I am trying it in town with all the local noise.
Reg
Even better pricing and selection over at Fastenal online catalog:
3/8 x 16 White Nylon hex nuts, SKU # 76052, 16 cents each
3/8 x 16 White Nylon wingnuts, SKU # 0184671, 31 cents each
3/8 x 16 x 2.5 inch long ,White Nylon Hex Head Cap screws, SKU # 76124, 48 cents each
Look up your local Fastenal store, no shipping charges if you can wait for them to get it in, usually next day.
-Tom V.
3/8 x 16 White Nylon hex nuts, SKU # 76052, 16 cents each
3/8 x 16 White Nylon wingnuts, SKU # 0184671, 31 cents each
3/8 x 16 x 2.5 inch long ,White Nylon Hex Head Cap screws, SKU # 76124, 48 cents each
Look up your local Fastenal store, no shipping charges if you can wait for them to get it in, usually next day.
-Tom V.
Reg said:
Hi Reg,
How do I get these mods? Or is it only for the select few with through-hole TDI's? I am borderline about to jump ship for a GPX as they get the small gold deep, gold forums in Australia are awash with gold that the TDI just doesn't respond to
This little lot, 7 pieces was for 0.52g, the smallest piece is 0.02g, less than a third of a grain. Found with GPX5000 and a12x7 mono coil. I own a TDI and I have a 1 grain piece that was found using a GPX and even with a 8x6 mono on max gain, 10us, GEB 8. Threshold 'like a mosquito' and tapping the 1 grain on the coil gets zero response.
Unless I can find a way to magically make the TDI start finding 1/3rd grain pieces then its getting passed on!
Ben
Hi Ben,
I am not expecting to ever get the TDI to find sub grain nuggets with any consistency. I do expect improvements in both depth and size once I am done. However, right now, I am working on noise reduction and the best methods to accomplish this and I am far from being confident enough to post anything. I can get sub grain signals now but to do so has an effect on the ground balance since I am riding up the decay curve. Someone who knows what is going on would understand but to publish something like that would cause a riot with many people. So, I am taking a conservative approach and trying to find the best compromise.
Also, when all said and done, I will most likely be altering the software but I don't want to tackle that for some time. I need to get much of the hardware mods done and out of the way first.
Trying to mod a surface mount board is a royal pain so I am trying to do as much as I can on one of the original TDI's. Ultimately the conversion will be made but that will be a while since timing changes will have to be made in software. On the original TDI's altering the minimum delay is a twist of an internal pot.
So, to shorten this post and respond to your question, it will be a while before anything substantial will be posted. By a while I mean months not days or weeks. Personally, I can use some of the items now, but they are no where close to being someting most people could or would use.
Reg
I am not expecting to ever get the TDI to find sub grain nuggets with any consistency. I do expect improvements in both depth and size once I am done. However, right now, I am working on noise reduction and the best methods to accomplish this and I am far from being confident enough to post anything. I can get sub grain signals now but to do so has an effect on the ground balance since I am riding up the decay curve. Someone who knows what is going on would understand but to publish something like that would cause a riot with many people. So, I am taking a conservative approach and trying to find the best compromise.
Also, when all said and done, I will most likely be altering the software but I don't want to tackle that for some time. I need to get much of the hardware mods done and out of the way first.
Trying to mod a surface mount board is a royal pain so I am trying to do as much as I can on one of the original TDI's. Ultimately the conversion will be made but that will be a while since timing changes will have to be made in software. On the original TDI's altering the minimum delay is a twist of an internal pot.
So, to shorten this post and respond to your question, it will be a while before anything substantial will be posted. By a while I mean months not days or weeks. Personally, I can use some of the items now, but they are no where close to being someting most people could or would use.
Reg
Why would you want to find them tiny sub grain pieces anyway? I figger 480 grains per ounce/ 2 for 1/2 grain nuggets and gold at 1600 an ounce, them pieces are worth maybe $1.50, you will need thousands of them to justify the purchase of a Minelab GP detector, not to mention a strong back and knees for digging and etc.In my opinion, its not worth it?
Multi grain size pieces and up are worth digging at 5+ bucks a pop.
I'd love to see Regs final outcome with his tinkering and see if he would upgrade my TDi then?
The only Minelab in my future might be their new Pinpointer? I cannot afford/justify multi thousand dollar metal detectors with retirement coming up in 10 years, plus all these aches and pains I seem to have at 56 years old. Gotta think conservatively nowadays.
-Tom V.
Multi grain size pieces and up are worth digging at 5+ bucks a pop.
I'd love to see Regs final outcome with his tinkering and see if he would upgrade my TDi then?
The only Minelab in my future might be their new Pinpointer? I cannot afford/justify multi thousand dollar metal detectors with retirement coming up in 10 years, plus all these aches and pains I seem to have at 56 years old. Gotta think conservatively nowadays.
-Tom V.
steve herschbach
New member
When your buddy is finding gold and you are not, suddenly sub grain seems ok. A Minelab will find ALL sizes of gold better, so it is not just sub-grain. That incredibly weak signal can be a tiny nugget or a very large nugget down deep.
Steve Herschbach
Steve Herschbach
steve herschbach
New member
Quote from Carl Moreland of White's today on another forum:
"I need to squash these rumors of a "waterproof TDI," no such thing is in development. What I'm working on (and it's my personal project) is an all-new PI design that discriminates. The basics are working, but it's still further out than I'd like. Sorry, no dates. New waterproof case is ready, though."
All new PI design that discriminates? I am sure that will get a lot of attention. But I will point out that most of the PI detectors on the market feature some form of discrimination, so I would not read too much into that. At least a new waterproof case is in the wings.
Steve Herschbach
"I need to squash these rumors of a "waterproof TDI," no such thing is in development. What I'm working on (and it's my personal project) is an all-new PI design that discriminates. The basics are working, but it's still further out than I'd like. Sorry, no dates. New waterproof case is ready, though."
All new PI design that discriminates? I am sure that will get a lot of attention. But I will point out that most of the PI detectors on the market feature some form of discrimination, so I would not read too much into that. At least a new waterproof case is in the wings.
Steve Herschbach