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Question for Reg
- Thread starter Frank-S
- Start date
Frank,
Sorry but in my opinion, the TDI has the best discrimination capability, especially for a detector using a mono coil.
I haven't tried most PI's but I know of no other detector that has a really good disc feature.
Sorry you were not happy with the depth of the TDI. I find it works quite well.
Reg
Sorry but in my opinion, the TDI has the best discrimination capability, especially for a detector using a mono coil.
I haven't tried most PI's but I know of no other detector that has a really good disc feature.
Sorry you were not happy with the depth of the TDI. I find it works quite well.
Reg
Right now, no PI made by a major company is really good on very small gold. This includes the TDI series. To detect really small gold you need to sample at less than 10 usec which is difficult to do at full power. So, don't expect a PI to come close to detecting the size of gold one can detect when using a VLF designed for gold hunting.
The DF coil is designed to enhance the small gold signal, so it should have done a better job than a typical mono, but the main factor on detecting the small gold isn't the coil but is the delay before sample. This isn't something you can change on a TDI or SL made today. A program change on the Microcontroller would be required and this isn't something most people can do. Worse yet is the fact the present software is protected so it can't be copied. As such, one would have to start from scratch when trying to program a new chip. It is highly doubtful one would be able to do this.
Reg
The DF coil is designed to enhance the small gold signal, so it should have done a better job than a typical mono, but the main factor on detecting the small gold isn't the coil but is the delay before sample. This isn't something you can change on a TDI or SL made today. A program change on the Microcontroller would be required and this isn't something most people can do. Worse yet is the fact the present software is protected so it can't be copied. As such, one would have to start from scratch when trying to program a new chip. It is highly doubtful one would be able to do this.
Reg
Thanks Reg
I think that if you experment with a Mono type coil at10 usec with a TDI
you can get down to small gold. I got twice the dept with a expermantal coil with the
TDI than my X5 Troy VLF.Th12'' duel-field would not detecit.the experment coil is still glued
on my templet,not finushed,air test,I was useing .40 mh induction. as you know i am not
school trained in electronics.sometimes when i tinker i use the what if i do this.
Frank
I think that if you experment with a Mono type coil at10 usec with a TDI
you can get down to small gold. I got twice the dept with a expermantal coil with the
TDI than my X5 Troy VLF.Th12'' duel-field would not detecit.the experment coil is still glued
on my templet,not finushed,air test,I was useing .40 mh induction. as you know i am not
school trained in electronics.sometimes when i tinker i use the what if i do this.
Frank
Reg,thanks for all your poston PI bad target rejection.
I was reading your post on TDI forum. PI,s with conductivity switch,s and with out that
switch.you were sampleing the high conductor tone and low tone.to get rid of un wonted targets
you have good ears.I just passed 75 very hard to tell the differance.
a PI that can detect high and low tones in your hearing range can be designed to ID ferrous
and non-ferrous targets.
Each metal target has a atomic number White can send the high or low tone conductive signal
to a led light one for high tone, one for low tone,they might have to boost or amp; the signal.
One of your friends sent me a E-mail, he said that i ask to many un-nessary questions.
Some of these questions help other people.
Frank Serra.
I was reading your post on TDI forum. PI,s with conductivity switch,s and with out that
switch.you were sampleing the high conductor tone and low tone.to get rid of un wonted targets
you have good ears.I just passed 75 very hard to tell the differance.
a PI that can detect high and low tones in your hearing range can be designed to ID ferrous
and non-ferrous targets.
Each metal target has a atomic number White can send the high or low tone conductive signal
to a led light one for high tone, one for low tone,they might have to boost or amp; the signal.
One of your friends sent me a E-mail, he said that i ask to many un-nessary questions.
Some of these questions help other people.
Frank Serra.
Frank,
When you adjust the TDI to ignore iron, you will not have to try to tell whether the sound is a high or a low tone. Selecting the right conductivity mode will cause the other tone to be ignored, thus there is no tone from iron to hear.
In other words, if you want to hunt silver and copper US coins, you can adjust the ground balance (GB) to a lower number such as 4 or 5 while the delay is at 10 and most iron junk will now cause a high tone (low conductor). Select high conductor mode and all you will hear will be low tones (high conductor tone) and the iron junk signals will not be heard. So, even bad hearing works well on this detector if this selection is made.
Reg
When you adjust the TDI to ignore iron, you will not have to try to tell whether the sound is a high or a low tone. Selecting the right conductivity mode will cause the other tone to be ignored, thus there is no tone from iron to hear.
In other words, if you want to hunt silver and copper US coins, you can adjust the ground balance (GB) to a lower number such as 4 or 5 while the delay is at 10 and most iron junk will now cause a high tone (low conductor). Select high conductor mode and all you will hear will be low tones (high conductor tone) and the iron junk signals will not be heard. So, even bad hearing works well on this detector if this selection is made.
Reg
Frank,
All too often people expect to understand a PI immediately and that doesn't happen. It is not a VLF or act like a VLF. In fact, trying to use VLF techniques often result in disappointment as well as failures. As such too many people sell their TDI's because they are not happy with what they hear, rather than realize it won't sound like what they are accustomed to hearing.
To be honest, it takes weeks to months to fully or at least better understand a PI and its characteristics. A PI is simple not a VLF nor will it act like one. A PI has its own favorite sweep speed, tuning, and adjustments that are unique to it. No matter how hard you try you won't be able to train the PI to work like you want. Instead, you have to learn the PI's language and understand what it wants. This takes practice and more practice as well as experimenting. There are no shortcuts.
I have been working with PI's for well over 13 years and I am still learning new things. PI's do things that VLF's can't do and VLF's do things PI's can't do.
There are no easy answers when it comes to PI's. Some are easier than others but that is true with most things.
Reg
All too often people expect to understand a PI immediately and that doesn't happen. It is not a VLF or act like a VLF. In fact, trying to use VLF techniques often result in disappointment as well as failures. As such too many people sell their TDI's because they are not happy with what they hear, rather than realize it won't sound like what they are accustomed to hearing.
To be honest, it takes weeks to months to fully or at least better understand a PI and its characteristics. A PI is simple not a VLF nor will it act like one. A PI has its own favorite sweep speed, tuning, and adjustments that are unique to it. No matter how hard you try you won't be able to train the PI to work like you want. Instead, you have to learn the PI's language and understand what it wants. This takes practice and more practice as well as experimenting. There are no shortcuts.
I have been working with PI's for well over 13 years and I am still learning new things. PI's do things that VLF's can't do and VLF's do things PI's can't do.
There are no easy answers when it comes to PI's. Some are easier than others but that is true with most things.
Reg
Reg, you been working on PI,s 13 years, seems like 20 or 25.do you rember about 12
or 13 years ago you help me modify a CS6-PI. You ruined a fue 555 timers,at that time.
the old modifyed CS-6, was better on small gold and went deeper than TDI with 12 df coil.
i am not saying that the TDI is a bad detector, its very good on small gold and other targets
with the right coils. The TDI to some, is a people un- frendly detector,I agree like you said it takes
time to understand PIs,same goes for VLF detectors, they pay a lot of money for a detector expecting
to get good dept in bad ground,after seting GB lowering a fue numbers,you loose the good dept that
not good,I will stop there don like saying negative remarks.I do think that if White learns more about
metal atomic numbers.they will come up with a better ID circuit.
Frank-S
or 13 years ago you help me modify a CS6-PI. You ruined a fue 555 timers,at that time.
the old modifyed CS-6, was better on small gold and went deeper than TDI with 12 df coil.
i am not saying that the TDI is a bad detector, its very good on small gold and other targets
with the right coils. The TDI to some, is a people un- frendly detector,I agree like you said it takes
time to understand PIs,same goes for VLF detectors, they pay a lot of money for a detector expecting
to get good dept in bad ground,after seting GB lowering a fue numbers,you loose the good dept that
not good,I will stop there don like saying negative remarks.I do think that if White learns more about
metal atomic numbers.they will come up with a better ID circuit.
Frank-S
Frank,
I remember those days. I think my soldering iron was the culprit and was causing cmos chips to fail, so I bought a much better soldering station and cured the problem.
As for the old CS 6, yes, it was quite a detector that could go down to 8 usec. It was able to do this because of the low power design and the very short pulse width at 8 usec. The detection of very small gold was superior to the TDI, but depth on larger gold wasn't close to the more powerful unit. Also, the old CS 6 required a DD coil to obtain the short delay.
Now, with a few mods, the TDI may just come close to matching that old CS 6 on the small gold without giving up the depth on the larger stuff and do it using a mono coil. Yes, you might have to switch from one mod idea to the other, but that isn't something difficult to do.
I am working with an associate and he has modified a TDI SL following my recommendations and that detector is really quite sensitive to the small stuff. Next, it has to be tried in the field to see if there are any negative drawbacks. Unfortunately, weather and time have not allowed this testing to occur.
I am thinking the changes have to be optional but because there are three of them, I am not sure just how to approach this without adding a bunch of switches and I am trying to avoid that. So, more thought process is required.
Reg
I remember those days. I think my soldering iron was the culprit and was causing cmos chips to fail, so I bought a much better soldering station and cured the problem.
As for the old CS 6, yes, it was quite a detector that could go down to 8 usec. It was able to do this because of the low power design and the very short pulse width at 8 usec. The detection of very small gold was superior to the TDI, but depth on larger gold wasn't close to the more powerful unit. Also, the old CS 6 required a DD coil to obtain the short delay.
Now, with a few mods, the TDI may just come close to matching that old CS 6 on the small gold without giving up the depth on the larger stuff and do it using a mono coil. Yes, you might have to switch from one mod idea to the other, but that isn't something difficult to do.
I am working with an associate and he has modified a TDI SL following my recommendations and that detector is really quite sensitive to the small stuff. Next, it has to be tried in the field to see if there are any negative drawbacks. Unfortunately, weather and time have not allowed this testing to occur.
I am thinking the changes have to be optional but because there are three of them, I am not sure just how to approach this without adding a bunch of switches and I am trying to avoid that. So, more thought process is required.
Reg