Explorer SE VDI ?

[synthnut]

If you read what I wrote in the beginning ot this thread , you will see I made mention of this ID number change with noise channels ......Just a tid bit of info .....I read a thread on the Tesoro forum about a guy who realized that when you change the frequency switch on the Vaquero , that you are not only changing it for other machine's in the area, and interference , but you are also CHANGING ThE GrOUND BALANCE of the machine ..... So basically , if you're changing the noise channel , you're changing the ground balance , and also by doing so, you are changing the ID numbers as Charles indicates ...... Something else is the fact that Tesoro's are known to go deeper when you ground balance the machine , and then turn the ground balance knob counter clockwise 1/4 of a turn ( negative ground balance ) ...... Interesting too how close clad coins are in relationship to Silver with their makeup to send off very similar if not exact CO and FER numbers ....Jim

 

[synthnut]

Here's the youtube vid I was talking about ....

https://www.youtube.com/watch?v=bhTtkGCisfQ

 

[BigTony]

thanks for the video, too bad the volume was low.

 

[Charles (Upstate NY)]

If you read what I wrote in the beginning ot this thread , you will see I made mention of this ID number change with noise channels ......Just a tid bit of info .....I read a thread on the Tesoro forum about a guy who realized that when you change the frequency switch on the Vaquero , that you are not only changing it for other machine's in the area, and interference , but you are also CHANGING ThE GrOUND BALANCE of the machine ..... So basically , if you're changing the noise channel , you're changing the ground balance , and also by doing so, you are changing the ID numbers as Charles indicates ...... Something else is the fact that Tesoro's are known to go deeper when you ground balance the machine , and then turn the ground balance knob counter clockwise 1/4 of a turn ( negative ground balance ) ...... Interesting too how close clad coins are in relationship to Silver with their makeup to send off very similar if not exact CO and FER numbers ....Jim

For those who may be interested, if you connect an Explorer to an oscilloscope and observe the transmit signal while performing a noise cancel, you can watch the transmit signal changing. Its a pattern of 2 primary frequencies that repeat, one low one high. You see several shorter (high frequency) pulses followed by a few low frequency pulses. It looks something like this _-_-_-_-_-___-----___-----___ and repeats. When you perform a noise cancel this pattern basically just jogs slightly on the scope, no doubt using a different set of 2 primary frequencies.

 

[synthnut]

Hi Charles ,

I never used an oscilloscope a day in my life !!..... but there it is, the frequencies do change ...... I'm surprised that none of the companies that have channel or frequency change switches or programs never make mention of ground balancing again after changing the frequency or the channel ....Its done automatically on the Minelab but not on other brands of detectors ....It would be interesting to set up an experiment to see which noise channel on the Explorer would go deeper on targets !...even in an air test .....Soil conditions play a part in depth , and I'd be willing to bet that noise channels do to !!....

 

[Charles (Upstate NY)]

Hi Charles ,

I never used an oscilloscope a day in my life !!..... but there it is, the frequencies do change ...... I'm surprised that none of the companies that have channel or frequency change switches or programs never make mention of ground balancing again after changing the frequency or the channel ....Its done automatically on the Minelab but not on other brands of detectors ....It would be interesting to set up an experiment to see which noise channel on the Explorer would go deeper on targets !...even in an air test .....Soil conditions play a part in depth , and I'd be willing to bet that noise channels do to !!....

I was thinking the same thing last night, setting up a fixture to test depth. But here's the thing, its almost meaningless in an air test. Depth is effected by soil, Explorer use soil to help get depth, and then there is the halo effect which does not exist in an air test. An air test might be interesting, but a far better test would be to find a crappy signal in the field that's breaking up, then cycle through the noise channels manually to see if it improves on one/some channels. That would be the ideal test imo. Where's Tim, hey Tim get on this buddy and report back!

 

[BigTony]

That is a terrific point and it would be site specific. Get a deep target and try the different channels.

The old timers said low channel for silver and higher for gold but that is all they said, no specifics.

 

[tiftaaft]

This is fascinating stuff, I am just catching up with this thread and my head is spinning just a little bit LOL.

Charles that's some significant research you did there and I need to get my head around that a little bit more. And yes I'm going to get out and check wild targets On the fringe of detection and run through the different noise channels to see you what kind of difference it makes to the ID and maybe even the quality of the tone. The summer has turned the ground into rock here in my area, Charles as you know, but there are a few places that I can still find reasonably dig-able ground and hopefully a few targets that I can test out.

As soon as I have some data and findings, I will report back for sure. Tim.

 

[Charles (Upstate NY)]

This is fascinating stuff, I am just catching up with this thread and my head is spinning just a little bit LOL.

Charles that's some significant research you did there and I need to get my head around that a little bit more. And yes I'm going to get out and check wild targets On the fringe of detection and run through the different noise channels to see you what kind of difference it makes to the ID and maybe even the quality of the tone. The summer has turned the ground into rock here in my area, Charles as you know, but there are a few places that I can still find reasonably dig-able ground and hopefully a few targets that I can test out.

As soon as I have some data and findings, I will report back for sure. Tim.

Yep I was digging targets Sunday...with the pointy end of a rock hammer

 

[synthnut]

I can hit everything in my test garden ....Perhaps someone has a test garden with items that they can't hit ? ...... BTW ....I have quite a few different machines , so I read threads on a lot of forums about a lot of different detectors ....A guy posted about ground balancing his AT Pro , and then deducted 20 from the actual true ground balance number ..... He was able to hit targets that he was not able to hit earlier with a normal/accurate ground balance ..... So now we have this working for the AT Pro and the Tesoro's ..... negative ground balance was key to hitting deeper targets ..... Don't look for accurate numbers on any of the DEEP targets ...It won't happen ...and sometimes even the tone changes as you get deeper and deeper ......

Charles ,
I agree that the air test is not optimum, but it's a starting point until we find someone that has known deep targets in the ground ...... not to mention mineralized and non mineralized soil plays a significant roll also .....Jim

 

[Charles (Upstate NY)]

I can hit everything in my test garden

Raise your coil off the ground until you can't lay one or two wood 2x6 over the coins and slide your coil across them for a consistent test distance. Explorers HATE a air/soil/target sandwich under the coil depth drops off fast with an air gap. They air test at crazy depth, WOT coil aimed at the horizon, wave a man's gold ring under it its insane the depth it will get in the air. But aim the coil at the ground, put soil in the mix depth drops off significantly on the same gold ring. Depending on the soil of course.

 

[tiftaaft]

I have a test garden with targets ranging from 3 inches to 11 inches. The deeper targets are Out Of Reach depending on the setting so that is a good place for me to start, however the garden is only about six or eight months old so it hasn't completely gained the halo effect from a few seasons of being buried. Beyond that , my intent is to find Targets in the wild, and test with various machines and various settings before digging. The only way to know for sure is to dig the target ultimately, so it will be a hit and miss I'm sure. Usually, I am surprised by good targets rather than knowing that they are there so this will be an interesting test.
And of course all of that is subjective to the ground conditions that I have in my test Garden in my area which are different than every other person on this forum, except Charles and a few others that are strugglung with the PNW soil conditions as well. L