New Metal Detector Book!

[Silvino]

Congratulations Carl and Qiaozhi!
The book is amazing!
It's a invaluable source of good information!
Also, I'm sure most people here will like the chapter 13!

Silvino.

[Qiaozhi]

Congratulations Carl and Qiaozhi!
The book is amazing!
It's a invaluable source of good information!
Also, I'm sure most people here will like the chapter 13!

Silvino.

Actually, I'm surprised more people here are not interested in Chapter 14.
All except Hung, that is ... as he's not allowed to have a copy, just in case he might learn something.

[J_Player]

Perhaps you should have waited for Geo's reply before jumping in with both feet.

Thanks Geo. I seem to remember Carl telling me that he was able to trigger the Mineoro FG80 with his garage door opener.

I remember reading several times in treasurenet forums where Carl and others were able to trigger Mineoro locators with garage door openers, amongst other electronic transmitting devices.

http://www.treasurenet.com/forums/geophysics/98039-mineoro-dc2007-questions.html#post1029526

http://www.treasurenet.com/forums/techniques/106216-gold-locator.html#post1122616

http://www.treasurenet.com/forums/mississippi/98785-no-gold-yet-mineoro.html#post1036219

Best Wishes,
J_P

[Sneshko]

Today I received my copy of "Inside The Metal Detector" by George & Carl.
From England to Serbia traveled 12 days. Eh! Post, post ...
For me as a beginner in electronics - the book is excellent.
However, professionals may find it interesting detail.
George and Carl did a great job. Congratulations!
Of course, I will first try to close The TOTem PD.
Qiaoshi & Carl thanks for this very interesting book!
Regards!
Sneshko

[Qiaozhi]

Today I received my copy of "Inside The Metal Detector" by George & Carl.
From England to Serbia traveled 12 days. Eh! Post, post ...
For me as a beginner in electronics - the book is excellent.
However, professionals may find it interesting detail.
George and Carl did a great job. Congratulations!
Of course, I will first try to close The TOTem PD.
Qiaoshi & Carl thanks for this very interesting book!
Regards!
Sneshko

I'm pleased it arrived safely.
Enjoy!

[daryo]

nice book

[Morgan]

Today I received my copy of "Inside The Metal Detector" by George & Carl.
From England to Serbia traveled 12 days. Eh! Post, post ...
For me as a beginner in electronics - the book is excellent.
However, professionals may find it interesting detail.
George and Carl did a great job. Congratulations!
Of course, I will first try to close The TOTem PD.
Qiaoshi & Carl thanks for this very interesting book!
Regards!
Sneshko

I saw the TOTeM PD project,seems good electric field locator 65 to 75 KHz, i´m surprized that someone said it can locate the 1,5V spark at 3 meters .
Maybe better than PDK ???
When i have time i go to build the TOTeM. i will make the field test ,see the results,and post here.

[Morgan]

I saw the TOTeM PD project,seems good electric field locator 65 to 75 KHz, i´m surprized that someone said it can locate the 1,5V spark at 3 meters .
Maybe better than PDK ???
When i have time i go to build the TOTeM. i will make the field test ,see the results,and post here.

The shape of the TOTem is realy like a indian TOTEM,but the important is the field test.

[Geo]

I saw the TOTeM PD project,seems good electric field locator 65 to 75 KHz, i´m surprized that someone said it can locate the 1,5V spark at 3 meters .
Maybe better than PDK ???
When i have time i go to build the TOTeM. i will make the field test ,see the results,and post here.

Hi Morgan.
From what i saw about the spark test i believe that it is important the distance who detects the battery spark but not nessesary. How importand but not nessesary??? very simple at some lrls needing the spark and at other not. Your opinion???

[Qiaozhi]

The shape of the TOTem is realy like a indian TOTEM,but the important is the field test.

Like the PDK, TOTeM can detect the spark from several meters away, and a TV (with a CRT) from 6 meters. It has both passive and active modes of detection, and can act as a metal detector pinpointer. It also rejects ferrous targets. There is an audio beeper (that can be switched off), LEDs for a visual indication of a target, and a meter to show the signal strength Basically, it's an experimental LRL platform that allows you to test the various modes used by other LRLs. The enclosure is somewhat taller than most LRLs, due to the unique balancing method used for the ferrite coil. This method makes it much easier to achieve a good balance point.

[hung]

Hi Morgan.
From what i saw about the spark test i believe that it is important the distance who detects the battery spark but not nessesary. How importand but not nessesary??? very simple at some lrls needing the spark and at other not. Your opinion???

I have already stated a few times that the distance of detection of a spark is not directly related to the distance of detection of gold when employing ionic/electric field detectors such as the several versions of PDs, Mineoros, etc.

Just because a particular device can detect a battery spark from 30 meters, does not mean that it will detect long time buried gold at 30 meters.
It means that the device detects a battery spark at 30 meters. Just that.

The FG90 detects a battery spark from 35 cm. But a tiny small long time buried gold sample from 3-5 meters. The PDC210 can detect the same 1.5 V battery spark from 1.8m. But cannot detect the same tiny gold sample from 3-5m.
It's a matter of correct frequency and some CRITICAL elements that are featured in the signal and that makes the relevance of the 'DNA' for gold.

This is how we say in Brazil... the 'cat's jump'.

[Geo]

I have already stated a few times that the distance of detection of a spark is not directly related to the distance of detection of gold when employing ionic/electric field detectors such as the several versions of PDs, Mineoros, etc.

Just because a particular device can detect a battery spark from 30 meters, does not mean that it will detect long time buried gold at 30 meters.
It means that the device detects a battery spark at 30 meters. Just that.

The FG90 detects a battery spark from 35 cm. But a tiny small long time buried gold sample from 3-5 meters. The PDC210 can detect the same 1.5 V battery spark from 1.8m. But cannot detect the same tiny gold sample from 3-5m.
It's a matter of correct frequency and some CRITICAL elements that are featured in the signal and that makes the relevance of the 'DNA' for gold.

This is how we say in Brazil... the 'cat's jump'.

Hi Hung.
I believe that you know that we don't locate every time the same """field""". The signal from long time buried objects is not always the same. So some times we need lrl that detects the sparks and other times we need other types lrls.
For example when trying to obtain the energy emitted from the gold when it releases electrons from the outer shell. This was the reason that Esteban says that it is better to construct a double in one detector.

Regards

[Geo]

Like the PDK, TOTeM can detect the spark from several meters away, and a TV (with a CRT) from 6 meters. It has both passive and active modes of detection, and can act as a metal detector pinpointer. It also rejects ferrous targets. There is an audio beeper (that can be switched off), LEDs for a visual indication of a target, and a meter to show the signal strength Basically, it's an experimental LRL platform that allows you to test the various modes used by other LRLs. The enclosure is somewhat taller than most LRLs, due to the unique balancing method used for the ferrite coil. This method makes it much easier to achieve a good balance point.

Hi Qiaozhi.
Why you did not use a rotated switch with only one potentiometer and without on-off switches???

Regards

[Qiaozhi]

Hi Qiaozhi.
Why you did not use a rotated switch with only one potentiometer and without on-off switches???

Regards

Because the potentiometers are 10-turn precision types, and these are not available with an on-off switch. But, even if they were, it would be extremely annoying to have to turn the control knob through several rotations to find the threshold every time you switched on the device. With the design as it is, the TOTeM can be switched off, and both the LONG RANGE and SHORT / MEDIUM RANGE thresholds can be left in their current positions.

There is some method in my madness.

[Qiaozhi]

The prototype TOTeM unit did not have any writing on the control panel, but the book shows the purpose of each control, as shown below: