Standard Test Results

[Tinkerer]

Hi Tinkerer,

What size coil is it I will redo the tests with an 18" minelab mono except for the TDI as I do not have that here now.

Regards, Ian.

Hi Ian,

sorry I can not give you more information about the coil nor the circuit, because it belongs to a client.

I am interested to see your results with the 18" mono coil.

Ian and Allan have sent out several Titanium standard test samples. Where are all these test results?

I think it would be good if Doug would make a sticky thread for the standard test reports so it would be easier to add a new test report and easier to find the test reports of the past.

Tinkerer

[Prospector_Al]

Sorry Mick see above I have eddited it.

Regards, Ian.

Hi Ian,

I see that you know how to edit posts.  I can't for my life figure out how to do it.

I wrongly credited Mick with the Ti samples you sent me, but when I discovered the typo and wanted to correct it I couldn't do it.  Is there a time limit on corrections?

Allan

[Doug]

Sorry Mick see above I have eddited it.

Regards, Ian.

Hi Ian,

I see that you know how to edit posts.  I can't for my life figure out how to do it.

I wrongly credited Mick with the Ti samples you sent me, but when I discovered the typo and wanted to correct it I couldn't do it.  Is there a time limit on corrections?

Allan

Here are the current settings.
doug

[Prospector_Al]

Sorry Mick see above I have eddited it.

Regards, Ian.

Hi Ian,

I see that you know how to edit posts.  I can't for my life figure out how to do it.

I wrongly credited Mick with the Ti samples you sent me, but when I discovered the typo and wanted to correct it I couldn't do it.  Is there a time limit on corrections?

Allan

Here are the current settings.
doug

Mercy Bowcups!  I should have read the fine print--now I know...

When it's too late I'll just add a note with the correction.

Allan

[Prospector_Al]

Hi Guys,

Well I spent some time today while I was out bush and did the tests with all of my coils with different timings.

All of the tests were air tests with the coil on the ground and the target waved over the coil. At some stage I would like to repeat the tests with the targets in the ground to see the difference. The distance was recorded where there was a definite response not for a faint response.

Cheers Mick

Hi Mick,

I did some comparison between the different targets I have to determine if
high conductivity results in lower output.  My tests indicate quite the opposite.

The areas of the targets were calculated to eliminate the effect of the size
difference.  The "Standard Al Block" was used as the reference.

TARGET       AREA IN SQ.   SIGNAL IN V  NORMALIZED SIGNAL  AS FRACTION OF AL BLK SIG.

AL BLK       8.0                   2.2               2.2                          1.0         

TI 6AL4V     12.6                  2.8              2.0                         0.9

MICK'S TI    5.6                      0.9              1.4                         O.3

FE BLK        8.0                      0.5              0.5                         0.2

These results indicate that the Al Block and the Ti Alloy block yield about the same
output, despite the large difference in their conductivity.

Your Ti Block yields a lower than expected output, but that may be because it's
rather thin.

The Fe block yields a low output because the Ferrous and Non-Ferrous responses have
opposite polarity and only the difference between them is output.

These measurements were made with an 18" coil at 4.5" distance so the signal would be large enough with out demodulation.

It would be interesting to see what kind of a comparison you get between the Ti Alloy
target and the Standard Al Block,

Best Regards,

Allan

Correction: The Titanium sample actually came from Ian. 

I wonder if he has had time to make a comparison with the Standard Al block.  The question is:  Does a target with a short time constant respond better than a target with a long time constant to a standard detector?  If this should be true, then The Big Nuggets have been discriminated against and they are eagerly waiting their turn to be brought to light...

Allan

[Doug]

Hi Guys,

Well I spent some time today while I was out bush and did the tests with all of my coils with different timings.

All of the tests were air tests with the coil on the ground and the target waved over the coil. At some stage I would like to repeat the tests with the targets in the ground to see the difference. The distance was recorded where there was a definite response not for a faint response.

Cheers Mick

Hi Mick,

I did some comparison between the different targets I have to determine if
high conductivity results in lower output.  My tests indicate quite the opposite.

The areas of the targets were calculated to eliminate the effect of the size
difference.  The "Standard Al Block" was used as the reference.

TARGET       AREA IN SQ.   SIGNAL IN V  NORMALIZED SIGNAL  AS FRACTION OF AL BLK SIG.

AL BLK       8.0                   2.2               2.2                          1.0         

TI 6AL4V     12.6                  2.8              2.0                         0.9

MICK'S TI    5.6                      0.9              1.4                         O.3

FE BLK        8.0                      0.5              0.5                         0.2

These results indicate that the Al Block and the Ti Alloy block yield about the same
output, despite the large difference in their conductivity.

Your Ti Block yields a lower than expected output, but that may be because it's
rather thin.

The Fe block yields a low output because the Ferrous and Non-Ferrous responses have
opposite polarity and only the difference between them is output.

These measurements were made with an 18" coil at 4.5" distance so the signal would be large enough with out demodulation.

It would be interesting to see what kind of a comparison you get between the Ti Alloy
target and the Standard Al Block,

Best Regards,

Allan

Correction: The Titanium sample actually came from Ian. 

I wonder if he has had time to make a comparison with the Standard Al block.  The question is:  Does a target with a short time constant respond better than a target with a long time constant to a standard detector?  If this should be true, then The Big Nuggets have been discriminated against and they are eagerly waiting their turn to be brought to light...

Allan

Some would have you believe that nuggets with long time constants are a myth! Maybe its because their detectors detection depth falls away so badly on  long  TC targets with some timings!
Narrow sampling windows are not optimal for long TC targets and nor are detectors increasingly being "optimized" for fly dung nuggets!
doug

[IBGold]

Hi Al and all,

I still have not had time to do the 18" tests but here are the tests again including the big aluminium one and a smaller one for three standard Minelab coils the 8" Mono the 11" Mono and the 12" DD Have fun I am in the middle of Mario's frequency DDS module for the 2000 as well as a new coil and some other detector related projects but I will get around the the 18" Mono tests.

Al I learnt how and when to edit early on it would be my most used item Hi.

Regards, Ian.

[WM6]

Hi Al and all,

I still have not had time to do the 18" tests but here are the tests again including the big aluminium one and a smaller one for three standard Minelab coils the 8" Mono the 11" Mono and the 12" DD Have fun I am in the middle of Mario's frequency DDS module for the 2000 as well as a new coil and some other detector related projects but I will get around the the 18" Mono tests.

Al I learnt how and when to edit early on it would be my most used item Hi.

Regards, Ian.

Great work Ian, thank you.

As I understand it is about air test?

[IBGold]

Correct.