DEEPERS

[Alexismex]

Hello Geo and forum
Geo schematic is 100% ok
and for the discrim it is a simple over voltage detector when you have a big mass of iron red led goes up .... because it is very
very uncommon to have a very big mass of gold or silver ...smart design and i think much smart that the discrimination circuit type lottery of the pulstar
Alexis.

[aft_72005]

Hi to all
Discrimination at pi detectors is respective.
Respective to soil condition, detection deep, target size and…..............
Therefore most of them, discrimination correct around 50-70%
Best regards.

[Geo]

Hello Geo and forum
Geo schematic is 100% ok
and for the discrim it is a simple over voltage detector when you have a big mass of iron red led goes up .... because it is very
very uncommon to have a very big mass of gold or silver ...smart design and i think much smart that the discrimination circuit type lottery of the pulstar
Alexis.

Hi Alexismex.
Thanks for your reply. I am glad that schematic is OK because on winter i am interesting to give it a try. But as i see on simulator, if i will deconnect the Q7 then the U9 works again the same as astable. If so, why they have the Q7??
Regards

[Geo]

hi Geo i builder one pcb for deepers and work well in manual mode .

http://www.4shared.com/file/12487545.../SN850999.html

http://www.4shared.com/file/12487617.../SN851002.html

Hi Fabio.
Does it work ok at auto mode????
At manual mode does it stable????
Also what about the depth??

Regards

[WM6]

.. with 10 inch coil.... air test 85cm .... inside ground 70 cm.for a alu-coca-can ....much much better than pulstar.

Thank you Alexismex.

But who hunt for cola can?

Can you give us ground test for coins?

[Max]

Thank you Alexismex.

But who hunt for cola can?

Can you give us ground test for coins?

If goes deep with coke cans... it has a good sens, that will mean with smaller targets , like coins, it will go also deeper than others.

The thought is about linear if we consider just small coils like 10'' still it.

With larger coils you'll detect far great stuff, coke can, of course... but will lose grip on small things.

I have made many coils and PIs and know that if MD goes that good on coke cans can't do worse on coins too with that 10'' coil.

The problem of PIs are others... well known already, and discussed here...

E.g. if you're at beach... it's nice having such monsters... but , generally speaking, inland coinshooting is really impossible in most places with that things.

Kind regards,
Max

[Alexismex]

But who hunt for cola can???? always the same poor mind question....????
the comparative for the aluminum coke can it is because first aluminum response delay is very near to gold .
Second : cola can represent a very few grams of metal...
tercio: not many detector give a strong signal for a coke can at 65cm in the ground .... try with your detector!!!

Ps: coke can in Mexico are in alu , in Europe it is in iron ...

[Max]

But who hunt for cola can???? always the same poor mind question....????
the comparative for the aluminum coke can it is because first aluminum response delay is very near to gold .
Second : cola can represent a very few grams of metal...
tercio: not many detector give a strong signal for a coke can at 65cm in the ground .... try with your detector!!!

Ps: coke can in Mexico are in alu , in Europe it is in iron ...

no... they are aluminium also here!

I'm drinking 7up right now... it's good aluminium stuff... maybe , one time, it was some B52 fuselage....

Just BS products use iron/steel for beverage stuff.... unless needed (e.g. large containers).

Kind regards,
Max

[Geo]

But who hunt for cola can???? always the same poor mind question....????
the comparative for the aluminum coke can it is because first aluminum response delay is very near to gold .
Second : cola can represent a very few grams of metal...
tercio: not many detector give a strong signal for a coke can at 65cm in the ground .... try with your detector!!!

Ps: coke can in Mexico are in alu , in Europe it is in iron ...

Hahaha my XR71p with 20cm coil don't give any signal at 65 cm, not on the ground but on air
Alexismex you have right


Regards

[WM6]

tercio: not many detector give a strong signal for a coke can at 65cm in the ground .... try with your detector!!!
..

Which of mine detectors? I owned seven factory detectors (most VLFs) and all passed such test (Beer can 0,33L buried at 60 cm) even Chinese TS150. So nothing impressive. Still waiting on coin test.

[Alexismex]

Hello ,
I personally don´t believe you....did not want to go on polemic discussion but at 65cm in medium mineral ground with a "offset hole" ...you make a 65cm deep hole and in the bottom you make a transverse hole and here you put you coke can and test above ...

don´t believe because i make the "TRUE OFFSET TEST" with many vlf detector the lastest i check ...the Tejon here in the mineral ground of Mexico did not have any signal with Vlf detector ...
And did not speak of chinese Vlf not possible to adjust to the mineral ground
Alexis.

[ivconic]

Alexismex you'll be very suprised, you better beleive. Coke can or simillar Al can is giving extra strong signal at many detectors (IB's of course).
I can justify WM6's claims, simply cose i do have same experiences.
It is not about "beleive" or not. I guess it is about different make up of soils here in Europe and there at your place.
That's why i am oftenly pissed of - to many simillar Al garbage in soil here. I exhaust my self digging such very "good" signals and finally discover .... Al can or whatever simillar. And mostly at higher depths, 40,50,60cm and more. Especially in ploughts!
No matter how good discrimination is at some model, such Al garbage is almost impossible to discriminate. This is pretty often case - that's why i do remember it good!
Dont know about many other models, but i am 100% sure that White's M6 so as my Musketeer Colt (10"coil) and simillar can easilly detect Cola can at 60cm in soil. No problem at all.
But...IB's - not PI's. About PI's i am not sure. Maybe PI's on higher frequencies. Most probably.
Regards!

[ivconic]

Ah yes; turkish Atlantis Imperator II can easilly detect Al can at over the 80cm in soil, beleive or not. I tested it many times to show to my friends. No problem at all. Last year i had White's Spectrum - same results on Al cans and simillar garbage in soil. This year i tested also Minelab Explorer SE. With Excellerator DD 35x25cm coil Explorer can detect Cola can at over the 1m in soil with extra strong signal! Extra,extra strong signal!
So...it is not a problem at all to detect Al cans in soil at higher depths. It is problem to detect single (valueable) coin in simillar conditions!

[WM6]

But...IB's - not PI's. About PI's i am not sure. Maybe PI's on higher frequencies. Most probably.

Ivconic, I can testify about CS4PI which owned. CS4PI detect 0,33l beer can buried in 60cm hole (buried some years ago only for basic test purposes) even by moving about 20cm over surface. As you say, maybe it is "frequency" (changeable between 1000 to 4200 pulses /ps) that affect in deep, by relatively small coil, I don't know. But my homemade PI (coil 32cm) clearly detect this can too. CS4PI, unfortunately, is quite unstable (often chatter).

Alexismex I do not know much about Mexican soil, but I proven know that "can tests" and "coin tests" does not always provide comparable results (sometimes surprisingly different).

During tests all detectors are equipped with standard coils (most between 22 and 25 cm).

And yes, Chinese TS150 (otherwise sensitive to the wet grass) pass this test too. Here you are:

http://www.netzwerk-lan.com/produkt/282/Metall_Detector_fuer_den_Untergrund_Alltest_TS150. htm

[ivconic]

Yes it is for to be expected some nice PI to detect it also. No wonder.
Regards!

Zivio WM6!