My tgsl only 10cm deep

[Tekeweke]

Hi all I read in another post that tgsl reaches 30cm and 10cm I reached coils may be problems in electronics hobbyists as I am strictly follow the steps in the construction of this I can measure some tension with my tester and I need an oscilloscope to find the fault.
coils constructed as mentioned 0.25mm enamelled wire and 107 turns and 98 one another.
Greetings to all and thanks

PS: In the attachment is a picture of my coil

[habitbraker]

Firstly, your shields ar touching each other. Use some tape to isolate them.
Then your cable looks wrong - use shielded one.

You need to provide more info: frequency, null voltage, waveforms would be ideal.

[Tekeweke]

tgsl depth

Well you say that isolates the shield between coils but also the two must be grounded. and condolences to the cables if I have the tab shielded cable with nothing else so I started to try but did not think it affected both the depth but it would have unwanted noise
good construction will continue with more refined and see what happens many garcias.
Greetings

[simonbaker]

Hi all I read in another post that tgsl reaches 30cm and 10cm I reached coils may be problems in electronics hobbyists as I am strictly follow the steps in the construction of this I can measure some tension with my tester and I need an oscilloscope to find the fault.
coils constructed as mentioned 0.25mm enamelled wire and 107 turns and 98 one another.
Greetings to all and thanks

PS: In the attachment is a picture of my coil

It would be good to read this thread: http://www.geotech1.com/forums/showt...roubleshooting

and also add your questions to that thread.

At least your detector is working a little, that is good!

We have found that EMI noise and vibrational noise with coils that are not "fixed" (glued in a case) can cause poor depth. So to test, you must find an area that is away from electrical wires, etc. Maybe down in a basement.

Also, you must get a good null with your coils to start with. In addition, the coils must be held down very solidly away from any vibrations.

Then get an oscilloscope if you want to really understand and tune your MD.

Regards,

-SB

[Tekeweke]

only 10cm deep

Simon will do a consultation to review all the coils descuvierto I can complete with 0.40mm wire and not with 0.25 this may be the cause that has little depth?
another question do you mean the null value not to have tone down due to metal if that's near the null value is correct

[simonbaker]

Simon will do a consultation to review all the coils descuvierto I can complete with 0.40mm wire and not with 0.25 this may be the cause that has little depth?
another question do you mean the null value not to have tone down due to metal if that's near the null value is correct

.40mm wire is too thick and will probably cause difficulties -- I don't recommend it to solve this problem. I think .25mm can get good results if everything is built correctly.

I don't understand your question about the null. I was just saying that you must "null" your coils using the normal procedure, and then somehow fix the coils solidly so they cannot vibrate.

Regards,

-SB

[Tekeweke]

coil

ok in those days I will be building new coils with .25 mm and will I see the if I get results with more depth
II will be commenting further on the outcome, thank you very much simon
a big greeting from Argentina
and sorry for the English and the translator is not as efficient as it seems

[simonbaker]

ok in those days I will be building new coils with .25 mm and will I see the if I get results with more depth
II will be commenting further on the outcome, thank you very much simon
a big greeting from Argentina
and sorry for the English and the translator is not as efficient as it seems

Ok, good luck.

Also: if you write in both English and your native language, people can try different translators to help understand what you are writing.

Regards,

-SB

[Tekeweke]

and built the exact coil recommendations but most detected large objects at a distance of 15cm and only 5-7 cm coins that I can check for proper operation
DISCR mode and does not work that I do not much want to have more depth

[bernte_one]

hello tekeweke

are there any news of your coils construction? Have you found the solution.
I got only 20 cm for coins, disc works.

[Orbit]

tgsl work on board a small Chinese who assembled them Barbies ,and we can not draw a 10cm

[bernte_one]

banging head on my table

if i head more time i would do a precious coil - i should take the time to do it more exactly first time (before i build the first one) i thought that cant be so hard (i love pi coils they are so easy)
to get the specs is not the problem but to prepare the coils so that they are good that is heavy i bind them and i glue the i do isulation tape on it maybe it will be work better if i make a shield on them and link it all correct to connection wire and pcb
20cm for unshielded coil at first try on table is not the worst or?- but not enough for that work

[habitbraker]

Tell more - Inductances of coils, your tx frequency, how you ballanced the coils, how you connected it to PCB, do you have scope, what is you test object and other info

On bench it doest make big difference if coil is shielded or not. Maby little worse due to increased min quiscent null signal with shields added...

[simonbaker]

banging head on my table

if i head more time i would do a precious coil - i should take the time to do it more exactly first time (before i build the first one) i thought that cant be so hard (i love pi coils they are so easy)
to get the specs is not the problem but to prepare the coils so that they are good that is heavy i bind them and i glue the i do isulation tape on it maybe it will be work better if i make a shield on them and link it all correct to connection wire and pcb
20cm for unshielded coil at first try on table is not the worst or?- but not enough for that work

If you have a lot of EMI noise in the area, 20 cm may be expected even with good coil. You have to test in some place far from EMI to be sure (not always so easy...)

-SB