TESORO GOLDEN SABRE

[paku]

Hello All Why I Get This Error

[Davor]

By the look of your coil, it is not nearly as balanced as it should be. The overlap looks far too wide for a well balanced coil. As a result of poor balance, your preamp is saturated, so the subsequent circuitry picks the power supply fluctuations, and amplify them in a relaxation oscillation manner.

Fix your coil first. You must achieve below 100mV on preamp output to claim it balanced.

As I see your Tx coil is unshielded. Bad Idea. Foil shield drags a phase some 10° or so, but if both coils are shielded such drag is mutually compensated, and it makes sense to shield them both.

[paku]

Its Look Like This On Coil TX And RX Connection Or Rong

[eduardo1979]

[ATTACH]24540[/ATTACH]

Its Look Like This On Coil TX And RX Connection Or Rong

The coils are poorly void. If you do not have an oscilloscope, you must use an AC voltmeter and measure the voltage at the output of the preamplifier RX, (PIN7-LF353). The Voltage must be around 100mV. We also have to shield the two coils, that are well balanced. The space between the two axes of the coils should be at a distance of between 25-30mm or so. You certainly have a greater distance, so the cancellation is inadequate. You must read with great attention all over the forum post TGSL, and sure the detector is going to work first. You the first thing you have to do is learn to override the coils.

[eduardo1979]

Coil

So it has to be your coil more or less. Compare the distance of your coil axes parallel with mine.

[paku]

The coils are poorly void. If you do not have an oscilloscope, you must use an AC voltmeter and measure the voltage at the output of the preamplifier RX, (PIN7-LF353). The Voltage must be around 100mV. We also have to shield the two coils, that are well balanced. The space between the two axes of the coils should be at a distance of between 25-30mm or so. You certainly have a greater distance, so the cancellation is inadequate. You must read with great attention all over the forum post TGSL, and sure the detector is going to work first. You the first thing you have to do is learn to override the coils.

so on that my picture is that true connection or dd coil or not
the
Start TX End TX
Start RX End RX
or i can connect the coil booth

i have fixed shielded

[paku]

This Is My Coil So now on the board Tgsl Edu
witch one The Tx Start and Tx End
The RX Start And Rx End

[eduardo1979]

Here are all the details very well explained.
It is imperative that you read this.
http://www.geotech1.com/forums/showt...mplete-Details

[dfbowers]

Doesn't matter. Just hook it up and null coils. If u get a double beep reverse connections.

[paku]

ok thanks bro
now it work

[paku]

any one have finish coil and want sell it, i want buy cheap price if can
im to lazzy to make new the coil

[paku]

What is the best DD coil size

[eduardo1979]

I like the coil of 27 cm DD.

[dfbowers]

What is the best DD coil size

Depends. It's like using the right tool for the job. For lawns, a small concentric. For the most depth in mild ground, a 10" concentric. For the best coverage, a 10" DD. Personally my 9" DD is a good all around coil. Don't discount smaller coils! My 7.5" homebuilt concentric gives 90% of the depth that my largest gives in ground conditions.

[eduardo1979]

Depends. It's like using the right tool for the job. For lawns, a small concentric. For the most depth in mild ground, a 10" concentric. For the best coverage, a 10" DD. Personally my 9" DD is a good all around coil. Don't discount smaller coils! My 7.5" homebuilt concentric gives 90% of the depth that my largest gives in ground conditions.

That depends on the type of terrain. I, for example in my area, concentric coil does not help much, because of the high degree of mineralization of soil. I have done several tests with my IDX, and DD coil detects deeper than the concentric. There are sites with less mineralization, where concentric coil defends very well.