TESORO GOLDEN SABRE

[Max]

Dear Max Ivco Qiaozhe and all
my TGSL can not reject iron elephant!
Please help!

An iron elephant ???

Ok...not big trouble...at least it's not the texas cactus...

Look here... if wanna know what's that... (better you don't, I warned you all!)

http://www.holybug.com/imgs/holybug/Texas-Cactus.jpg

Kind regards,
Max

[ivconic]

Dear Ivconic
i know what you mean actually i put digital meter on 200m
and it read 00.6 i can make it lower to zero even but zero is not very good

kind regrads

00.6 is excellent. Yet, must be something else very wrong? What?
Ok...than rebalance it to achieve 3-4mV, and let's see if there are any differences...
Are you sure you wired up coil-cable-connector-detector on proper way?
Search back the pages and look for proper wirements.
I am not able to help you on that, sorry!
Regards!

[metaldetector107]

TGSL

Dear Ivconic max qiaozhe simon

My TGSL work good some chatter from time to time but when trying to reject pulltab also it does reject Gold???? another thing it cannot reject rusty bottle tap some nuts only rejects Iron
frequency is 15.2Khz
detection depth for single 1,7cm silver coin around 20cm in disc mode
abit more in all metal..
can i use a single channel scope to connect RX to get right phase

please help

best regrads

[Max]

Dear Ivconic max qiaozhe simon

My TGSL work good some chatter from time to time but when trying to reject pulltab also it does reject Gold???? another thing it cannot reject rusty bottle tap some nuts only rejects Iron
frequency is 15.2Khz
detection depth for single 1,7cm silver coin around 20cm in disc mode
abit more in all metal..
can i use a single channel scope to connect RX to get right phase

please help

best regrads

Hi,
it's normal if you try to reject aluminium things you reject also gold: have similar phase angle...

My advice don't try aluminium rejection at all. Disc is useful just to ignore iron and a few other metals, unwanted... but not aluminium.

I know... you'll dig cigarette paper/foil, pulltabs, cans and all the rest but consider that aluminium trash you probably could live with.

Real pain is iron/steel....

Kind regards,
Max

[simonbaker]

Dear Ivconic max qiaozhe simon

My TGSL work good some chatter from time to time but when trying to reject pulltab also it does reject Gold???? another thing it cannot reject rusty bottle tap some nuts only rejects Iron
frequency is 15.2Khz
detection depth for single 1,7cm silver coin around 20cm in disc mode
abit more in all metal..
can i use a single channel scope to connect RX to get right phase

please help

best regrads

I have real Tesoro Compadre with similar performance - it also will detect rusty objects like bottle caps often, certain steel washers, etc.

Rejecting pulltabs does reject gold on most Tesoro detectors. One technique is to set disc lower to accept gold, then when get signal, turn higher to see if pulltab or gold. But never trust completely, dig often.

If you have external trigger on scope, you can use single channel scope to see phase of RX signal -- put trigger on TX oscillator signal.

However, as Ivconic says, nulling is best by testing with coin and making small adjustments near the minimum voltage.

Another way to get correct null phase is to first get minimum voltage (with scope or voltmeter), then measure voltage on capacitors C15 and C12. These voltages should be positive. If your null phase is wrong, they will be negative. Change the null slightly until those voltages positive.

Regards,

-SB

[metaldetector107]

TGSL

Dear friends
is there any metal detector can identify targets properly i kno there are many many ID metal detector but i want to hear from you.
by the way i have oredered minelab muskerte advantage pro from kellycodetectors.com so what is yor opinion???

kind regrads

[simonbaker]

Clutter test

I am interested in following test if anyone kind enough to do it:

1. Take TGSL with proven ability to air test euro at 30+ cm.

2. Put coil on table. Surround with some junk, like tools, home-made coils, steel parts cabinet. Not too close, just nearby.

3. Then air-test euro. Is depth any different with junk nearby???? What does it measure?

muchas gracias,

-SB

[ivconic]

Same. When junk is nearby it doesn't affect recovery speed much at TGSL.
But when junk is near coin (holding pliers with coin togather) than detection is worse, of course. Worse for 30-50% (15-25cm on coin) depends of junk mass and position related to coin. Best recovery speed i saw so far is at XP GoldMax Power (18kHz). TGSL is on second place, of course this is relative, i can talk only about models i tested so far.

[Max]

I am interested in following test if anyone kind enough to do it:

1. Take TGSL with proven ability to air test euro at 30+ cm.

2. Put coil on table. Surround with some junk, like tools, home-made coils, steel parts cabinet. Not too close, just nearby.

3. Then air-test euro. Is depth any different with junk nearby???? What does it measure?

muchas gracias,

-SB

Hi,
when stuff are close could be a problem... but just in very trashy sites you have such cross between e.g. coins and old rusty nails etc...

Civil war scenario... many fields are this way.

In that cases I suggest you try with Lobo w/concentric coil or other MD cause TGS/TGSL with DD is general purpose stuff... can't do anything good.

If things are apart and distant a few... is not big issue. Device works as good as without iron near. As explained.

It's common drawback of such designs have finite recovery... and thus missing stuff when iron near... but some are better than others.

If you consider also that TGS was designed for nugget hunting... you can figure out why cannot be compared to "trash" digesting machines...

Kind regards,
Max

[simonbaker]

Hi,
when stuff are close could be a problem... but just in very trashy sites you have such cross between e.g. coins and old rusty nails etc...

Civil war scenario... many fields are this way.

In that cases I suggest you try with Lobo w/concentric coil or other MD cause TGS/TGSL with DD is general purpose stuff... can't do anything good.

If things are apart and distant a few... is not big issue. Device works as good as without iron near. As explained.

It's common drawback of such designs have finite recovery... and thus missing stuff when iron near... but some are better than others.

If you consider also that TGS was designed for nugget hunting... you can figure out why cannot be compared to "trash" digesting machines...

Kind regards,
Max

Thanks all for answers.

I'm thinking about special case on workbench, not practical detecting in field -- very different.

On workbench, junk and coil both stationary, only target moves. In field, target and junk both move relative to coil.

I am wondering if stationary junk on workbench "deadens" or shifts phase response of coils to a moving target.

I mean really testing it with a homemade TGSL -- coil on table, move coin above it. Then add junk on table, again move coin above coil. Any difference in depth or discrimination??? I don't have a "great TGSL" (30+ cm depth) to test with.

This is helpful to know... is it possible to determine good coil on workbench, or must every coil be taken outside to test if good???

Regards,

-SB

[ivconic]

For simillar reason i put plastic table in my workshop. Huge plastic table...no crews no nails in it. That table is serving me to test coils and to balance also new coils. Table is 80cm high - enough to void steel from concrete in floor.
So... especially prepared conditions for dealing with coils.
Other thing... junk near coil and both static - doesn't make much sence to me! More real situation is junk nearby coin, both static and coil movable over them...

[metaldetector107]

20cm coil

Dear Ivco Max Qiawzhe all friends

please i want to build a samll DD coil for TGSL aroun 18 t0 22cm
because i have problem with coil housing so i have a monitor stand

so please help

best regrads

[Darko]

Dear Ivco Max Qiawzhe all friends

please i want to build a samll DD coil for TGSL aroun 18 t0 22cm
because i have problem with coil housing so i have a monitor stand

so please help

best regrads

Maybe this will help: http://www.geotech1.com/forums/showp...1&postcount=68

Regards,
Darko

[simonbaker]

For simillar reason i put plastic table in my workshop. Huge plastic table...no crews no nails in it. That table is serving me to test coils and to balance also new coils. Table is 80cm high - enough to void steel from concrete in floor.
So... especially prepared conditions for dealing with coils.
Other thing... junk near coil and both static - doesn't make much sence to me! More real situation is junk nearby coin, both static and coil movable over them...

Ok, you answered my question in a way. My purpose was: I wanted to prove how important it is to create such a special place to test coils, not question of junk when hunting.

I have no space, so I was hoping maybe nearby junk not so important when testing coils, but only test with real excellent TGSL would prove it true or false.

I guess you have decided it is important to make special area, but if you get a chance to test it by putting some junk near coil and waving coin, I would be interested.

Regards,

-SB

[ivconic]

I think i already done that many times. Maybe my intentions were not same as yours but i done that for other reasons. So what happened? Nothing. Static junk nearby static coil does not affect depths neither the discrimination. In a way coil&detector are "selftuned" to present situation and only dynamic changes are affecting those. It is almost the same thing as you put steel screw on coil enclosure instead plastic one - nothing bad will happen ! Coil will continue to work accurate. Ok...in most of cases phase will be shifted a bit but not significant. It is "habit" from the past - to use plastic bar extension and plastic screws on modern machines. I am practicing the very same when manufacturing my handmades....although i cant tell exactly why am i doing that? Most probably that i adopted the same "habit" looking at originals!
Cant claim for sure for all possible models, but at TGSL and Delta Pulse plastic bar extensions and plastic screws are not important. Doesnt make a difference. Try and see.
This is very funny especially at older nonmotions, where operater can manually tune detector to present situation. So...what the heck is so obligated to use plastic there?
I might be wrong. Would like to hear other opinions...
Cheers!