TESORO GOLDEN SABRE

[ivconic]

When coil is balanced to have residual voltage....let's say 1mV. Closing up same screw to distance when it will usually be on coil enclosure will affect residual voltage just to some 0.0x mV or even 0.xxmV - not significant.
Than closing up metal bar (instead plastic one) to same distance as it should be in final assembly, also will rise up residual voltage to some minor values.
At the end it will be so minor change in residual voltage that it is not important at all. But than we have to worry about phase shift too. Phase will be affected, of course. But also not significant. GEB trimmer at TGSL allows that range of correction to "distorted" phase again. So...
Point is that screw (static relative to coil) and metal bar (also static realative to coil) are not presenting more significant influence on phase and residual voltage, especially on second one.
Further, coils can be balanced in manner to anticipate those minor distortions in future. I will point again on splendid Payne's article reffered to this subject.

[ivconic]

Looking at new digital machines like White's serie and simillars, those are for real pretty "open" - operater can adjust those in whatever manner. Ground balance, air balance, manual presets in all those menus. So it is really funny to insist on plastic screws and plastic bar extensions at them. Whatever the unwanted (static) distortion is present arround the coil - operater can compensate it easilly with such "open" machine. No problem at all.
That's why i said it is "habit" from the past.

[Max]

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

Hi,
what's that ??? Fried chicken stuff and potato sticks ???

Everytime I see your posts I became hungry...

But you have to post also beverage... not complete!

About coil... I made... if remember well got good results with 120turns for both tx and rx... but you may need wind some turn more at rx... check carefully about phase is important for disc stuff to work.

Kind regards,
Max

[metaldetector107]

Coil

Dear Max
please i need a data for a DD coil about 18 or 20 cm cuz i am trying to use monitor stand as a coil housing.
so please

kind regards

[Max]

Dear Max
please i need a data for a DD coil about 18 or 20 cm cuz i am trying to use monitor stand as a coil housing.
so please

kind regards

My recipe was for 22cm DD coil... but I think you can try with smaller diameter and same numbers...

Try first match tx frequency... then focus on rx and phase.

Kind regards,
Max

[simonbaker]

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!

Ok, you answered me well. So I have no excuse if coil no good on my workbench -- taking outside will not magically make it better. A few objects around should not make radical difference in testing coil. Of course I'll try to keep objects as far as possible. My table is card table which has metal frame and legs.

I have wondered about metal screws and parts in coil mounting (Heathkit coil used metal screws I saw in one posting!), so certain amount of superstition as you say. I'm sure I'll continue to avoid such metal out of "habit" too.

Regards,

-SB

[WM6]

I have wondered about metal screws and parts in coil mounting (Heathkit coil used metal screws I saw in one posting!), so certain amount of superstition as you say. I'm sure I'll continue to avoid such metal out of "habit" too.

-SB

I tested to put metal out of center of coil and connect it to coil shielding. As ivconic say there are no visible effect on coil sensitivity.

[simonbaker]

I tested to put metal out of center of coil and connect it to coil shielding. As ivconic say there are no visible effect on coil sensitivity.

That is useful to know, thank you for doing test. I was not thinking about connecting metal junk to shield, but that is another case to think about.

Regards,

-SB

[metaldetector107]

RX tank

Hi friend
can i use a free square wave oscillator for LC tank matching?
best regrads

[WM6]

Hi friend
can i use a free square wave oscillator for LC tank matching?
best regrads

LC tank matching? You mean coil tunning? If so:

Sure you ca use reliable and accurate square wave oscillator on TX site to coil tunning, although the use of original TX module is more preferable.

[metaldetector107]

LC tank

Dear friend
i have made TGSL's TX oscilator only for LC tank
it will be very kind of you to give me some pictured example for how
to tune RX..

kind regrads

[peroon]

Dear metaldetector107,
are you really that stupid and idiot or you are just doing that purposely, for some reason?
Why are you asking so many idiotic questions?
Why are you purposely poluting this forum? (you already have everything very good explained here on these 154 pages - only total idiot and very spoiled man can constantly repeat same old questions again and again, dont ask! READ FORUM!)
Why are you trying to make fools of us here?
Why are you misusing administrators patience and democracy here?
Why dont you desapear from here for good?
Why are you so worthless and annoying?

Worse regards to you and go somewhere else!

[peroon]

People, friends, folks,MEMBERS! Rise up your voices! Let's push administrator to delete this idiotic fool from here! Are you so uninterested for future of this forum? Show your will to preserve this forum from lunatics and idiots!

[peroon]

If you dont mind what's gonna be with Geotech forums than you are not real members! Stand up and rise voices! I apeal you! Dont let me be the only one here!

[peroon]

I just searched statistics. Metaldetector107 has 114 posts so far. Each post is staritng with :

"...Max QiaozhDear max qiaohz please help ..",
"..Dear Ivco Qiaozh Kt Max ..",
"..Dear Qiaozhe ...",
"..Dear Ivco Max Qiawzhe all friends please .."... etc...etc...etc...

It is always "HELP" , " i need.." , " ..problem.."!

Statistics:

- "help"....27 times,
- "dear"...69 times,
etc...etc...


Misspelled nicks like " Ivco, Qiaozh,Qiawzhe,Qiaohz,kt...." - endless!
Neither one time...and i will repeat; NEITHER ONE TIME nick spelled right!???

Always asking and always some trivial and stupid questions.
On absolute all of these questions there are answers and explanations through 154 pages of largest thread on this forum.
Obviously man is either total idiot and has no brain at all - either he is doing this purposely.
For what reason? Simply to nerving other members, to spoil and polute forum. To spam and to dilute all the subjects.
I am awared that there are pretty sick and mad people on this planet. But this does not mean those are free to do what ever they want.
There are special institutions for such lost cases.
We are not obligated here to suffer from such behavior.

In attachment i am posting simple .txt file with all md107 posts so far. I deleted only headers to make file smaller.
Read and enjoy!
If you find something normal in this .txt than i will shut up and never say anything else on this subject.
It is last time for administrators to do something. TO DELETE THIS "MEMBER".
TO BAN HIS EMAIL AND TO PREVENT HIS APPEARANCE IN FUTURE.
Or.... i will just give up and wont push this further...