IGSL

[dfbowers]

Agree; Minelab coils can be bit more expensive for a typical hobbyst budget. Some people can afford and some others can not.
So it is good to check majority opinion - i agree.
Silverdog, do collect orders before you decide which version to make.
In case majority still wants to make last version and most of them can not find original Minelab coil - there is a way to make it!

Already known 255x137mm "D" form (for 27cm DD coil):
- TX=1mH, 42 to 45 windings, wire 0.5 to 0.55mm
- RX=14.7mH, 165 to 175 windings, wire 0.22 to 0.25mm

Resistance at IGSL is not issue, as it is at Musketeer (wont oscillate if TX is over 2.5ohms) - so do not worry about it.

Both "D" shaped coils are shielded with Faraday cage. Both cages are connected together to TX ground lead (in coil) .
Cable from coil to detector is double coaxial (as on original TS coils).
Rx leads are "hot" and "shield" - but that "shield" is not connected with main GND (shields) in coil housing.
Also RX "shield" is not connected on pcb gnd - it is connected just to inverting input of LM833.
Coils are nulled to have minimum possible residual voltage (measured on original TS 1000).

I am suggesting last IGSL version and Minelab coils (or copies) because that version is showing really better performances.

But also there are number of people who already made TGS/TGSL and suitable coil for it.
So those people can just make first IGSL version and use already made coil for TGS/TGSL.

So ... it is hard to predict numbers of which pcb would more likely to be wanted!
That's why is smarter to start some sort of voting and collect majority opinion.
Cheers!

Ivconic,

I will undertake the challenge of duplicating your "Minelab" coil above. I have to!! It does look like the Tesoro Cibola/Vaquero coils are just about the same inductances as the Minelab coils as well.

I tried unsuccessfully to breadboard the oscillator section and get it to run with my Cibola coil this evening. No matter what, I could not get the Tx Amplitude over 2v. Not giving up yet.. I'll start fresh tomorrow!!

Don

[bernte_one]

hello

if the decision falls to musketeer coil- is anyone able to post guide for coil wiring
(like tgsl coil making) with nice shematic (picture) ? plz

[ivconic]

hello

if the decision falls to musketeer coil- is anyone able to post guide for coil wiring
(like tgsl coil making) with nice shematic (picture) ? plz

Something like this...

[ivconic]

And; PCB side....

[bernte_one]

nice drawings many thanks

[cnckecgo]

http://b1107.hizliresim.com/11/7/27/391.jpg
I could not understand what this place is a kind of help please

[dfbowers]

And; PCB side....

Ivconic,

Excellent artwork and a great contibution!

Don

[Jerry]

http://b1107.hizliresim.com/11/7/27/391.jpg
I could not understand what this place is a kind of help please

Two of the spots marked in red on CD4044 - U2 are to be connected to D1 and D2.
D1 goes to pin 4 and D2 goes to pin 5 of U2. The pad for pin nine was for Ivconic's earlier version. You can use it but will give you a higher tone.

Jerry

[nejdet]

IGSL

Good day Ivkoni. I want to ask does it matter where you turn on the monitor and had to symmetrical to the Faraday shield. Faraday shield the receiving coil is not symmetrical with inclusion. Thank you! Good day Sorry for bad English

[ivconic]

Good day Ivkoni. I want to ask does it matter where you turn on the monitor and had to symmetrical to the Faraday shield. Faraday shield the receiving coil is not symmetrical with inclusion. Thank you! Good day Sorry for bad English

It doesn't matter. You may place inclusion, gaps and naked wire wherever you want. Wherever is convenient to you - you place it. It will not affect performances...

[ivconic]

Two of the spots marked in red on CD4044 - U2 are to be connected to D1 and D2.
D1 goes to pin 4 and D2 goes to pin 5 of U2. The pad for pin nine was for Ivconic's earlier version. You can use it but will give you a higher tone.

Jerry

Yes. I didn't connected those, because i left it to subjective choice. Choose 5&6 or 5&9 ... or 6&9 if you like. Experiment. Also there are more choices, you may include some other 4024 divisions if you like.

[nejdet]

IGSL

Thank Ivconic

[nakky]

My 2 cents.
Because Ivconic is back on the Forum.
10x10 cm.
Not checked.

[der_fisherman]

Hi Nakky,

firstly it looks very, very good. Thanks.

May I ask you a couple of questions?

1) I always feel its a good idea to put a version number on each and every PCB I ever made. In this case its a "Nakky", but if further changes are made, then I personally do see the need to add a version, "Nakky 2.0" for example for the next one etc.. This was something I was going to mention to any of us here making changes and corrections to Ivconics PCBs, but neglected to say up to now.....

It also helps dramatically when trying to help someone to fault find online when you cannot see which PCB they are using....

2) How were you able to do this as as far as I am aware, Ivconic has not yet published the final versions of the schematic (either one and I know from personal experience that the one available online is way out of date, or did you just take one up to date PCB and move stuff around till it fitted? (Been there done that!!)

3) Which version of the two current ones is this? Or should I say, for which coils? Or have you taken up my idea for a dual PCB with places for either components, which appeals to me personally as "why should I be forced to one or another coil when populating the PCB?" or even we should think to spare Silverdog the need to make two versions, but I think I am the only one who has any interest in that direction - sadly! But I hope SilverDog picks up on my idea!!

HEY SILVERDOG SAY SOMETHING!!!

4) My compliments on achieving the size of 10 x 10 cm PCB, that is very important (I am told by S-D) for the price that he will need to charge, so that was a very important fix. Sadly I don't have the Abacom software as I prefer and have Eagle from Cadsoft which is not compatible at all.

5) I would also like to point out that probably the names "Nakky" and "Ivconic" on the PCB are probably spelt backwards as they are on the green layer (copper), which is the bottom copper layer and when viewed from the top, should be reversed. ISGL on the same layer appears correctly backwards and is also in Green. I cannot prove that completely as you have not posted a PCB, but an image of the PCB only. I would imagine its designed as a single sided one as there are wire links usually....

Nakky, we don't know each other well (I hope that that will change!), but as with most people on the "trail" of the Ivconic Metal Detectors here, you are a great asset. From me personally, to you and all the rest, many, many thanks!

regards

Andy

[der_fisherman]

I just also noticed that it appears that you didn't correct the various "Yellow" solder pads that should be changed to the lower (green) level either, you probably didn't notice them, but they are on the same level as the wire links if I remember correctly....

Perhaps Ivconic has some special reason to have them where they are?

regards

Andy