IGSL

[6666]

I experimented a bit with the alcohol and graphite, the surface that you paint it on has to be very rigid, also it does not stick to plastic well and peels easy because there is no binder, spraying with plastic spray may work, but I dropped it.

[ivconic]

500 ohms and 1K works well in the real world. 100k ohms not so good. Wonder what the upper limit is for a good shield.


How well does the alcohol and graphite stick to the plastic ?

28cm concentric "spider" coil (Quicksilver series) for Fisher CZ5 (later CZ3D) is having approx. 2M (mega ohms) on coil surface, wherever the ohmmeter probes are touching it???
It doesn't make any difference whether the probes are touching closer or distant spots on it's surface, it always read the same value !???
I was more than surprised when tried that!??
A miracle? Special material?
And even more funny is; it is measured on upper surface of coil !
That's splendid coil with splendid performances.
But until today i haven't figured out what "secret" is laying behind that material?
I guess that's probably the most suitable material for coil enclosures, provides also excellent shielding.

[WM6]

also it does not stick to plastic well and peels easy because there is no binder, spraying with plastic spray may work, but I dropped it.

In this case plastic should be first treated with plastic painting primer.

[cnckecgo]

Igsl* is* very* good.
İf* you* have* time* can* you delete* iron chanell** and* only giving* signal gold* and* silver* İf* you* could draw* for* a* pcb for this* it* is* sensitive like fisher* gold* bug.
thank* you

[cnckecgo]

[Davor]

You can put a switch that will disable iron channel when you need it off, but there are advantages of keeping it as it is. When you overlap iron channel and coloured metal channel, you get a range of targets that indicate poor conducting metals, such as aluminium foil, and such. It also ensures that you won't lose sensitivity at the discrimination border, as you do with other arrangements.

So, say, you stumble upon a plated can lid. It is plated, and it lays flat, so any single tone discrimination detector will beep on a tin plating. But IGSL will also beep in a ferrous way as you approach it or move away - a situation when a coil "sees" the side of it, where ferrous properties are more apparent. Can lids with IGSL sound dah-deeeeee-dah. Also the modern iron cored coins. Other detectors don't do this.

When you set it properly, aluminium foil gets double tone.

[FatBob]

I'm a bit late, I just started building this board and am using Davor's mods.

When we combine the Disc circuits we end up with 2 100K pots in parallel
with a 10K fixed resistor. I just wondered if the 10K should be changed in
this circuit;

[Davor]

10k value sets phase tuning range together with 2k2 resistor. In my mods I tried to apply functionalities in a way that I kept most of the existing components intact. 100k potentiometers are easier to source, but a good motive to keep a relatively small parallel resistance is typically ridiculous variability of potentiometers' total resistance.

For this mod it is safe to replace 100k potentiometers with 20k, and throw away the 10k resistor. Argument in favour of this solution would be easier wiring, because lower impedance is less prone to pick up stray signal.

Frankly, I can't remember why I chosen one solution over the other.

[silverdog]

After a few requests I have had a small batch of IGSL-Minelab pcbs made, they are in the shop http://www.silverdog.co.uk/shop2/ind...product_id=115

[paun019]

Does somebody know why is tone of iron appears clean tone to 15 cm, and little deep than 15cm its not clean tone, have a noise ?

1€ with clear tone detecting on 33cm, but on 35 that have a noise. Descrimination is perfect

Its a Ivconic version of IGSL-Musceteer ?

Thanks

[der_fisherman]

If I may use simple words, at the maximum distance of detection increases, its basically saying that it is "unsure" of what the target is....the signal is probably overwhelmed from "noise", so to say.

You would not expect it to signal at all at say 1 meter? This is the zone where the good signal is not there any more....

I hope this helps.

[paun019]

In some of the previous posts, it was announced that the results achieved at 1 € via 35cm with a clear tone as can be seen on some videos.

With a small adjustment resistors R60, R38 / R36, R56 and R1 gets better bandwidth audio signal and range of 1€ is goes up to 45cm and it is also stable. I think in this set make that can achieve good detection I clear tons. If someone has an idea, he can experiment with these changes.

I expect an opinion on the proposal.
Thank you very much!

[Zizbag]

Hey silverdog. Just bought IGSL and Bara. Freaking awsome.

[ionut_mtb]

I just bought igsl musketeer board from silverdog. Can someone give me the exact schematic and part list for this pcb? Thanks

[ionut_mtb]

I can't tell for sure, because i never had chance to test it with one of those coils.
But i think that smaller diameter coil shall give better results, em flux is "condensed" and more "focused" through the smaller diameter, especially at "low power" detector as IGSL is.
I know TS1000 is obsolete and hard to obtain; pity, it was most versatile coil that i have seen so far. I have used it on several different detectors with great success. It is also pretty tolerant.
Smaller "sister" of TS1000 is TS800, maybe it will also give good results on such targets.
And third one i used is Tesoro Delta 9x8 concentric coil, usually coming with Tesoro Tejon and Vaquero, this one: [ATTACH]34624[/ATTACH]

if anyone need a coil:
http://www.ebay.com/itm/Minelab-Musk...sAAOSwa~BYc8E7