Dominate Freqs of New Vanquish??

[pito]

To eliminate double sound try concentric coil, DD = not symmetrical, concentric = symmetrical = doesn't matter which way you swing. That should give more reliable VDI

[Mario-j23]

Concentric coils are not available

[ivconic]

Maybe I got it mixed up...
but I think I saw somewhere that Minelab now installs small pcbs in their coils with microcontrollers that give feedback to the machine and if that feedback isn't legit; the machine will not work with that coil.
Which makes making DIY coils almost impossible.
This was done probably for several valid reasons. But it's no consolation for us hobbyists.

[ivconic]

Minelab does not deviate from its old habit of using the same pcb for the whole series of models.
340 and 540, 100% identical pcb, the 340 does not have a "radio chip" and probably the upgrade to the 540 model is disabled.
Everything else seems identical to me.





I didn't even try to update/upgrade because the USB is deeply "hidden" in the box, but in advance I don't think it would even work.
They are not stupid in ML.
They probably adjusted some subtle little thing to make it impossible.
Or is the STM chip such that it has an encrypted part of the flash in which the type, ID and permissions are stored...

[ivconic]

My second outing with the 340 didn't disappoint either.
I found 4 Roman coins in a field where it is increasingly difficult to find anything.
Now I can already draw some conclusions.
Miracles do not exist and do not happen.
There is no magic.
The same problems that plague all other detectors; Vanquish is also suffering from.
With a note that Multi-IQ technology has brought a new quality, which is reflected first of all in accuracy and extraordinary stability in audio and VDI.
And what are the objections?
It's shallower than Deus 1, but in 80% of cases it doesn't matter. Because my typical targets are 5-20cm deep, most of them.
Very solid iron is a very good conductor. It will announce it in the highest pitch and give it a high VDI. Same as Deus1.
Thicker pieces of aluminum will give the same audio and VDI as a group of assorted coins.
The masking problem is still solved to a large extent, and this is where the Vanquish is far ahead of most detectors I've worked with so far.
Deus 1 successfully overcomes the masking problem if the target is a thick and large bronze coin.
But if the coin is small, thin; cannot overcome the masking problem; Vanquish can.
In All Metal mode, the Deus 1 also has an iron response similar to the Vanquish, but with the Vanquish it is much clearer and easier to detect.
Deus is too nervous, unstable and it's hard to find your way in a bunch of different sounds.
At Vanquish it is better solved. There is no confusion. Very nice behavior.
Conclusion; in most cases it is better to take the Deus 1 to the field because it is more versatile and much deeper.
But in some cases Vanquish will shine on terrains where Deus 1 is totally unusable.
And there are many such fields and cases lately.
I'd rather carry both with me all the time and switch as needed. But my backpack is tight and not enough for both. I will have to get a bigger backpack.
Until I get the money to buy Manticore. And that's on a long stick...

[ivconic]

One question for the experts: does the better conductor in the target correlate with the phase shift it will cause?
I think that with modern detectors there is less and less talk about phase shift and more and more the terms "better or worse conductor" are adopted.
And that with many audio and VDI it is first based on the conductivity of the target.
Is it possible that a thick piece of iron, a thicker piece of aluminum as well as a "thick" Roman bronze coin will produce the same phase shift?
The fact is that all three are "better" conductors. But do they simultaneously produce the same phase shift?
I haven't tried this myself in the workshop, it just didn't occur to me.
Very few of the truly intelligent among you will understand why I am asking this...

[Skippy]

Quote:"Is it possible that a thick piece of iron, a thicker piece of aluminum as well as a "thick" Roman bronze coin will produce the same phase shift?"
Iron targets will usually give three peaks in signal amplitude: one in the central location, the other two are 'inverted', and occur when the target is roughly below each of the two DD coils. Non-ferrous targets only give the one peak. Presumably one of the issues with 'large deep iron' is the tendency for the two side-peaks to be suppressed relative to the strong main peak, giving the false non-ferrous ID.

[ivconic]

Quote:"Is it possible that a thick piece of iron, a thicker piece of aluminum as well as a "thick" Roman bronze coin will produce the same phase shift?"
Iron targets will usually give three peaks in signal amplitude: one in the central location, the other two are 'inverted', and occur when the target is roughly below each of the two DD coils. Non-ferrous targets only give the one peak. Presumably one of the issues with 'large deep iron' is the tendency for the two side-peaks to be suppressed relative to the strong main peak, giving the false non-ferrous ID.

That's true.
This can be heard with most of the detectors as well.
But with Vanquish in AM is very noticeable and distinguishable.
That's because of the very good choice they made picking just right low tone frequency and volume.
Low tone is weak, "soft" and very low pitch, while the "center" is high pitch, sharp and louder.
I guess I can adjust the Deus to simulate this too.
Although it would be hard to beat ML audio "softness" for a low tone.

[ivconic]

Got smaller coil too: