ALEXANDRE TARTAR

18 minutes ago, deborah195412 said:

Yes, According to what I read. The 11.5 setting was actually a last minute change to 15uS. Because of this last minute change, I'm assuming they knew a problem existed for working submerged in salt water. Out of the water on the wet sand beach, this machine is great.  Working here in Pensacola, in the water, A lot of the modes are not able to be used to the fullest extent with the 12.5 inch coil. I'm looking forward to trying the 8 inch coil when it is available to see how much of a change it makes. I do realize this machine was designed for use in the wet salt sand at waters edge. the capability of the machine is limited when you enter the water with the 12.5 inch coil.

It is not because there was a problem that one put 15us, it is simply that Steve has recommended it to me in a conversation, so I programmed it for safety. I'm publishing a video today on the forum to show the normal behaviour of the system in the sea water...

Actually, the last pulse delay (11.5) is actually 15us. It was a last second change to better accommodate full submersion.

But I can add 20us for the next version

Beginning of next year. The mechanics are in the process of being manufactured.

Battery: There is no problem, the autonomy is simply 3:30 in the most powerful mode. On the worlwide version you can find the 3500 mah li ion battery cells inside the upper shaft.

High temperature enclosure: This temperature is normal, and the enclosure passes all outdoor high temperature tests.This is what differentiates, it's  the more sensitivity and power that the other models from other brands.

Noisy coil in the salt : It is a phenomenon which was recently reached us, it is 2 detectors on the series, we study a problem on the coil shielding on these 2 models.

Short shaft: The lower shaft has been lengthened.

Cable connector : When we have a plastic connector it is a well known phenomenon, it is not a problem. The other brands use a plastic connector and have the same phenomenon.
I am currently evaluating the metal connector with integrated shielding to differentiate us from the competition, these connectors are very expensive and nobody uses them in the market because of the price.
If these connectors pass the seawater resistance test, they can be used for the worlwide version.

17 minutes ago, deborah195412 said:

It is the same when only coil is submerged.

 

Hello Deborah,

So it is possible that there is a problem with this searchcoil, we will send you a new searchcoil.

I validate this by email with you.

The answers we have for other prospectors on this forum do not have this type of problem in the same conditions.

Alexandre

29 minutes ago, deborah195412 said:

First time out with my new Impulse AQ. This unit had great stability on the beach. Once I entered the water, it was another story. In salt water it was very unstable in the all metal mode. I went through all of the pulse delay settings and the most stability was achieved at a pulse delay setting of 11.7. Even at that setting it was very unstable. I had to increase the ats setting to 10, Sensitivity to 2 and scrub the coil slowly on the bottom to get anything resembling stability. Every time the coil was lifted from the bottom, even a tiny bit, it went full audio. There is no way I could sweep the coil. I tried other modes with the same results. A second time out with settings recommended by Alexandre in the volcanic sand mode and trying to ground balance with the Reject control,  no change. I tried all different pule delays with Sensitivity as low as 2. I also Tried Willy's test pinching the coil seemed to work fine. I have tried 2 different areas, one area was in the open Gulf. Hunting conditions in shoulder deep water, small waves <1 ft. While coil still on the bottom, when a wave passed full audio. Second condition Flat water, shoulder deep in Pensacola bay, Still not able to sweep the coil. lift it 1/2 inch off the bottom and goes full audio with all settings and modes tried.

 

Hello Deborah,

Do you have the same result when you don't immerse the enclosure in water?

But when you detect only with the searchcoil in the water ?

Alexandre

Here is the stability video of the impulse AQ in 36 PSU (sea surface salinity).

Here it's just the searchcoil going into a puddle with dynamic sweep, but it gives you an idea of the behavior.

Here we were at 7 us delay but I do not recommend.
I recommend 11.5us in the water and a sensitivity of 4 maximum. (3 is good) Sensitivity is not linear.
Between 4 and the max you may only gain 15% but you will lose all the statibility.

You can see that the ATS stabilizes well, it recalibrates very quickly.

If you do not get this result there is potentially a problem with the searchcoil.

I am currently checking with the customer if it is not a problem with the coil...

Thanks for your messages ! 👍

Here are some videos.

It should be noted that everything depends on the nature of the metal of the hairpin or the iron nail, its depth, its angle etc ...

We hear the double 'wooo wooo' on the hairpin and on the iron nail.

Here is the best sound you will get, when the target is deeper the experience will allow you to recognize the target.

It reminds me of Le_Jag's story from last year.
Rommel's "asparagus" (2nd world war) appeared on one of the French beaches, denis was warned a little late of this phenomenon. 6 prospectors equipped with Minelab were present for a week before his arrival with the IMPULSE AQ. They were still there when Denis started to detect.

It was an unbelievable shame when the IMPULSE AQ beat the MINELABs. We are talking here about 10 against 1 gold jewels found for the Minelabs and at 1 prospector against 6.

I think it's a good example, An article was written in the French magazine "Monnaies et detection"

This is what you can expect when you know your equipment well and also know the research areas well.

Switching from VLFs to PIs is often difficult.
You come here from another world.
The Impulse AQ is extremely sensitive and powerful compared to an Equinox or Excalibur. The IMPULSE AQ can even relegate them to the rank of toys in certain situations.
It will already take you several months to tame the beast if you know the PIs well, and it will take you even longer if you only know the VLFs. You may lose a little time at the start but you will certainly find a lot of gold more in a year of detection. (if your goal is to find more gold).
Otherwise there is no point in continuing with the IMPULSE AQ as much as using a Minelab. But that would be a shame, because you leave the possibility that other prospectors will detect before you on the static areas and not leave much at reasonable depth for a Minelab.

We can help you get what you want.

1st For each situation a specific use and settings (wet sand, underwater, magnetic ground, ....)

We need to ask you several questions. (sorry)

What types of soil do you want to detect?
What kind of soil did you start on?
In which detection mode do you want to detect?

What is your swing speed?

Too often we see prospector using VLFs sweeping too quickly. Not that the IMPULSE AQ isn't fast on the contrary, but it will lose precious inches and the smallest sounds (the most interesting)

Regarding the battery, I advise you to charge it the day before your outing at the latest and not to leave it plugged into the detector while waiting. The high capacity NIMH discharges quickly in the air, here the IMPULSE AQ needs the smallest mAh of power available.

Here is a setting that I recommend on wet sand to begin with (non-volcanic and not underwater).

MODE: ALL METAL OR MUTE
VOLUME: 7
SENSITIVITY: 3
ATS: 9
REJECT: 8 *
PULSE DELAY: 10 or more

If the small gold targets sounded like a huge target, its because it was close to the surface.
For a powerful device this is what usually happens.

In extremely polluted areas some prospectors only dig on small sounds, because they believe that the others could not be forgotten by the VLFs and are therefore trash.

In ALL METAL mode, to confirm and obtain quality and recognizable sound signals, simply raise the searchcoil to the limit of detection to hear the double beeps, it is also necessary to cross the swing. A hairpin will not sound the same in both directions.

You should know that even with the settings of the IMPULSE AQ at 25%, the IMPULSE AQ will always be more powerful and sensitive than a Minelab.

So you should not try to optimize the settings directly when starting with this new detector.

In my laboratory (a little noise but less than inside the factory):

3. US Nickel Depth min. = 17.5 inches (in my laboratory air tests)
4. Gold Ring Depth min. = 18 inches (in my laboratory air tests)

By JOE on wet sand :

3. US Nickel Depth min. =    >19+  inches (on wet sand)

7 minutes ago, Elbert said:

Would you mind listing those parts?

Thanks you,

El

The battery will disappear, the battery cable too.
4 lithium ion cells type 18650 will be inserted into the tube with a anti fall screw cap .

The redesigned armrest becomes sliding.

2 minutes ago, cdv said:

Joe, that video showed just what I wanted to see/hear.....thanks....but what about the full length version.....   🙂

Cliff

It's the the results, same board, same settings, but with different mechanical parts....

1 hour ago, Steve Herschbach said:

Long story short your results unfortunately do not surprise me in the slightest. That results like this would be seen was obvious to me as soon as I saw the picture below posted back in December of LE.JAGs finds using the AQ on a volcanic sand beach. The rings are nice of course, but look at the junk dug doing so, which mirrors the type of junk you dug. If the location has the rings, great. But if not... well, all you are going to do is dig junk, and lots of it. Even before I saw the picture though I was expecting this. It’s just the nature of the technology being employed. It’s still a PI. The best I’ve used yet if I overlook the battery system... but still a PI.

It's not Le_Jag (denis)

It's another person whose name is Denis but who doesn't spelt the same way -->  Denys

He lives in Reunion, and uses BBS. He is not used to PI detectors.

So he picked up all the targets during 7 days (3 hours per day)

The Jag certainly wouldn't have had as much iron junk...

I believe that Le_Jag on one of the last IMPULSE AQ V2 prototype, the pulse delay is at 5.5 µs on wet sand but it will be necessary to ask him, I do not remember. (I believe that at 6µs it is very stable.)

We can improve between 3 and 4 inches for the 18k 2.5grs rings with the new experimental IMPULSE AQ systems.

But with Le_Jag we came to the conclusion that we can no longer dig, gaining numbers of holes vs finds is not in our favor.

Here mixed sand is not the most difficult because the mixture is homogeneous.

And the FE2O3 % is not important...

"ZIT" ZERO INCH TECHNOLOGY   

55 minutes ago, Steve Herschbach said:

So in your opinion Alexandre, MUTE would be preferable to TONES in heavy magnetite, heavy but not so bad that VOLCANIC must be used?

This is a very good question and I see what you are thinking ...

For the gold nuggets reseach with an AQ:

In heavy magnetite, the TONE mode and MUTE mode will not work. It does not mask enough.
I prefer to talk about cutting or masking magnetic ground rather than talking about balance.
You would not be able to easily obtain a ground balance as on the TDI for the search for gold nuggets with the AQ. It's depends of the ATS setting ...

Only the volcanic mode can mask correctly this type of ground, but you will hardly find the point of equilibrium because in general you will be well beyond this point when the ground is masked)

Much of the very gold nuggets is therefore eliminated due to the attenuation of the signal caused by strong masking.

On the wet sand:

At the beach when there are concentrations of magnetic sand the detector will sound like an iron nail at this place, so it will make a low pitch in TONE mode.
If the sand is made up of different layers that undulate in depth, the bass sound will vary continuously.
In Mute mode, the magnetic sand layers are masked (but not balanced, we are not on the point of equilibrium we are well beyond when the ground is masked)
This does not prevent finding the gold jewelry.

If it's too strong, we must used the VOLCANIC SAND mode.
And again, this does not prevent finding the gold jewelry.
You will reduce the depth due to the attenuation of the signal caused by strong masking.

But we must not forget that for all the other detectors it is a zero inch detection!

5 minutes ago, Compass said:

Since there seems to be less trash in the dense black sand wouldn't All Metal mode be preferable for the additional depth? Sorry if this has already been addressed.

No because this type of sand is magnetic, we can say ferrous, so the ALL METAL mode detects the variation in thickness of this sand and it sounds everywhere.

If the MUTE mode is sufficient to cut this type of sand, it is preferable to use it, because it will increase the depth of detection.

If it is not sufficient as steve says, you must switch to VOLCANIC SAND MODE, if you have arrived in this mode it means that no other detector will work. In this case, a 20 grs gold signet ring put on the sand will make no sound with a VLF or BBS.

I'm desperately trying to find the videos!

9 hours ago, Badger-NH said:

It's funny how many people seem to automatically think that everyone will be using the AQ for water hunting.

Nobody water hunts the beaches north of Cape Cod.  That's because our large tides leave so much wet sand that the water beyond that is too insignificant to bother with.  Even that is accessible without getting wet on the monthly negative tides.

We have no need for detectors to be waterproof at our beaches.

You're right and yet this is where it is most powerful! And where he shows his full potential ...

3 minutes ago, Yellowstone said:

Alexandre, that is impressive.  Thanks for sharing!

No problem, these are phenomena that only appear part of the year on a few hundred kilometers of beach in ours country.
No detector works, it's like trying to detect on an iron plate, in ALL METAL mode the detectors sound everywhere and in discrimination mode the detectors make a permanent sound cutoff.

IMPULSE project started from a bet with a friend that it would be impossible to detect through this sand with a new metal detector model.

1 hour ago, Yellowstone said:

This is the type of beach hunting where I see that the AQ will shine.  Here’s hoping I get to test it this summer.

This type of sand ? 

MUTE MODE or VOLCANIC MODE.. NO PROBLEM

The answer is simple: there are only 99 IMPULSE AQ LIMITED....

 *** And that will allow me to find my future testers for the new technologies to come, already developed or under development ... ***

18 minutes ago, Chase Goldman said:

Alexandre - Would having a third party external transceiver in close proximity to the headphone port be an EMI concern or is it sufficiently isolated and distant from the control electronics to be a non issue?  If that is not an issue, could a transmitter be placed internal to the aft power/audio module, isolated from the control electronics, and fed analog audio directly to provide that wireless feature in a future iteration of the design (a simple switch could reroute the audio between the transmitter and the headphone port)?  Another advantage of that placement would be that it would be less likely to be submerged during wading detecting because it would be at the highest point on the detector as opposed to the control panel thus maintaining line of site transmission.

If a 3rd party transmitter “dongle” setup is not subject to causing interference, would like to see anyone’s practical implementation.  I’m just not visualizing a practical implementation/approach for that setup even if you take the EMI issue out of the equation.

For a dongle no problems...

16 minutes ago, Badger-NH said:

That's unfortunate that the AQ is affected by Bluetooth transmissions. I was hoping to go wireless.

I rarely use wired headphones anymore.

The impulse AQ is not performed by bluetooth if you use an external module.

It is affected by bluetooth only if the engineering puts and a module in the enclosure

All detectors are affected by bluetooth if the module is in the enclosure, only many detectors are not sensitive enough to see it.