New Impulse Video

[Joe Beechnut OBN]

1 hour ago, LowTide said:

This may turn out to be somewhat of a mute point.  With the initial released info that the detector was rated for 1 meter depth, it appears that this was designed as a shoreline detector meant to be used at waters edge.  The 1 meter rating would provide protection if dropped into the water.

The later 3 meter figure suggests an attempt to turn this into a wader type detector which would be fine in fresh water.  Because, further info reveals that the detectors ground balancing system will not be able cancel saltwater and allow detection of small gold, with the coil submerged in saltwater.

So the question remains open as to how stable will it be in say waist high saltwater with waves rolling in?  Will it's depth be similar to existing PI's?  How stable will it be compared to existing PI's?  What about the salinity levels at various geographic locations? 

My same questions, was it tested in  rough waters.....saltwater and black sand ..chest deep. 

[Lance]

4 hours ago, LowTide said:

This may turn out to be somewhat of a mute point.  With the initial released info that the detector was rated for 1 meter depth, it appears that this was designed as a shoreline detector meant to be used at waters edge.  The 1 meter rating would provide protection if dropped into the water.

The later 3 meter figure suggests an attempt to turn this into a wader type detector which would be fine in fresh water.  Because, further info reveals that the detectors ground balancing system will not be able cancel saltwater and allow detection of small gold, with the coil submerged in saltwater.

So the question remains open as to how stable will it be in say waist high saltwater with waves rolling in?  Will it's depth be similar to existing PI's?  How stable will it be compared to existing PI's?  What about the salinity levels at various geographic locations? 

My exact thoughts and questions. Really hoping it performs well in saltwater., but the initial 1 m waterproof rating also makes me think it was designed for the wet sand area.

[Rick K - First Member]

I’m reasonably sure the - at one time - rumored 1 M rating was info based on the state of development of the AQ mechanical package at the time - it very likely had NOTHING to do with the electronic performance.

I believe that Alexandre has already pretty much answered the question when it was posed in the form of - “my former PI beach machine needed to have mpulse delay increased to XX to operate in open water and the AQ highest pulse delay is 17 microseconds - how can that be?” Alexandre’s answer if I recall correctly was basically that careful circuit and coil design made it unnecessary to provide for longer pulse delay settings in any “non deep diving” situation.

[Steve Herschbach]

I have read posts by Alexandre stating the Impulse is locked permanently in “salt mode” even in all metal mode, and that there should be no expectation it will detect tiny gold items. In fact it is by design excluding small aluminum in order to focus of gold rings to the exclusion of almost anything else. This implies an insensitivity to saltwater that should be in favor of stable operation at depth.

You can’t really complain the detector will not pick up small gold items then turn around and get overly concerned it might be too sensitive to saltwater. It’s one or the other, and the machine is stated to be insensitive to saltwater, small aluminum and small gold by design. In any case this is the reason why we have a pulse delay control and a sensitivity control so it seems to me like concerns over saltwater stability is a blown up issue. It’s not like the machine is preset with no adjustments available.

[dewcon4414]

Carl once mentioned .... the IP rating as far as depth is mostly left up to the company and how willing they maybe to stand behind it.   Obviously there are written IP standards leaving a lot of flexibility.    Was this changed after a good many hours in the water?    I heard someone was a tester in Hawaii...... if so they might answer a good many of those questions.    They have said it will run in most cases at 7uS quiet in the salt water.   IF its going to ..... it most certainly should here in Fl.    I may be wrong, but i think currently there are only a few using 10uS .... the DF is 15 and its a bit chatty out there.   Some maybe saying it has the ability to run at 7us...... but will that happen in the salt water.... moving especially.   Thou most of the time that chatter comes from coil control...... or lack of.

I agree Steve ...... theres no free lunch in the salt water.   Testing will determine..... what small gold might be lost on that end in the water.  However..... for the most part the machine we now use ARENT getting that small gold either.   And ..... no i wasnt implying you didnt have the experience....... simply most are going to find it a challenge since they are used to DD coils.   Oh...... thats going to be a lot of fanning lol.

[Rick K - First Member]

5 hours ago, Steve Herschbach said:

I have read posts by Alexandre stating the Impulse is locked permanently in “salt mode” even in all metal mode, and that there should be no expectation it will detect tiny gold items. In fact it is by design excluding small aluminum in order to focus of gold rings to the exclusion of almost anything else. This implies an insensitivity to saltwater that should be in favor of stable operation at depth.

You can’t really complain the detector will not pick up small gold items then turn around and get overly concerned it might be too sensitive to saltwater. It’s one or the other, and the machine is stated to be insensitive to saltwater, small aluminum and small gold by design. In any case this is the reason why we have a pulse delay control and a sensitivity control so it seems to me like concerns over saltwater stability is a blown up issue. It’s not like the machine is preset with no adjustments available.

I agree Steve ...... theres no free lunch in the salt water.  Testing will determine..... what small gold might be lost on that end in the water.  However..... for the most part the machine we now use ARENT getting that small gold either.

[Tony]

It’s also important to remember that “still” saltwater allows for quicker delays than “moving” saltwater. Working in 5 feet of calm saltwater is far easier (in terms of running shorter pulse delays) than 1 to 2 feet of fast moving saltwater.

[okara gold]

Well... I guess we do have to leave some small gold behind for the next generation of hunters or they'll have nothing to look for!  ☺️

[LowTide]

For a very long time this detector’s great claim to fame via forum postings was the ability to simultaneously ground balance against Black Sand AND Saltwater.  The timings on the control panel would lead one to believe that there was a True Saltwater ground balance capability.  That coupled with aforementioned hoopla would infer that those timings could be used in the surf with full sensitivity against small gold targets.  A True Saltwater ground balance capability would also infer that the detector was immune to wave action and poor coil control.   Apparently this is now not the case and there is a Saltwater “Compensation Function"(Desensitizing).  So it now appears that “in the water” this detector will provide little additional benefit against existing products.  With this in mind, price point is now going to grow in importance, especially compared to used PI’s where this may end up at a 3X or 4X multiple.