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New Fisher Impulse Gold Land Based Pi, What Features Would You Like?

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I was wondering what features in the new Impulse Gold detector you nugget detectorists would like to see in this new  machine to make you buy? For myself the lightweight part is very important, I would also like to see solid coils for ease of use in uneven terrain, and I would like to see gpz type performance on surface grain size gold and would like to see gpz type performance on 1-2 gram nuggets at depth. Not real concerned about deep large nuggets. Auto ground balance would be a huge plus too. Perhaps the 7 usec timing will be enough to produce gpz type performance on grain size and gram size gold. Time will tell I guess.

I don't expect Minelab will be sitting still with regards building a lightweight nugget detector flagship model, sooner than later probably.


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A built in speaker is a must and would add almost nothing to the weight of it, just use the same speaker as the Gold Bug Pro and add volume control to it, that speaker can blow your ears off and it will already be sitting in stock at Fisher.  Wireless audio is also a given, this isn't the 1990's although if I'm not mistaken that would be a first for Fisher.

A range of coils is vital, if it could use GPX coils that would be an extreme positive and I think would help sales of the detector a lot.  Don't try tell me it can't be done, the QED had 7uS and could run the GPX coils.  Obviously some work better than others and some coils need the timing raised, but that's for the end users to work out if they want to use their existing GPX coils., Fisher can supply their own range of coils too.  OPTIONS!

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It’s officially Impulse Gold, so I took the liberty of editing your post to reflect that.

I’ve been trying for years to get Minelab to put a SDC 2300 in a standard detector housing and outfit it with a set of standard accessory coils. Don’t care about waterproof in the desert. Waterproof is nice, but not if it adds a pound or more. Waterproof should come with little or no weight penalty these days, and the Equinox proves.

So if Fisher just made something with SDC equivalent performance with 8” coil, but with better depth on large gold by way of larger coils, in an ergonomic package, at a reasonable price (under U.S.$2K)... I’d be thrilled.

I agree with Simon, a decent external speaker would be great. The speaker on the SDC sucks. It’s poor volume to start with, but then aiming it directly away from the operator makes it worse.



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Simon, I agree with you, if the minelab gpx style coils would work  you would have a wide range of all sorts of coils available immediately for use with the Impulse Gold. Would be very popular for sure. I know I love my Elite and Evo coils.

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Yup, why reinvent the wheel, we have a huge amount of coils available so it makes sense to take advantage of that if possible.  It's far more likely GPX users will buy a Impulse if they can use their existing coil investment on it.  It could be the cheaper ergonomic lightweight alternative to an SDC people have wished for, and they could run their existing coil stock or buy any of the readily available GPX coils.   I am confident it would be a good seller.

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1 hour ago, phrunt said:

Yup, why reinvent the wheel, we have a huge amount of coils available so it makes sense to take advantage of that if possible.

Because they have already reinvented the wheel to make coils that run at 7 uS for the Impulse AQ. Nice thought, but it is unlikely Fisher could gain any performance benefit by using Minelab coils when the coil tends to be one of the major limiting factors on getting a detector to work properly at 7 uS. I know that was a major hurdle for First Texas to overcome in manufacturing, and still may be. It is a far better bet to assume that the Impulse Gold will be coil compatible with the Impulse AQ. Hopefully we will see coils made just for prospecting however, as the round open spoke coils are more for in water use.

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Well who's the party pooper 🙂

Well, the speaker would be a huge bonus at least.

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Well, he did ask for a wish list, and we can always wish. Nothing says I'm right, just an educated guess. :smile:

I was after all one of the reasons the TDI ended up coil compatible with Minelab coils. Or at least when the question came up I voted that remain a top priority in the final product. I'd love it if there was somehow a way we could have over 100 accessory coils available for the Impulse Gold out of the starting gate. Or at least maybe compatibility with the Coiltek coils made for the SDC 2300?

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The ML coils would negate the advantages of the Impulse Gold. Alexandre has specialized in building advanced PI coils for MANY years. You can “go fishing” in the forums - especially in Europe and find references to Alexandre repairing Eric Foster coils or building new ones for Eric’s detectors for folks after Eric stopped doing that kind of work.

Every aspect of the AQ and the Gold is designed to work together to optimize the functionality and performance of the device at “The Job to Be Done”.

That’s why the AQ “Rejecting” silver coins isn’t a problem. In terms of the “job to be done” of finding gold jewelry, silver is an unwelcome distraction - FOCUS

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If it meets the following criteria, it should be a success here in Oz.

1. Must be able to handle highly mineralised soils. If it can totally blank out hot rocks like most modern Minelab's do, that will go a long way in becoming a success

2. Long run time, preferably 10 hrs plus

3. At least as sensitive as the SDC

4. Good EMI immunity

5. A good range of coils - three different sizes at launch is a good target 

6. Light but also robust. I.e. don't shave too much weight and we're left with a very flimsy toy. 

7. A manual analog frequency tune pot. 

8. An adjustable tone - probably should be top of the list! 


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