Minelab Explorer II Precise Frequencies Anyone?

[Kasiopea]

8 hours ago, Bill (S. CA) said:

Czy identyfikacja celu jest ogólnie problematyczna w przypadku detektorów wieloczęstotliwościowych? Używałem ich wszystkich, począwszy od mojego Sovereign XS i nigdy nie miałem problemów z TID, takich jak na przykład Vortex. Nie jestem inżynierem, ale nadal nie mogę pojąć, dlaczego Vortex, który wydaje się być całkiem niezłą koncepcją, po prostu nie może wyjść z bramki ze swoją nową technologią wieloczęstotliwościową.

it's amazing that having practically everything from Spectra v3i all the documentation, they don't do anything with it, they don't develop a really good multi-frequency platform If only they wanted to, they could create a really super universal and great detector.

[Guinea1]

9 hours ago, Geotech said:

To expand a little on your question, BBS, FBS, and FBS2 all used the same TX shown above. You'll notice that the 3.125kHz cycle is much stronger than the 25kHz cycle, this is why BBS/FBS was so strong on deep silver and not so great on small jewelry. They were primarily 3kHz detectors. The E-Trac did improve low conductor response a bit using the same TX, probably by just improving the RX processing.

Conceptually, TID on an MF design should be higher quality than with SF. But there are 100 ways to calculate TID and it's possible that Garrett is trying to do something that works well in some places but not in others, or maybe it has to do with how they drive their triple-axis ID system. Dunno, but because they chose a graphics display they have a lot of flexibility in fixing this or adding new controls. I'd hate to be facing this with a segmented display.

Carl, that’s the best explanation I have ever read regarding how BBS/FBS actually process the frequencies.  The third edition of your book is most definitely on my post-Christmas wish list, once I get off the naughty list for buying too many mental detectors!   

[Guinea1]

On 12/24/2024 at 5:30 PM, EL NINO77 said:

I'm not a scientist...but I also have an Etrac.../FBS/ so I was curious about what it's like with those frequencies...

Since I have some experience with measuring multifrequency in a detector..using an oscilloscope with FFT mathematics..so I measured the Etrac on different channels..to confirm or refute the claim that the Etrac is more sensitive to small targets on high channels...
the assumptions were confirmed..

  FBS MultyFrequency :Low frequency 3.3Khz + High frequency 25.4Khz

Happy New Year!  I was wondering whether you’ve tried measuring the frequencies used in the 3 types of multi frequency on the Rutus Versa?

[EL NINO77]

The Versa multifrequency works at frequencies of 8 -40 kHz... but the 3 types of multifrequencies are optimized multifrequencies for a certain type of target..,,for smoothing in salt water or in conductive terrain,,,and for low-conductive targets or for highly conductive targets... clearly there are more modifications than what I wrote..
one thing...:

let's compare FBS on shallow and deep iron..:

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and let's compare FBS on shallow iron :

 

 

[Guinea1]

44 minutes ago, EL NINO77 said:

The Versa multifrequency works at frequencies of 8 -40 kHz... but the 3 types of multifrequencies are optimized multifrequencies for a certain type of target..,,for smoothing in salt water or in conductive terrain,,,and for low-conductive targets or for highly conductive targets... clearly there are more modifications than what I wrote..
one thing...:

let's compare FBS on shallow and deep iron..:

---------------------------------------------------------------------

and let's compare FBS on shallow iron :

 

 

Interesting videos showing the difference between shallow and deep iron using FBS - thanks!  I think Rutus deserve tremendous accolade for producing the multifrequency Versa, especially considering they are basically a one-man-band without the benefits of an extensive R&D team to help them make discoveries or produce their products