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Re: how many diff. friq. does fbs use at one time?
Posted by: "Carolina"
Date: October 07, 2017 07:37AM
Wayfarer:
Thank you for your time and trouble, but for me, the water is still muddy. Not sure where I see the output frequency " shifted as a percentage " . I also am not sure how you determined the spike at 90 is " some kind of EMI ". Maybe if you could draw some arrows with quotes a pee brain such as myself could grasp what you are trying to show us. I see the strongest spikes at 3.125 & 25 but can tell no difference from say 90. Also how can you disregard the other spikes as not being frequencies? Just trying to understand but maybe to much for me. Thanks again for your help.



MINELAB CTX 3030
MINELAB Excalibur II
MINELAB Excalibur 1000
MINELAB Excalibur Gold Sword
VALLON VMH3CS
WHITES Dual Field

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Re: how many diff. friq. does fbs use at one time?
Posted by: Wayfarer
Date: October 07, 2017 07:52AM
Carolina, thanks for your questions. I know those extra spikes are noise simply because they were present *before* I even turned on the detector. This is EMI from various indoor sources such as LED lights, power transformers, "wall warts," electric motors, and so on. I took a reading inside my house before the test without the detector, and it showed me the exact signals that were EMI. I attached the picture of the noise and you can see what these signal are that I disregarded.



What I mean "by percentage," can be seen by how much the frequency shifts at the lower end, like the 3.125 kHz, which isn't very much, maybe 0.5 kHz, and the amount of the shift progressively grows bigger until you get up to the 25 kHz which shifts from about 23 kHz all the way up to 28 kHz (going from Ch 1 to Ch 11) for a 5.0 kHz shift. The lines at the lower part of that screen shot are a historical plot showing the last 10 seconds or so of the signal output so you can see how it changes over time. Hope that makes sense now.

Ksdirt, he two strongest frequencies are 3.125 kHz and 25 kHz because they are the two tallest spikes. All the other frequencies are likely harmonics, although I'm not sure which ones are the true fundamental frequencies without looking a lot closer. The two strongest frequencies 3.125 and 25 are not necessarily fundamental freqs since the signal strength of each freq can be increased or decreased using filters and other electronic circuitry. But the fact that those two are the strongest, shows that those are the main two that the detector uses since ML wouldn't've designed it that way without a reason.

But it's still muddy, even for me, because there's really no telling which of the additional frequencies the detector uses without knowing "what's under the hood" in circuit design and software. But at least it's a start and shows the main two freqs...and shows how the Noise cancel actually affects the frequency.

Once I get the Equinox in hand, I'll be able to run the same kind of tests.



Current detectors: White's V3i, MXT, XL Pro
Past: White's XLT, 6000D Series 3, Coinmaster 2DB, Minelab CTX 3030, Fisher Gold Bug Pro
Location: Western Idaho
Enjoying this great hobby since 1980



Edited 2 time(s). Last edit at 10/07/2017 07:59AM by Wayfarer.


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Re: how many diff. friq. does fbs use at one time?
Posted by: amberjack
Date: October 07, 2017 08:23AM
would make sense if what they have us believe, 25 ground cancel 3 for finding targets , and why FBS is good on silver/copper...

thinking the EQ is based off a xterra platform as FBS dosnt fit in a small box so just reading between the lines no proof, but it sure sounds like a 705 and about the same depth just hope they have fixed the coils as while the 705 can be an inch deeper than FBS its minelab coils are well bad, only run after market coils on 705 , granted their newer coils are getting better (FBS-CTX) so fingers crossed hey. :biggrin:

if it is based on the 705 it should be a good all-rounder if I was just looking to have one detector maybe this could be it, but then I have a lot of time on the ones I have do I want to waste all that time and trade down and learn again, not at this point but keep an open mind and see what unfolds..

I see the monster was a flop here and the go fiddle even worse so lets hope they have upped their game only one success in 5 years GPZ so fingers crossed for them :biggrin:

AJ

Re: how many diff. friq. does fbs use at one time?
Posted by: "Carolina"
Date: October 07, 2017 10:08AM
Wayfarer:
Thanks for the expination as it is becoming somewhat clearer maybe. If I were to take a guess, would channel 8 be the closest to 17kHz according to the graph?



MINELAB CTX 3030
MINELAB Excalibur II
MINELAB Excalibur 1000
MINELAB Excalibur Gold Sword
VALLON VMH3CS
WHITES Dual Field

Re: how many diff. friq. does fbs use at one time?
Posted by: D&P-OR
Date: October 07, 2017 11:20AM
Hey AJ------Where you been in all this??----and---why was the monster a flop in oz?
Quote
amberjack
would make sense if what they have us believe, 25 ground cancel 3 for finding targets , and why FBS is good on silver/copper...

thinking the EQ is based off a xterra platform as FBS dosnt fit in a small box so just reading between the lines no proof, but it sure sounds like a 705 and about the same depth just hope they have fixed the coils as while the 705 can be an inch deeper than FBS its minelab coils are well bad, only run after market coils on 705 , granted their newer coils are getting better (FBS-CTX) so fingers crossed hey. :biggrin:

if it is based on the 705 it should be a good all-rounder if I was just looking to have one detector maybe this could be it, but then I have a lot of time on the ones I have do I want to waste all that time and trade down and learn again, not at this point but keep an open mind and see what unfolds..

I see the monster was a flop here and the go fiddle even worse so lets hope they have upped their game only one success in 5 years GPZ so fingers crossed for them :biggrin:

AJ


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Re: how many diff. friq. does fbs use at one time?
Posted by: amberjack
Date: October 07, 2017 02:46PM
Hey Del, keeping a low profile don't want to annoy too many people :blowup: there is a constant flow of monsters used a few times on to ebay so people buy try and sell , just a guess but they probably are not handling the ground to well as all VLF's will do here, its only a guess as not used one, but its pretty hot out there in most of the gold fields. in the air and on the ground well unless its winter then it can get real cold :lmfao:

minelab seem to be caught in some sort of limbo or twilight zone right now they are having a crisis of who they are and what they want to be, and just guessing that trying to keep everyone happy isn't working so well for them, and in the process are a bit lost in the transitional phase of moving to new minelab, no doubt there are some smart people there, but I think they are trying to hard...

just how I see it..

hope all is well.

AJ


Quote
D&P-OR
Hey AJ------Where you been in all this??----and---why was the monster a flop in oz?
Quote
amberjack
would make sense if what they have us believe, 25 ground cancel 3 for finding targets , and why FBS is good on silver/copper...

thinking the EQ is based off a xterra platform as FBS dosnt fit in a small box so just reading between the lines no proof, but it sure sounds like a 705 and about the same depth just hope they have fixed the coils as while the 705 can be an inch deeper than FBS its minelab coils are well bad, only run after market coils on 705 , granted their newer coils are getting better (FBS-CTX) so fingers crossed hey. :biggrin:

if it is based on the 705 it should be a good all-rounder if I was just looking to have one detector maybe this could be it, but then I have a lot of time on the ones I have do I want to waste all that time and trade down and learn again, not at this point but keep an open mind and see what unfolds..

I see the monster was a flop here and the go fiddle even worse so lets hope they have upped their game only one success in 5 years GPZ so fingers crossed for them :biggrin:

AJ


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