Is it possible to set the kHz setting on E-Trac machines? Is it related to 'sensivity' or 'noice cancel'? I ask in regards to hunting for jewelery/gold. TIA and HH!
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As usual..."YOU DA MAN"! Thanks again.full band spectrum....fbs.......nope......some say that the lower noise cancel channels are better for silver......higher channels are better for jewelry......I do not know.
Too much silver/copper out there and I live where the nearest beach is a state away....and I don't like the pull tabs, can slaw....foil....I have enough of them and don't need more of it.
Test all the rings you have ...use the threshold pitch and in tone id adjust the no. of tones , sounds, variability and limits to get a best for you to hear sound...
For ladies 10k , I just load up the minelab coins factory mode and dig all the low tones....That is what I usually find at swimming places ...for sports fields lock in the mens bands id....
2 to 13 co pattern for ladies 10 k and I got six rings at one swimming pond.....I looked for a mans wedding band and found it at a 20-21 co id....finally after a couple of handful of pull tabs.
Make your own pattern for certain rings you are after...ladies or mens... to hunt both you would have an open screen to drive you nuts, But...it can be trained in this manner to work for jewelry.
Soooo...have we concluded that 'higher' kHz signal = improved ID on lower conductive metal, i.e., 'gold' and 'lower' kHz = improved ID on higher conductive metal (copper/silver)?? AND...have we actually determined that a lower 'noise cancel' channel (1, 2, 3 etc.) = lower kHz?? OR...do these ONLY have an impact on 'small' gold, i.e., flakes and specs of gold nuggets detected by GOLD detectors? It could be that ONLY Minelab engineers "KNOW FOR SURE".and some more info from the internet...I guess it is what works for you ???????
I read a year ago something simular, but just the opposite, low number noise cancel was equal to lower frequencies on the Etrac, but in this video low noise cancel numbers were the higher frequency with the Explorer.
On noise cancel 1 there’s a burst of pulses every 0.72ms (1.39KHz) and each pulse has a rate of 45 us (22.2KHz)
On noise cancel 11 there’s a burst of pulses every 0.6ms (1.67KHz) and each pulse has a rate of 36 us (27.78KHz)
I measured the channel 6 frequency of the short pulse train, and indeed it's at 25KHz.
Not arguing...but the concept (low kHz vs high kHz) may be a "proprietary" issue and therefore not discussed in the Owner's Manual. I believe it IS a fact that "Gold" detectors operate using a very high kHz electro magnetic signal...but do so in order to detect very small gold flakes, etc. I am also 'relatively sure' each channel employed by E-Trac's Noise Cancel feature a different kHz. Again, I'm confident the exact kHz value is proprietary. One thing for sure...as you change the NC channels, the screens VDI values (FE - CO) will change (up/down) slightly as well. Oh well...I didn't major in electrical engineering or metallurgy either. I do know/admit...my E-Trac is smarter than its operator!! It's time for another HH and keep on digging!All I can say is none of this is supported in the operating manual.
Page 31, Noise Cancel looks for a channel to minimize interference to the machine. So it smooths the operation of the machine, it doesn't say for silver hunting run low Noise numbers and for gold run high Noise numbers.
Sensitivity is looking at the magnetic interference in the ground, page 54.
FBS Page 5, The FBS circuit automatically transmits multiple frequencies simultaneously.
All this is interesting but I think we are trying to make the machine do something that it will not do.
Ron in WV