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using the correct noise cancel channel frequencies to gain that bit more depth

S

sovereign-fan

New member
here is a video that i put up on youtube about the minelab explorer noise cancel channel frequencies, it may interest a few of you explorer users...... i only showed how it increased the depth on a very small peace of lead but it also increased the depth on the larger objects as well. channel 1 is operating on a much higher kHz than channel 11 is. all of this in the video may be already knowing to most of you explorer users i don't know, but here is my video anyways.....

[video]http://www.youtube.com/watch?v=ysKeiEM_5Qo&list=UUnMSjsrjg4SCL43HXo2B_ig&index=1&feature=plcp[/video]
 
here in the UK if you are wanting to search for things like very small hammered coins, that kind of thing. channel (1) would be far better as it's operating on a higher kHz which is far better at finding the small objects but not as good on the larger objects.

with channel (11) it would be far better for searching for larger coins/relics etc as it's operating on a lower kHz which gives you far better depth on medium to larger objects, but not as good on smaller objects.
 
Thanks.
I thought I read somewhere that the higher the frequency responds better to silver as opposed to the lower frequency.
Which, if true, channel 1 would be better for large or small silver, right?

Lambo
 
There may be several reasons for what you observed. Was you in AM? You my have silent EMI. Thou high freq may be more sensitive to smaller items the problem is its affected more by minerals in the ground. Low freq deals with minerals better, but .... is affected by EMI. Take a look at this:

The 28 frequencies transmitted by the Explorer are all produced from one variable frequency oscillator, and all 28 are multiples or sub multiples of this oscillator frequency. When noise cancel is initiated, it steps the variable frequency oscillator through its range of 11 frequency steps (thus slightly changing all 28 frequencies by the same ratio). It records the received electrical noise at each step. At the end of this procedure, it selects the quietest frequency (ie the one that received the least noise). It also remembers this frequency when you switch the detector off and sets it to that particular frequency when you turn it back on again. The receiver is designed to properly receive the whole range of possible transmitted frequencies, so neither depth nor discrimination will be affected by which frequency the noise cancel circuit finally selects.

I dont disagree with what you found ive manually changed mine as well and it seems to work better in channel 6. Our problem is no one can tell us what these 28 freq/harmonics are randomly set at per channel. If we knew this we could better use this manual option. As it is now.... id let the machine do its thing since you can test it every 10 feet and you might get a different response especially if the machine is GB.

Dew
 
Curious about this myself bud.
 
Interesting video; Dew, do you often manually change your channel frequency to 6? I know your suggestion is to let the machine do its own thing since we can test it every 10 feet but still you say you find that it seems to work better in channel 6. I can't wait to test this in the field or my test garden to see how it reacts.

Don
 
Don we all know that no two detectors are created equal nor is it the same lets say in Ind. vs Fl. The channels do seem to have a pattern you can work with. Channel 5 is what my machine tends to want to set it at most of the time. Its my understanding there isnt that much difference in those random settings per channel. They remain fixed at a random separation .... but get moved slightly to compensate for EMI.

Dew
 
the only thing i noticed was that the signal on the nail was louder on channel 1 than it was on channel 11. the nail didn't seem to detected very deep on either channel, it looked to be the same depth.
 
I hunt 1 for gold and 6 for silver. If emi is a problem auto it.

Hh
 
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