I have noticed that on some signals they are really banging out then when you check the clods over the top of the coil you hardly get a signal ? its happened on both the ctx,s so it seems normal anyone else noticed this ?
Mick
noticed the same thing today mick, did my head in!
sometimes throwing the target back in the hole because there was no responce!
seems to be when you put the tector on the floor and it aint moving?
anyway had three gold coins with mine since i bought it so well happy....
cheers steve
did the same thing bud ,no signal,no signal chuck back in hole re-check signal and its back in hole which is ok as long as we know whats happening ?Originally Posted by sam04
yeh would be nice to know why it does this?
maybe something todo with the auto tracking/groundbalance?
I noticed today some fuzzy signals and when i took a spit of soil out the signal came in clear n loud , i just changed the setting my settings on my SE
I had a couple of these as well! Good signal - dig, spoil heap and hole = no signal, refill hole = good signal again! still couldn't find it!!!!!!!!!!!!!
yes it get these but i find them 22 rimfire bullets tiny lead cut half had me big time there also small iron deos this a lot as it out off hole it discrims it put it back finds it again.
been detecting 20 years and can tell you its the detector, when laid on the floor stationary it occasionaly nulls out & wont even signal a viccy penny in the clod when waved over the coil!!
when trying to find your signal you can throw it , because it doe'snt make any sound !
very annoying, it doe'snt do it all the time but you can hear the threshold null when it does...
seems random & cant pin the reason down to anything..
steve..
if the threshold nulls its like i said iron trust me. prob it out.
i detect in all metal its not iron.
when the detector is laid down i can sit and listen to the threshold go on and off, one time it will signal the target a few seconds later it will not!
i have checked the ground and made sure its clean..
have read a thread on here about somebody not getting any depth with is detector laid down...
i am thinking its a possible problem with the wm10 unit( im on my second one first one went faulty)
will try next time directly plugged in
steve.
Hi Mick.
I too have noticed this and especialy on small lead and airgun pellets.The initial signal is great but once the soil is disturbed and the target removed its gone for a short while.
I allways persivere with it and find it after disturbing the soil for a few moments,but it can be a bloody pain trying to locate it again.
Incidently this use to happen with the Etrac too but not quite as much.
My own Theory on this phenomenon is that the Tiny items the Ctx and Etrac are very capable of finding due to the excellent sensitivity of these detectors coupled with the Hallo affect or conductivity of the soil around these very small targets allow,s these detectors to get good depth on very small items particulary in Pasture, and once the soil or clod is lifted and the soil fragments or that hallo or ball of conductive soil is disturbed the signal is then lost and has to refound for want of a better word.
Thats my theory.
I also believe it is the halo effect... I have the same process with the CTX and the GPX, especially things like copper and specific minerals that will give an ionic halo. The halo effect is most pronounced in salt environments.
......
I to have experienced something like this but found it was small bits of hot rock, might not be your problems though.
seems to be like a previous poster has said nulling out ? seems to happen when th machine is near horizontal ? the threshold goes and no matter what you wave in front there no signal if you reposition the coil to get the threshold back you then get the signal seems to be a problem somewhere that needs sorting ,as I said originally its done it on both the machines Ive had so seems like it could happen on all the CTXs ? anyone know how I can contact someone in the know at minelab ?
Your theory is correct, plus its done it with every tector iv had, I once posted a similar question about it and everybody said the same about disturbing the signal
I dont know if you think thats the problem Im having Mick cause its not ,you lay the tector down while you check the clods and if the threshold stays you get a signal if it goes with the same clod in your hand it doesnt register total silence ,nothing whatsoever to do with halo effects etc its the machine nulling out for some reason
i think i have the answer, minelab have made the ctx like that just so you go out and get the pro finder
I have one for sale if your interested ? bought on a whim at the weekend rally (got a discount after my problems with the CTX) used it on about 4 clods sunday so as new with battery £100 posted to UKi think i have the answer, minelab have made the ctx like that just so you go out and get the pro finder
thank you very much but unfortunately i already have one
Sovereign's, SE's, EXii, Etrac, all did, and do the same, on the beach with the sovereign elite you could dig the target, could be in 2 inches of sand in the pile and nothing.....pop it into auto sensitivity, and bingo, signal returns......
Back to an E-Trac
cheers for that I will try it when Im out at the weekend and let you know
Mick
If the ctx is auto tracking, chances are your tracking out the signal after the first few sweeps of the target
i dont think FBS or FBS2 detectors track the ground, they works differently..........or so i have been led to believe, so im probably wrong
If they aren't tracking the ground what are they tracking matey ?
Aeroplanes ?
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