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Title: GHOST SIGNALS Post by: DIGGA on June 26, 2009, 10:58:11 PM IT MAY SOUND LIKE A STUPID QUESTION BUT WHAT ACTUALLY CAUSES GHOST SIGNALS ??? ??? ??? I USED TO FIND THAT I WOULD GET A GREAT SIGNAL WITH MY OLD MACHINE ,,,,, DIG IT AND IT WOULD TOTALLY VANISH LIKE A FART IN A TORNADO ??? ???
IS IT MINERALISATION IN THE GROUND AND IF SO WHY IS IT ONLY IN CERTAIN PLACES ??? ??? MY NEW MACHINE DOSENT SEEM TO DO IT NOW AS IT HAS A GOOD DISCRIM ON IT BUT IT HAS BEEN PUZZLING ME FOR A WHILE NOW Title: Re: GHOST SIGNALS Post by: viking on June 26, 2009, 11:05:03 PM it could be a 1 way signal or after u disturb the dig the coin could be on an uprite position ... sometimes if u loose the signal after u dig it up just use your pinpoint its worked for me digga ;D
Title: Re: GHOST SIGNALS Post by: Tafflaff (Rob) on June 26, 2009, 11:06:32 PM What I find is that with big iron - Deep , it can trick your machine into thinking its a good signal, as soon as you dig some earth off the top it clears enough to recognise its actually Iron and Discrims it out.
Title: Re: GHOST SIGNALS Post by: cardiff bats (Paul) on June 27, 2009, 07:59:17 AM I had the same last week ....really good signal , started to dig down and pulled out the biggest piece of iron plough i have ever seen :D
Title: Re: GHOST SIGNALS Post by: Jeb on June 27, 2009, 11:40:12 AM Having discrimination on any detector doesn`t erradicate ghost signals whatsoever.
in fact you will find that in all metal where you do not get any discrimination involved, you will not get ghost signals at all, and you`ll actually get a better clearer target response signal received. Ghost signals are caused by over use of gain, and /or a lot of mineralization ground effect bombarding your detectors response signals . You do not get mineralization effect in all metal,only when you use the Discrim mode/s. High Gain or otherwise known as Sensetivity is more often than not the main cause. if you do encounter ghost signals, try lowering your sensetivity gradually till the Ghosting stops. I hope this is of some help to you . Title: Re: GHOST SIGNALS Post by: DIGGA on June 27, 2009, 11:51:11 AM AHHHH OK AND THANKS FOR ALL THE HELP FOLKS ;D ;D
Title: Re: GHOST SIGNALS Post by: Malcolm.mtts on June 27, 2009, 04:22:47 PM Did you have a ghost signal or could it be a genuine signal you could not find?
On the last Highbridge rally I came across a detector digging a large hole and shaking his head in disbelief. He said he had a cracking signal but as soon as he dug a hole it disappeared so he thought it may have pushed the coin or whatever it was onto its side. He was now using his probe and getting no signal any more so he suggested it must have been a ghost signal. His spade was stuck in the ground behind him. I suggested he get the spade and check to see if there was anything stuck to it... lo and behold... a tube was stuck to his spade. So .. some ghost signals are not actually ghost signals.. they could be a genuine signal but lost because because the coin or whatever could now be stuck to the spade itself and not in the hole you just dug. |