When good signals go missing?

[Anonymous]

Today out detecting I had a very good signal top right hand on display and 31 on digital. The signal was loud and clear and sharp on first three or four passes (the crosshair held its position and the digital reading remained at 31 on all passes) but then the signal dissapered with just a nulling of threshold. Should I have dug this signal or was I right in thinking it was junk? Usually lumps of iron even the ones close to the surface dont give off such a good signal and sitting here now I wished I had dug it. anyone got any thoughts please?

 

[Anonymous]

Post months ago in which he discussed how the Explorer could temporarily create a field that would effectively blind the Explorer. Hopefully he can pass that information on again...
Anyhow, my money is on a big, frisky chunk of iron that just overloaded the Explorer. After a couple of seconds of getting overloaded, perhaps the semi-auto sensativity backed you off and you finally got a good ID on the iron.
If it happens again, switch over it iron mask -16 and have a look around. It is a lot easier to figure out what is happening under the coil when you disable the discrimination for a few seconds.
Tim

 

[Anonymous]

Ocassionaly it will be a clad quarter on or very near the surface. But it usually is a flattened coke can or a sprinkler head. However if it dissapered I'd bet on iron. It sometimes takes a couple passes over rusty iron for the computer to sort it out. At any rate if it was loud and didn't lock on, forget it.

 

[Anonymous]

ITs generally iron when this happens, however it might happen to a coin close to iron, the way I understand it targets get saturated with eddy currents from the transmitted frequencies and thats what gets read back by the receiving circuitry.. On a large piece of iron they initial eddy curent are low enough to register but the longer you saturate the target by waving the coil over it, it gets oversaturated and the signals are strong enough for the wexplorer to read the correct ID, It explains why you can work up a faint signal to a good strong one sometimes by wiggling the coil over the target.. in the case of a coin close to iron the iron might over ride the target if you check it out too long and you lose the target from all directions.. The thing to remember is if its reading good for any amount of time without that iron ping it might be worth a quick plug and check with the X1 probe just to be sure.. If your signal was soild 31 then it was more than likely just iron

 

[Anonymous]

Many thanks Jim