Northeast said:Good link here Fossiker.
https://www.detectorprospector.com/forums/topic/5267-iron-bias-what-it-is/
In heavy iron I would be more inclined to increase recovery speed to improve separation rather than use Iron Bias. And to be honest I have never adjusted Iron Bias from factory as I wonder if it will result in missed non-ferrous targets. This is backed up by nothing more than me guessing!
If raising Iron Bias just means that large pieces of iron that can often present with a non ferrous tone also are more inclined to just sound off as ferrous then I am happy to leave it at default. Digging the odd axe head or pick head or large slab of steel isn't that much of an issue for me and sometimes they are a nice item.
Cheers, N.E.
Dave79 said:Try field mode 2 with factory settings if you want to see what effect reduced iron bias has. I've found that even a large rusty square nail will give a 15-16 TID in this mode. I have set iron bias to 6 across all modes on mine and as northeast said, increase recovery speed in trashy areas cos the iron will still mask good signals with recovery speed low, even if it's not giving off high tones. Swing around the area in all metal mode to see how much iron junk is in the ground.
Dave79 said:I have set iron bias to 6 across all modes on mine
Dave79 said:Yeah, it's probably on the high side but most of the places I detect are old prospectors huts and settlements made from the plentiful timber in Tassie so if you're going to dig square nails you won't cover much ground in a day. The ground is also quite mineralized and if you drop iron bias below 3 you will dig up an awful lot of red rocks :awful:
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