Wooaaahhh, be careful with airscapes advice. Because it appears that he is not aware that the "viking 5" is only an all-metal TR machine . There is no discrimination on there. Not via tone, and not via ascending/descending knob, and not via a screen. No TID, and no disc. So there is not really any "one sound" for "pulltabs", that you can simply ignore on the next signal. All signals, from foil, on up to silver dollar, will sound the same (assuming commensurate size). The advantages of an all-metal TR, is it will be great at seeing through and around iron nails. Contrast to discriminator machines, and there's a risk of masking. But iron nails is the ONLY type trash you can eliminate. All other conductors will sound off. That Viking 5 is more for spots like where a house burned down (hence hundreds of nails), or under porches, or ghost-townsy like nail-riddled sites. Otherwise: it's not too deep-seeking, isn't too good in mineralized ground, has no other form of disc, etc... So if your hunt locations are wide-open fields, you're probably better off to get you a better machine. Then yes, you can eliminate pulltabs IF YOU SO DESIRE (but be aware, that you might miss gold rings or odd-ball mid-conductor coins of some sort, etc...). Another alternative: You might also pick a different field. Because if you say your field is "filled with cans and tabs", that doesn't sound right for fields-of-england. There must've been some sort of modern activity that went on there. Thus try other fields. Because a buddy of mine who did a trip to England, and "dug all" (except iron), said he'd go for HOURS without finding tabs or modern junk. So as you can see, fields vary depending on usage, history, etc...
