A
Anonymous
Guest
between a pulltab and a gold ring or coin?
This may have been asked before, but if here in New Zealand a 10c coin and a new pulltab both have a VDI of around 20. and of course gold rings could have hte same VDI?
So my question is : is there a trick to tell the difference? Aluminium and gold are very close on the conductivity scale. Cant reject the pulltab - too much risk of losing gold / coins. But the pulltab DOES have a different shape etc to a coin - not symmetrical.
Are there any tricks - ie heel /toe technique? all metal mode shape profiling? using coil at angle?
Surely there must be a way , or is it just DIG and find out??
thanks
JOhn
This may have been asked before, but if here in New Zealand a 10c coin and a new pulltab both have a VDI of around 20. and of course gold rings could have hte same VDI?
So my question is : is there a trick to tell the difference? Aluminium and gold are very close on the conductivity scale. Cant reject the pulltab - too much risk of losing gold / coins. But the pulltab DOES have a different shape etc to a coin - not symmetrical.
Are there any tricks - ie heel /toe technique? all metal mode shape profiling? using coil at angle?
Surely there must be a way , or is it just DIG and find out??
thanks
JOhn