The thermocouple voltage for Cu/Pb-Sn is given as 0.3uV/K but Antimony 
is a component of the new 'leadless' solder. Antimony/Copper 
thermocouples were among the first to be used in the 19th century. What 
is the thermocouple potential of Cu/Sb ? I'd say huge ? Sb has over 10 
times the thermoelectric potential of either lead or copper, with the 
Cu/Sb being able to produce 10 times the error voltage in a Cu/Pb-Sn 
soldered joint.

Peter
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