Arthur,
Depending on the types of fingers you can expect between 1- 3 grams per pound.
I sort my fingers into three grades: low, medium and high.
If the fingers are missing contact points they are low to medium grade.
If they have a large excess of board material on the edges they are low grade.
If they are fully plated and fingered, closely trimmed with no components they are medium to high grade.
If they are from slotted cpus, memory fingers or very old equipment and properly trimmed, they are high grade.
Standard fully fingered ISA and PCI fingers, properly trimmed are medium grade.
Yields
Low grade= less than or equal to 1 g per pound
Mid grade= greater than 1 g and less than or equal to 2.5 g per pound
High grade = greater than 2.5 g per pound.
Steve
