The one guy thinks the voltage and current columns are reversed and I might agree with that. Using https://www.wolframalpha.com/input/?...2B46 )%3D15.4

it might suggest the reference is between -1 and -1.2 and a 1% resistor is 15K. There might be a resistor in parallel with the tip setting resistor.

So, the above is a guess for a starting point using a few values from this http://www.nerdipedia.com/tiki-index...ucture=inde x table.