09-12-2013, 10:41 PM
I keep a piece of 220-320 sandpaper handy and rub and "roll" the tip on it and "tin" it with new solder before touching the old solder (or at least the stubborn blobs that won't melt). Works everytime for me. Did a complete recap and resistor change on a '39 RCA Victor, then a complete rewire, recap, and resistor changeout on the '42-400 with the same tip, and a cheesy iron! No prob!