I just received my K2 today, serial# 4998. I was wondering if the Kester solder I have, 244-6337-8800 which is a 245 NO CLEAN FLUX CORE SOLDER, ALLOY-63/37, .031' can be used to build the k2? You sure can Bob...245 is a no-clean type of solder that is just fine for using on electronic devices. 73, Joe W2KJ I QRP, therefore, I am