[Radioroslyn]

Well 1st off it's not Litz wire. It's just plain old 38G cotton covered stuff. There an interaction between that little clear strip and the copper that causes it to rot. Litz wire is made up from using several strands from very fine wire like 7-41 would be 7 strands of 41G wire.
Terry
ps Your very welcome enjoy doing it. It's kinda like fixing a radio with out doing the work! If it give you any trouble you know where to find me.