Bill, In fact, here is my quote on the find in mine: "The module isolation found two cripsied resistors. Replaced same, recapped module. Popped fuse again, FINALLY tested tubes. One each 6AK6 in AF module shorted. Now back up and running just great!" Bob Bethman - N0DGN Manassas, VA (BC-610s are just better!) R-390A EAC '67, R-390A Collins '52, '52 BC-610I, BC-939B, and BC-614E