John (AB8O) wrote ... I am trying to [resuscitate] my K2 after some problems with K60XV. Where exactly do I place jumpers on J1 and J2 of Control Board? Hi John, Glad to hear that your K2 is coming back to life. See http://www.unpcbs.com/faq/#diagram for the answer to your question and a whole lot more. Gary, KI4GGX K2 #4067