I am looking for a K1 for the SR-150. K1 is a 4PDT 110VDC relay. I am searching for an original first before I adapt a modern type. Best Regards, Walt Cates, WD0GOF, http://www.myhamshack.com/WD0GOF/<http://www.myhamshack.com/WD0GOF/> Only when you take full responsibility for where you are in life will you be able to find peace and joy in life.