Hello Jim (& group) Thanks for great lesson taught! Part of my periodic station PM is periodically using Caig Labs Cramolin (C5) anti-oxident on all radio connections (DC-in, ground, RF out, etc.; with emphasis those I/O connections with low ( < 15 ma.) current flow.) I had never put fuses or fuse holders on this list--until your posting--but will now! 73, Blair k3yd