No keyer problems here ... You list enough problem items that I wonder if "something" isn't wrong with "somewhere". Maybe an antenna corrosion-caused "diode junction" creating the BC "garbage" ... and stray RF causing a keyer hick-up. Please keep us informed. 73! Ken Kopp - K0PP K3 #56 K2 #5665 ElecraftCovers at rfwave.net or k0pp at arrl.net