Here are some URLS for the K1 sideband mod. Thread (tnx ve3mcf): http://www.qsl.net/ve3mcf/elecraft_reflect/K1_Mod_SSB_Reception.txt Giuliano's K1 web page: http://it.geocities.com/giulianoi0cg/k1_page.html K1 SSB mod PDF: http://it.geocities.com/giulianoi0cg/k1ssbmod_ed2.pdf I haven't done this mod. 73 Ken K3VV Coopersburg, PA