>FYI ><http://pcbunn.cithep.caltech.edu/jjb/Hammarlund/if_alignment.htm> > >Found this site that explains the basics of sweep alignment for a Hammarlund >rcvr. Note that nowhere does he say to turn off the AGC or clamp the AGC line. If this isn't done the results will be skewed by AGC action. 73 Bob WA2UEH