I just wanted to report that the band-pass shapes of ea18 IFs B-D have changed drastically, we were wondering if it may have been anything to do with the power failure. Following is a graph of the band-pass for ea18 IFs A to D in dBs http://www.aoc.nrao.edu/~dsevilla/ea18IFsA_D_LBand1to2GHz.jpg David Sevilla