I'm not sure who came up with the method of using Spectrograph to align the SSB/CW filters, but I must say it is easy and gives great results. Just finished setting up and aligning K2 #2563- first SSB QSO was on 20M with LZ2KV! I answered his CQ and he came right back, with a report of "good audio". Setting up the SSB filters by ear wasn't quite as successful, but Spectrograph makes it easy. Dennis NB1B