Hi folks, Spent the last couple of days putting the mods in ole K2/100 #279, and it was worth every bit of of work. Filter shapes are much improved on Spectrogram, but more importantly SSB just "sounds better". CW, down to 100hz shows little loss of audio (which had been a problem). So, I'm a happy camper....What's next? ....DSP? 73, Jay, W6JDB Madera, CA