Hi John, I used a TS120 when I took a lightning strike and power surge on my TS520. I agree it is a nice little radio. I don't remember how to use it on CW but it didn't have a CW filter in it but the I-F shift made it so tight that I could use it in place of a filter. Good luck with that one. Walt WA4QXT New London CT [log in to unmask]