Yep, the '450 is a good little RTTY radio. I have 2 of 'em here and one has a 250 Inrad and the other a 400 cycle Inrad. Works good. 73 Tom W7WHY No problem Don, I put a nice set of 400hz INRAD filters into the TS-450's IF and got a microKeyer-2 to do real FSK. The 450 is now dedicated to RTTY http://www.ve3vid.webs.com/