Richard, I have had a 420 and now have a 240/320, and they both worked great on 20, and had some directionality and probably gain on 40 (e.g., 280 DXCC on that band), so overall the 420/240 should be very good. My 420 was a killer antenna, and the 320 is almost as good, with a slightly wider beamwidth. 73 and GL, andy, ae6y