Just to emphasize what has already been said, any good scanner that can receive in the 160 mhz range should work. As with any radio, the better the antenna, the better your reception; but your location in relation to the railroad you want to listen to makes a huge difference, too. If you're in a busy metropolitan area, there is probably more than you want to hear. If you're out in the country (unless near a busy main line) you probably won't hear much of anything. I carry a small portable scanner with me when I travel by train; but I know that some more rabid chasers have mobile setups in their car. Finding the particular frequency is pretty chancy, but there are many lists available, also as noted earlier. Good luck and have fun.