Thanks for the comments here, some useful information. I've started learning Morse a couple of weeks ago. We've been told firmly not to use a key until we can copy reliably at a decent speed. We started with A two lessons ago, and our teacher just added a letter each time we'd got comfortable with the previous ones. I've been practising using a web site which plays out Morse from text you give it, and once I've got proficient up to Z I'm planning to listen to some of the live feeds like the CNN news one. I don't have a radio at home yet, but I've ordered a Pixie kit, to see if I can listen in on some CW.