Doug I would recommend a 100 MHz scope. I have an old Philips one that is great for HF and 50 MHz use. I'm not sure about books to describe how to use a scope, there isn't much to using one and there's plenty of information on the web, see http://www.doctronics.co.uk/scope.htm as an example. 73 Dave, G4AON K2 #1892, K1 #1154