Lee, that is a sweet o'scope. I have the venerable Tektronix 466 analog, two-channel, storage scope like the one that I used in the Navy. It only goes to 100 Mhz, but I think that is good enough for my audio use. How are you set for probes?
It still takes some fiddling to get that Tek scope dialed in, some days I wish for a digital scope.
Because your o'scope is an educational model, there is a CD floating around that gives some excellent operational tips and other information. Tektronix may still have them or you can burn a copy from someone who has one.
Mark