I bought a Tektronix 475 specifically because I wanted to do oscilloscope music on a real analog scope. Unfortunately, "works as it should" on the eBay ad really meant "Doesn't blow up when plugged in", and I haven't been able to fix the thing yet. But this gives me the inspiration to try fixing it again.

Hey Dan, Yeah I have to do a lot of soul searching before I hit the final key for a Ebay transaction but my scope from there worked out well. I am also trying to convert a old portable TV but the image is scrambled a bit no matter how I hook up the yoke coils. At least no smoke on that project yet ;-) I think I will go ahead and order the files the authors used on Blender and see what I can come up with. Would be awesome if I could get my Light Logic to output a picture ;-)

I think your Tektronics 475 should do nicely.  Hopefully you will get up and running soon and have a bit of fun :-)

Tektronix, sorry ;-)