I bought this 485 scope from a fellow in El Cajon as my working daily-driver. And it worked great for years, until I left it on over the weekend and came back to find the fuse blown. And it blew the next fuse. I didn’t take it apart to diagnose it, because I had another scope to use. It is in great shape otherwise. Someone replaced the rear stilts with short machine bolts, so there’s no support back there.

Here’s a link to a 191 page djvu manual: https://www.dropbox.com/s/5zcqt9vv7vx4bnf/tek%20485.djvu?dl=0

Here’s a link to a very large 193 page pdf manual: https://www.dropbox.com/s/amrvvj0541yefmj/tek-485.pdf?dl=0

Let me know if you have any stories about the Tektronix 485 Oscilloscope, or if you would like to purchase mine at a reasonable offer.