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.

I bought this on eBay knowing it was dead. The front panel lit up just fine, but no display. I took off the covers and checked the voltages. All were good, except for the +5VDC, which had 2.5V ripple on it! I knew it needed new filter caps, but I didn’t have the time to take it all apart and put it all together again in one sitting. Otherwise it would have been a basket case. I sold it at yesterday’s Ham Radio Outlet parking lot Hamfest to a nice ham who has another 465 and wanted mine for parts.

Here’s a very large pdf 291 page service manual for the 465: https://www.dropbox.com/s/7db94tfqk3itqxf/465.pdf?dl=0

Here’s a 50 page manual in pdf: https://www.dropbox.com/s/qa3wnog651vun3g/465_v6.pdf?dl=0

Here’s a helpful guide to replacing the filter caps in the 465: https://www.dropbox.com/s/fwfoygiu2fxr0r4/Tek%20465%20Power%20Supply%20Capacitor%20Replacement%20Guide.pdf?dl=0

Here’s a manual in djvu format for the 465B version: https://www.dropbox.com/s/g1obgoyhqvx40vt/465b.djvu?dl=0

Let me know if you have any stories about the 465 family of oscilloscopes.

This was my former apprentice Jordan’s scope that I got in the package deal when he left town for greener pastures. The 453 is a nice portable scope, and this one is in good working order. It’s missing a foot on the bottom, and the rear stilts are in bad shape, with 2 of them being bolts, but they still do the job. I had a hardcopy manual in my library before I got the scope.

Here’s a link to the service manual: https://www.dropbox.com/s/pm011s8h93ca10u/tek%20453.pdf?dl=0

Let me know if you have any stories about the 453 Oscilloscope, or if you would like to purchase mine at a reasonable offer.

I got this Type 180A Time-Mark Generator in my first batch of Tektronix stuff that I bought from an old retired engineer in town. This one is Serial Number 5733. Here’s a link to the djvu manual: https://www.dropbox.com/s/8aoo0znnlzfuwmt/180a.djvu?dl=0

Let me know if you have any stories about this 180A Time-Mark Generator, or if you are interested in purchasing mine for a reasonable offer.

This Tektronix T932A sn B022605 was given to me by a friend named Tom who used it in his job calibrating electric motors, I think. It has some scratchy pots that make the trace on Channel A jump around, but is otherwise very functional. There is a Z-axis connector on the rear. I have a hardcopy manual in my library.

Here’s a link to a pdf manual for the T932A and T935A oscilloscopes: https://www.dropbox.com/s/cijlbd4ca0c6w0f/Tek%20T932-T935.pdf?dl=0

Let me know if you have any stories about the T932A Oscilloscope, or if you want to purchase mine at a reasonable offer.

This Tektronix 7704A sn 102137 was my shop workhorse for a few years. Last year I plugged it in and fired it up, and a cloud of white smoke poured out of the vents on the rear side. I took it apart and couldn’t find any visual evidence of the damage. I think it was a filter cap in the PSU that went to Dead Cap Heaven. I was astonished that the power supply was so small. I never got around to actually attempting a fix yet. This mainframe scope has 4 slots for plugins. The upper and lower halves both have the same serial number.

The Users Manual link is: https://www.dropbox.com/s/ighextucke20jt1/Tek7704A-op.pdf?dl=0

The Service Manual is very large, and its link is: https://www.dropbox.com/s/gmsgmhs6jn4jsig/tek-7704a.pdf?dl=0

Let me know if you have any stories about the Tektronix 7704A Oscilloscope System, or are interested in buying mine at a reasonable offer.