Test Equipment: Oscillocopes

[TinselKoala]

Uhh..... no.

See the attachments below.

And also this document:
http://www.ece.vt.edu/cel/docs/TekProbeCircuits.pdf

If you insist on making your own, you might as well use the much cheaper RG174/U, I guarantee you will not be able to detect the difference between that and RG316/U on your oscilloscope, except that the 174 will be more flexible and easier to handle.

However... whatever floats your boat.

If I were you, though... I'd concentrate my efforts on troubleshooting and repairing and restoring the oscilloscope, using the probes you have already ordered to learn how to use it properly on various projects, and start saving money to buy your _next_ oscilloscope, or a more modern Function Generator with more waveform output choices. A good dual tracking powersupply is also an important investment for your electronics workbench.

[Brian516]

Yeah, true.

I tend to get a little ahead of myself sometimes.

Thanks for the info.  I'm still working on cleaning this thing up and running some deoxit D5 into the pots and switches to clean out the contacts. Most of them caused the trace to "scratch around" a bit so I might as well do it while I have it open, and then I'm going to make sure I clean off any excess cleaner, hard to reach dust, etc with this CRC QD electronic cleaner that I picked up. Hopefully all works out well.  Then I can focus on learning how to use it....

[Brian516]

well, now my scope has a new problem.
I think I may have managed to resolve most of the "noise" issues with the pots and switches, but now I've awoken a whole new problem.
GREAT.
I wish I could just go buy a brand new scope... I get the feeling I may never get this one working properly, especially since I don't have the testing equipment that the manual states is needed, and have absolutely no experience when it comes to diagnosing or fixing this complex of an electronic device.

https://www.youtube.com/watch?v=uOlpdG6qwpQ

I really hope someone has an idea about what is wrong with this thing.  At this point I wish I never would have even opened it up... or even got it for that matter....

Thanks for the help thus far, and any help you are able to provide me in solving these issues....

[TinselKoala]

well, now my scope has a new problem.
I think I may have managed to resolve most of the "noise" issues with the pots and switches, but now I've awoken a whole new problem.
GREAT.
I wish I could just go buy a brand new scope... I get the feeling I may never get this one working properly, especially since I don't have the testing equipment that the manual states is needed, and have absolutely no experience when it comes to diagnosing or fixing this complex of an electronic device.

https://www.youtube.com/watch?v=uOlpdG6qwpQ

I really hope someone has an idea about what is wrong with this thing.  At this point I wish I never would have even opened it up... or even got it for that matter....

Thanks for the help thus far, and any help you are able to provide me in solving these issues....

Don't get discouraged yet. When you can't get a beam at all, even with the Beam Finder,  that's when to get discouraged!

In the video it looks to me like you have the Timebase knobs set to "x-y" mode (all the way CCW.)  Is that right?

Please set the controls up like in the images below, and post a photo or new video of the traces you get.

Connect the CH 1 input to the calibrator. Just the center pin of the input jack to the calibrator bar, don't worry about a ground connection for now. I wouldn't even use a probe for this, just a cliplead from the cal bar to a wire stuck into the center pin of the CH1 input jack.

[TinselKoala]

@Brian: Did you get the full Service Manual? There is a Troubleshooting guide in there. I've found that these guides are very good and will help you track down the problem to the board or even the component level.

http://elektrotanya.com/tektronix_465_oscilloscope_full_sm.pdf/download.html

A good DMM is probably all you'll really need to check it out. The very first things to check will be the power supply voltages, according to the instructions in the SM.

I'm surprised that the thing has "deteriorated" since you brought it home. Are you sure you didn't knock something loose, or leave a screwdriver inside, or something like that?