There is an easy explanation:
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Ha! we have one of those old cathode ray O-scopes in our “museum” here at the university. serial number 123. one of the founders of tektronix went to school here and gave us lots of stuff.
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Ha ha! More than less of us can relate to that easily! 
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How old is that scope? In my youth I played with one where the analog was, er, more analog than usual. Every time I thought I was measuring a really interesting waveform, no, it was the scope. (Of course, that can be fun too, in a different way.)
I had one very similar to that collecting dust in the basement for years. I finally sold it at a yard sale a few years ago on the assumption that, if I really needed regular access to an o’scope, I could pick up a new one that would take up 1/10th of the space and be more accurate.
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Sound card O’scopes are great fun but seriously lack freq response. For a few dollars more you can build a USB one with good freq response.
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Or this: http://makezine.com/2016/09/21/espoteks-labrador-packs-5-lab-instruments-onto-single-board/
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still waiting for this to come out!
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That O-scope is looking like it’s been around since before we walked on the Moon. How old is it?
It looks like it is in pretty good shape though.
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Here is the picture the Restore posted. It’s a Tektronix 551 Dual Beam, introduced in 1958.
Edit: I changed it to an actual link, it kept making it a picture.
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I picked one of these USB units a couple years back for my limited skills and needs.
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That’s just amazing! It looks like it is still working.
It’s nice to see that old technology can last a lifetime and still be somewhat useful. Someday, I’ll probably buy an o-scope to refresh my latent electronics skills and build some things that have already been invented.
@dan what is the probability range for a December delivery?
what are the biggest 3 legitimate threats to the December delivery?
There’s always a host of gremlins waiting in the wings, and I’m not going to speculate if any will rear their heads.
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Hmm…Hollywood needs ideas, how about a remake of Beetlejuice starring Johnny Depp. Beetlejuice is square in his round hole of method acting.
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I do believe that they are making a new Beetlejuice movie… so, careful what you wish for.
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As long as Beetlejuice is still Michael Keaton (which he apparently will be), I’m ok with that.
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