I have a Monroe 620 Calculator that I bought a long time ago, intending
at the time to use its Nixie tubes for some other project, and I am now
questioning the wisdom of that train of thought.
It's got 13 tubes in it, I think all of them work. According to Rick
Bensene, they are "JPC B-5755's (clones of Burroughs parts of the same
part number)". But now it has some sentimental value to me as a unit
which might outweigh the value to me of the individual tubes.
Is there any collected wisdom about the scrapping out of non-prime
systems for their tubes? I've got a moderately-sized stash of ZM1000's
out of things with no sentimental value that will keep me going for a
little while, but those 13 additional tubes still have some possibilities.
For reference, here is a link to Rick Bensene's Monroe 620 info:
http://oldcalculatormuseum.com/monroe620.html
What is good/sentimental about my particular unit?
- I bought it from Ed at The Black Hole on a very memorable visit, and
that experience (sadly) can never be repeated.
- It has the way-cool-provenance property sticker of "LASL-AEC" on it
What is not so good about this unit?
- It doesn't work reliably. This could probably be fixed.
- It's missing the decimal place knob.
- Some of the top vent holes have been bashed and a few of the
plastic strips are broken.
- Ed wrote "$5" on the top of it with black magic marker
Thanks for any advice or wisdom,
Dan M.
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