Sinclair Calculator - Oxford 300

Discussion in 'Off-Topic' started by Robin Mitchell, Aug 27, 2016.

  1. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    Hi all,

    Just wanted to share with others here that I just got a Sinclair Calculator - Oxford 300 and its fully working with the original case!

    Anyone else here collect old vintage stuff?

    [​IMG]
     
    ErnieM and absf like this.
  2. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    Also this calculator is 41 years old! 1975 it was produced :O
     
  3. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    They don't built 'em like they used to...
     
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  4. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    @R!f@@ I said just those words to my dad today!
     
    R!f@@ likes this.
  5. OBW0549

    Well-Known Member

    Mar 2, 2015
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    I still have some ancient μA741 op amps. :D
     
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  6. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    @OBW0549 What pin package are they?
     
  7. OBW0549

    Well-Known Member

    Mar 2, 2015
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    I think they're in ceramic DIP-8.
     
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  8. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    Ceramic? The white type?
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
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    I still have my slide rule, it is in an enclosed case on the wall with "In case of Battery Failure, Break Glass"
    Max.
     
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  10. OBW0549

    Well-Known Member

    Mar 2, 2015
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    No, the dark grey type.
     
  11. wayneh

    Expert

    Sep 9, 2010
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    If you like old crap, you'd love to tour my basement.
     
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  12. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    @wayneh you call it crap, i call it a dream!
     
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  13. wayneh

    Expert

    Sep 9, 2010
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    I have an Apple IIe to sell, and samples of many later Macs. And a history of hard drives in enclosures, wires, cables, connectors, adapters and so on that were once highly coveted but now collect dust because it's too time-consuming to sell junk on e-bay.
     
  14. ci139

    Member

    Jul 11, 2016
    341
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    CCCP 0.5% ? was it a systematic error (it needs to be rewired for mΩ scale)
    there's still some use for
    Wheatstone bridge
    [​IMG]
    specs
     
  15. bertus

    Administrator

    Apr 5, 2008
    15,648
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    Hello,

    I also have some real old parts:

    old parts.jpg
    and some relays in transistor casing:

    relays.jpg

    Bertus
     
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  16. RichardO

    Well-Known Member

    May 4, 2013
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    absf likes this.
  17. jgessling

    Active Member

    Jul 31, 2009
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    All great stuff. I've got about two hundred calculators of that vintage. Used to pick them up for a couple bucks at Bay Area flea markets a while ago. Rarely seen now although I did see some TI thing about a month ago at a garage sale. Wanted $4 so I passed.

    Some highlights:
    - HP 35 working needs new battery pack
    - Canon desktop nixie tubes with delay line memory works
    - TI speak and spell several
    - Mattel horse racing calculator as seen on Pawn Stars

    Only thing I ever sold was a set of boards for Heathkit H8 system. Selling seem like a good idea until you actually do it.

    And since I got this far, My great regret. Rainy winter day at Concord flea market, very few people around, a guy had a Heathkit analog computer EC1, $20. Well above my $5 maximum. I had the money. Went home after looking at his van carefully in case I might see him another time.

    That thing would have been worth about $1000 at that time. Looked for that van at local markets for months. Never saw it.

    Oh, well such is life. Still got lots of fun out of it all.
     
  18. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,043
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    1977 MC6800L ceramic & gold


    image.jpg
     
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  19. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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  20. atferrari

    AAC Fanatic!

    Jan 6, 2004
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    Heard of them many times but never seen a picture before. Battery powered only or there was the chance of using an adaptor?

    Reminds me my first CASIO I bought at Singapore when calling for bunkering ca 1972 (?)

    With the vessel at the anchor, we had little or no chance to go ashore so the solution was buying to the people coming on board who brought bundles of things (basically consumer electronics) and installed themselves on main deck around the accommodation. Small market where every "boot" had some 3x3 m space. Bargaining was the game that everybody played to the satisfaction of both parts.

    I doubt that given the changes in their policy at all levels is that happening anymore. Much less the girls that also use to came on board to offer other things, not electronics related, precisely.
     
    Last edited: Aug 28, 2016
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