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  1. Just to clarify, both Al and Marc had photos of...

    Just to clarify, both Al and Marc had photos of the keyset, same model. I'm primarily using Marc's photos.
  2. Yes, I am. It's one of my 3D model projects, I...

    Yes, I am. It's one of my 3D model projects, I started a notepad file of them when I got my 3D printer a few years ago. Whenever I think of something to model I jot it down on the list before I...
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    Wow, my Digitronics has exactly the same problem...

    Wow, my Digitronics has exactly the same problem as can be seen here, and not nearly as clean as yours is! The capstan cylinder (not the rubber) is 13.91mm dia and 43.3mm long. The rubber looks to be...
  4. Those fins look like they could be removed by...

    Those fins look like they could be removed by scoring at the base with a hobby knife (an Exacto #11 blade, the best hobby knife blade in the world) and then snapping off. with pliers. Use a dab of...
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    Chuck, I'm curious as to what your BASIC was...

    Chuck, I'm curious as to what your BASIC was marketed as, what was its name and any ads for it in trade magazines we can gawp at? I remember being really chuffed seeing our ad appear in Dr Dobbs...
  6. If the fins are internal structures that impinge...

    If the fins are internal structures that impinge on the larger tube, and the tube will make the machine operable again, I'd say it's absolutely fine and worth doing.
    After all, Marc, Mike, Ken and...
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    Here's what I would do. Don't stencil any labels...

    Here's what I would do. Don't stencil any labels on the PCB around the LEDs. Allow space along the sides/ends of the LEDs for threaded standoffs. Make the top of the standoffs level with the top face...
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    Here in Oz there was an S-100 machine kitted by...

    Here in Oz there was an S-100 machine kitted by Applied Technology who went on to produce the Microbee, arguably Australia's most famous/popular microcomputer. They did not want to spend the massive...
  9. That's not quite the full story and as that could...

    That's not quite the full story and as that could be interpreted as a 'took the chaff and left the wheat' statement, I will elaborate on what happened.

    In February/March 2016 there was a posting...
  10. As others have already said, this is a generic...

    As others have already said, this is a generic Apple ][ joystick. I had an identical one with my taiwanese 'Formosa' ][ clone back in the early 80s.
    You don't get to realise just how bad the cheap...
  11. FOXBORO Integrated Circuits Users Guide (TTL vendor cross-reference) 1973

    I've just uploaded the FOXBORO User's Guide from 1973 which has some details on how their part numbers correspond to other 74xx chip vendors to:
    ...
  12. Here is a curiosity I have. It's an S-100 SC/MP...

    Here is a curiosity I have. It's an S-100 SC/MP CPU board, a prototype I believe. It was made by Applied Technology (who later went on to make the Microbee) in Sydney, Oz, circa 1980-81. It was...
  13. I'll echo the sentiments about 3D printer...

    I'll echo the sentiments about 3D printer filament types already mentioned. PETG would be my choice as well, I have replaced ABS with it for most jobs.
    You could use a regular CAD program but then...
  14. I've spotted the electrostatic sheet on your...

    I've spotted the electrostatic sheet on your plotter/X-Y chart recorder is lifting and coming unstuck, same as what mine has done. Your photos are like those "Eye Spy" books that were all the rage a...
  15. Darn shame about not getting the boiler, but...

    Darn shame about not getting the boiler, but getting them certified is no trivial task anyway. As for identifying the chassis, it's got cast wheels so I'll take a wild guess it's a Model Engineer...
  16. I think I've spotted it... 3-1/2" gauge LNER...

    I think I've spotted it... 3-1/2" gauge LNER 2-2-4T. ?
  17. The earliest mention of the C language I can find...

    The earliest mention of the C language I can find in Dr Dobbs is a news release 22nd June 1978 which appears in issue #27, August 1978 titled "TINY-C INTERPRETER FOR THE 8080 and PDP-11" (see page...
  18. If you don't want to bend thin plywood around...

    If you don't want to bend thin plywood around corners or use a curved router bit on thicker panels, you might try making your rounded edges from quarter round mouldings, of course subtracting the...
  19. Thread: Overlooked?

    by 1944GPW
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    1,751

    The HP-65 was used on the 1975 Apollo-Soyuz...

    The HP-65 was used on the 1975 Apollo-Soyuz hookup https://www.hpmuseum.org/adverts/sa65spc.htm), so no argument over its ability and reliability there.
    I don't think it was overlooked during the...
  20. Sheet metal brake was discussed earlier in this...

    Sheet metal brake was discussed earlier in this thread. You can make your own (also discussed) but as the Old Engineer said the the Young Engineer "Why make what you can buy?".
    We live in an age of...
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    If you decide to acquire the DECwriter, ask them...

    If you decide to acquire the DECwriter, ask them whether any fanfold paper comes with it. That is getting harder and more expensive to find.
  22. (grabs steering wheel and wrenches (no pun...

    (grabs steering wheel and wrenches (no pun intended) thread back to the OP's situation)

    Lathes, mills, spanners, castings are all fine in their own right but the OP's question was about building...
  23. IBM System/38 FLD and other docs eBay Germany

    Docs, presumably System/38. Not mine, just passing it on https://www.ebay.de/itm/IBM-grosrechner-dokumentationen/184034547203
  24. If you are building a case from aluminium or thin...

    If you are building a case from aluminium or thin steel gauge sheet the nibbler as mentioned above is essential, as are a selection of files from large bastards to small rat tails.
    In addition a...
  25. I bought a Sun aluminium mouse pad off Oz eBay....

    I bought a Sun aluminium mouse pad off Oz eBay. The seller failed to pack it properly with cardboard in a thin box but instead just put it straight into an unpadded business envelope. And neglected...
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