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Weird plumbing problem

Discussion in 'Fred's House of Pancakes' started by qbee42, Apr 10, 2009.

  1. jayman

    jayman Senior Member

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    For some reason, I just can't picture you in fatigues, carrying a 16. Really, I can't
     
  2. FL_Prius_Driver

    FL_Prius_Driver Senior Member

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    Beginning in the late 80's, all the major IC makers abandoned the rad-hard and rad-tolerant IC market. It was left to small scale, dedicated foundries (e.g. Honeywell, Hughes, etc.) to provide the Silicon-On-Saphire and other materials for satellite and niche markets. Intel was the first to leave and then once TI left, most military electronic specifications no longer required anything in the way of rad capable requirements.
     
  3. hobbit

    hobbit Senior Member

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    My parents in FL had a problem with pinholing in piping under
    the concrete slab, as they build almost all the houses down there.
    Under-slab leaks are rampant, in fact, especially around certain
    vintages [relatively recent] of construction, where they probably
    started cheaping out and using L grade pipe instead of M [or
    maybe I have that backwards]. Anyway, the fix was to chop it
    all off short and redo everything with PEX through the attic.
    .
    Having just recently tooled up a little to do small copper jobs,
    I'm loath to go the PEX route yet especially with the crimp tools
    being priced as they are. Fortunately my own neighborhood seems
    to have a lot of iron in the water but relatively few corrosion-
    causing minerals. It just discolors the toilet bowl fairly fast.
    .
    _H*
     
  4. qbee42

    qbee42 My other car is a boat

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    There is a reason that you can't picture that. I did say *draft* card.

    Tom
     
  5. jayman

    jayman Senior Member

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    Having involvement in certain projects, I will say that tactical, mission-critical systems still have the requirement. Eg fly-by-wire absolutely requires it

    There are specialized manufacturers

    http://www.mskennedy.com/client_images/catalog19680/pages/files/MSK106RHTotalDoseTestReportrb.pdf

    that not only make a line of rad-hard components, but provide TID reports up to MIL-STD-883
     
  6. jayman

    jayman Senior Member

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    Just curious, are you going to use the reliable but illegal 50/50 solder, eg have some ratholed away? The illegal solder works *much* more reliably than the new stuff

    I know what you mean about the price of the tools. I paid around $200 for the kit, the head can take 1/2 and 3/4 dies which is the only size I'd be fooling with

    As I'm sure you're aware, an "iron filter" solves one problem but tends to introduce another problem, especially the potassium permanganate
     
  7. FL_Prius_Driver

    FL_Prius_Driver Senior Member

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    Couple of finer points:
    1) Yes, certain projects do require it, that's why I said most.
    2) Those that do require it are limited to processing capabilities of two decades ago. The F-22 flight control system is at a i386 level of processing. The software compilers used are ancient. Good enough to work, but very difficult to recruit young software engineers to stick with, since they see it being unmarketable outside of that (shrinking) area.
     
  8. jayman

    jayman Senior Member

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    I agree, part of the problem is that extremely high density IC's have a long way to go before they can deal with the TID's that one can expect from either HAEMP or very close nuclear detonations

    eg prompt ionizing radiation will reliably introduce latchup in even "certified" systems. Hot restart groups can deal with that, if they are properly programmed/sequenced

    There are obvious limitations to overall system capability for an airbourne system vs a land system. Eg C3I systems will usually be COTS, but protected by enclosures, even entire rooms, with special design to resist HAEMP.

    It sounds like we have worked on similar projects and systems

    If you're referring to the compiler I'm thinking of, I wouldnt exactly label it as "ancient." Not fancy to be sure, very little application on the civillian side, especially the entertainment industry

    I often hear the frustrations you mention from the younger folks. Not sure what they're moaning about, I've been doing this sort of work since the mid 80's and always seem to drift back into it.
     
  9. qbee42

    qbee42 My other car is a boat

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    I remember one of my programmers telling someone that he was "a dinosaur in training."

    Tom
     
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  10. jayman

    jayman Senior Member

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    Well, sure. If you don't keep up with the technology, after 2 years you're automatically "ancient" anyway
     
  11. kenoarto

    kenoarto Senior Member

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    duct tape and rubber bands are the bestest fixes
     
  12. jayman

    jayman Senior Member

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    That is SO true

    Main Menu

    especially the part "if women don't find you handsome, they should at least find you handy"
     
  13. jayman

    jayman Senior Member

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    One of my favorite Red Green clips was the Poor Mans Power Window Conversion



    Just the ticket, I pull up in an old used up rusted out s***box Dodge van, pop the mixer onto the protruding stud, and zzzzzzzp
     
  14. jayman

    jayman Senior Member

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    I somehow picture Tom's first car being just like this one



    I know mine was pretty much like that, duct tape and all
     
  15. hobbit

    hobbit Senior Member

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    Okay, I've now been indoctrinated into awareness of the Red
    Green show.
    .
    Yeehaw...
    .
    _H*
     
  16. qbee42

    qbee42 My other car is a boat

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    Keep your stick on the ice.

    Tom
     
  17. jayman

    jayman Senior Member

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    And here you thought there were no hillbillies in Canada.

    Silly boy ...
     
  18. qbee42

    qbee42 My other car is a boat

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    Somehow Canadian hillbillies seem more lovable. Perhaps that's because I live in a northern state.

    Tom
     
  19. jayman

    jayman Senior Member

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    They use a lot less chew, and tend not to drive around with high power rifles