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  • Users: rodneyb
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  1. rodneyb

    altitude vs. temperature

    I am modeling an electronic heat sink specified to 10,000 ft. How should I change the pressure to handle this? Will lowering the environmental pressure correct the elevation change? -R
  2. rodneyb

    FPGA Thermal Conductivity

    I am cooling an electronics enclosure and there are several heat sources I need to model. These are modeled as homogeneous blocks, so I do not think I need the exact thermal characteristics of each chip. Has anyone worked on this? -R
  3. rodneyb

    Plastic Countersunk Screw

    I read it is bad practice to put countersunk screws in plastic, since it spreads the material. Does anyone have any experience with this? Thanks, Rodney
  4. rodneyb

    Tapped Hole Modeling

    Is there some where you can download nuts with the actual tapped section intact. I can easily find the screws and bolts but not the nuts. I am creating a mold and need have the tapped section modeled. Thanks, -R
  5. rodneyb

    FCC Symbol

    Does anyone have the FCC symbol in a graphic format not a bitmap?
  6. rodneyb

    Thermal Epoxy

    Has anyone looked for a top grade thermal epoxy? I need to pot an entire board and a Celeron CPU will be running very hot. This will be the thermal barrier to the heat sink that will sit on top of the entire borad. Thanks, Rodney
  7. rodneyb

    Flat Head Screw Standards

    Are there anyother common specs for #2 screws other than ASMI? I have a part with a hole spec'd for a #2 flat head counterbore and the diameter is .155? Thanks, Rodney
  8. rodneyb

    Thermal Modeling Software

    Does anyone have any experience using FEM to estimate thermal conditions inside of an electronic enclosure? I would like to evaluate a software package, but all the ones I have tried seem fairly lame.. Thanks, Rodney
  9. rodneyb

    PCB Properties

    Does anyone know where to find or what the PCB thermal properties are? I need: Conductivity Density Specific Heat Also has anyone used QFin for thermal designs?
  10. rodneyb

    3D CAD to Web software

    I am looking for an inexpensive authoring tool that will take 3D files and put them into a browser for viewing. I have looked at 3D partstream, too expensive, Actify, Viewpoint and others.. all seem to expensive. I can export just about any type of file type. I use IronCad..
  11. rodneyb

    Redundatn Power - Hot swap

    I am in the starting stages of designing a 1U chassis, with redundant, hot swappable power supplies. Does anyone have any info on off the shelf products that would meet these needs. I need 120 AC input and 3.3, 5, and 12 DC outputs.
  12. rodneyb

    -48 Volt Adapter

    Where can I find an adapter to take 110 VAC input and convert to -48VDC out put? Thanks...
  13. rodneyb

    -48 Volt Inverter

    Does anyone know where to find a -48 VDC inverter to 115VAC? Preferrably rack mount.
  14. rodneyb

    Bending Steel

    What is the best method of bending steel beams? This application will be used on the front of a construction trailer frames. The max beam width will be 84" the min beam width will be 48". Several different structural steels will be used ranging from 4" C-Shape to 12" I...

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