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    Gallium Nitride or running transistors hot might...

    Gallium Nitride or running transistors hot might be a way to efficiency without added complexity, although if I recall correctly (doubtful) there is complexity for the designer as one turns Gallium...
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    The best possible figures are based on...

    The best possible figures are based on temperatures and thermodynamics (T_in - T_ex)/T_in where temperatures are in Kelvin

    I will let the moderators decide if we are off track or not.

    But one...
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    I would question that claim. Physics...

    I would question that claim.


    Physics Concepts and Connections 5th edition, Art Hobson P 140

    Efficiencies

    Steam locomotive
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    Perhaps part of the problem is that some people...

    Perhaps part of the problem is that some people feel that half the ripple is twice as good, but one can go on halfing indefinitely. So money may get spent on a feature that is actually of little...
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    Ah, I guess I supposed efficiency came at the...

    Ah, I guess I supposed efficiency came at the cost of complexity.


    Then again I have one of the early VTEC-E engines, and it just keeps on running.
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    You in the last few weeks; or am I imagining...

    You in the last few weeks; or am I imagining it... something about complexity affecting the life.
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    Efficiency, but at what price.

    If I have understood correctly, modern PC power supplies achieve efficiency but at the cost of reduced life times (correct me if I am wrong).

    If so, which series should I be looking at if...
  8. Thread: TechPowerUp

    by ashiekh
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    I wonder if this is a generic observation, that...

    I wonder if this is a generic observation, that small groups tend to be more harmonious than large.
  9. Thread: TechPowerUp

    by ashiekh
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    At first I wondered about the problem of a single...

    At first I wondered about the problem of a single sided board, but double sided have through plated holes and the tracks tend not to lift when replacing components, so I now see a virtue in double...
  10. Isn't the ATX standard 16ms?

    Isn't the ATX standard 16ms?
  11. Thread: TechPowerUp

    by ashiekh
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    That I also noticed.

    That I also noticed.
  12. Thread: TechPowerUp

    by ashiekh
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    Maybe I am just spoiled; this forum seems more...

    Maybe I am just spoiled; this forum seems more reasonable.
  13. Thread: TechPowerUp

    by ashiekh
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    Phew...

    Phew...
  14. Thread: TechPowerUp

    by ashiekh
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    TechPowerUp

    Is it just me or are the TechPowerUp forums a little caustic these days?
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    Less heat produced? I still need to understand...

    Less heat produced?

    I still need to understand the air gaps.
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    Can you give a quick rundown of the advantages of...

    Can you give a quick rundown of the advantages of sendust to iron powder
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    They also used dry nitrogen, so the lack of...

    They also used dry nitrogen, so the lack of corrosion might have been a big factor. I have fixed a lot of contacts with silicone oil.
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    I agree and suspect that leaded solder may be...

    I agree and suspect that leaded solder may be better at handling thermal cycling than unleaded.
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    I do like paradoxes and I was thinking of running...

    I do like paradoxes and I was thinking of running hot, not overheating.

    To me it is a big deal if a reviewer feels things are running hot when it may actually be intentional; some transistors can...
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    Paradoxically missing a heat sink can improve...

    Paradoxically missing a heat sink can improve efficiency as hot transistors/diodes have less of a voltage drop (thermal energy helps).
  21. Is that a good thing? given the problem with some...

    Is that a good thing? given the problem with some video cards; or am I mixing things up.
  22. Last and being compatible with modern hardware...

    Last and being compatible with modern hardware are two different things.

    I have OEM supplies that are still fine after 10 years; I recap them anyway and they may be good for another 20, but I...
  23. Thread: AC/DC

    by ashiekh
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    AC/DC

    I didn't realize that AC and DC were so very different in regard to switching

    https://www.youtube.com/watch?v=Zez2r1RPpWY
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    The only thing this device misses is if the...

    The only thing this device misses is if the ground is weak, as it hardly loads the ground at all, but is well worth having.
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    You can test the ground with a plug tester; don't...

    You can test the ground with a plug tester; don't need the wiring diagram.
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