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  1. Thread: Active PFC

    by ashiekh
    Replies
    10
    Views
    205

    I would say inductance; if connected in parallel...

    I would say inductance; if connected in parallel the capacitance doubles, but the inductance halves (above and beyond the fact that they each already have less inductance than a single one of double...
  2. Thread: Active PFC

    by ashiekh
    Replies
    10
    Views
    205

    You are right, I'll try not to cross thread...

    You are right, I'll try not to cross thread...
  3. Thread: Active PFC

    by ashiekh
    Replies
    10
    Views
    205

    I'm not so sure I want APFC; given how it may not...

    I'm not so sure I want APFC; given how it may not like some rectangular wave UPS outputs (so called pseudo sine wave)
  4. Thread: Active PFC

    by ashiekh
    Replies
    10
    Views
    205

    In the 'old' days it was so they could be...

    In the 'old' days it was so they could be connected differently for 110V or 220V (for 110V they were connected to form a voltage double using 2 of the bridge diodes)
  5. Thread: Active PFC

    by ashiekh
    Replies
    10
    Views
    205

    I believe you; so the label lies.

    I believe you; so the label lies.
  6. Replies
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    585

    Good point.

    Good point.
  7. Replies
    32
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    999

    Absolutely not, it could behave quite differently...

    Absolutely not, it could behave quite differently under load; even under load the meter will not see how much ripple there is. That is why it is good to look if the power supply capacitors are...
  8. Thread: Active PFC

    by ashiekh
    Replies
    10
    Views
    205

    Active PFC

    Does APFC always imply one capacitor?

    I have a KDM-M6480 that claims

    "Active PFC 115-230 Volts AC" on the label

    but at the same time it has a voltage selection switch and two primary...
  9. Replies
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    999

    -5V is obsolete and not found on modern power...

    -5V is obsolete and not found on modern power supplies; to quote Scott Muller's Upgrading and Repairing PCs

    "-5V was removed from the ATX12V 1.3 and later specifications."

    ...
  10. Replies
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    585

    And yet it might be the GPU you need to stress.

    And yet it might be the GPU you need to stress.
  11. Replies
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    222

    Get a high quality unit which uses high quality...

    Get a high quality unit which uses high quality capacitors; only a few fools (myself included) are still using supplies that are 10 years old.

    It used to be that primary caps rarely failed, but...
  12. Replies
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    2,324

    Now that I think on it, it is rather easy once...

    Now that I think on it, it is rather easy once one realizes that the solar power people feed back into the grid, using a grid-tie inverter.
  13. Replies
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    2,324

    I was wondering about this and thought to suggest...

    I was wondering about this and thought to suggest using inverters, but the idea got rather complicated. How is it done in reality?
  14. Replies
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    64

    And only $210 ...

    And only $210

    https://www.circuitspecialists.com/hantek2d72_70mhz_oscilloscope.html
  15. If it is a MOV over-voltage suppressor one indeed...

    If it is a MOV over-voltage suppressor one indeed needs a high voltage pulse for testing, but if it is an RC snubber one can test without high voltage.
  16. Replies
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    232

    Do they have different part numbers? ...

    Do they have different part numbers?

    http://www.orionpsudb.com/corsair
  17. Replies
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    64

    Scary electric shower water heater

    https://www.youtube.com/watch?v=06w3-l1AzFk&feature=youtu.be&utm_source=Circuit+Specialists+Newsletter&utm_campaign=5bd661e86d-EMAIL_CAMPAIGN_2019_06_20_10_13&utm_medium=email&utm_term=0_dd242259e3-5b...
  18. Doesn't your Antec TPC 550w have a 3 year...

    Doesn't your Antec TPC 550w have a 3 year warrantee?
  19. 35 C is below body temperature, not worth the...

    35 C is below body temperature, not worth the trouble; why not just go back to the default setting.
  20. Glad to be of help.

    Glad to be of help.
  21. Sticky: No concern about the voltage drop?

    No concern about the voltage drop?
  22. Sticky: The first I had forgotten, the second is new (to...

    The first I had forgotten, the second is new (to me).
  23. Sticky: Solid state relays ;-)

    Solid state relays ;-)
  24. Sticky: What are relays used for in power supplies? all...

    What are relays used for in power supplies? all mine are old and have none.

    I once tried to figure out how to make a transistor/relay hybrid, the idea being that the transistor and relay were in...
  25. Replies
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    746

    With so many people to employ, automation just...

    With so many people to employ, automation just doesn't make sense for China
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