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360V 1200uF electrolytic cap help.

Discussion in 'd.i.y.' started by sean newman, Jun 11, 2006.

  1. sean newman

    sean newman pfm Member

    To anyone in the know,

    I'm having trouble locating one of these for a friends amp. If any of you have any idea where I can lay my hands on one it would be much appreciated.

    Ta, Sean.
  2. quickie

    quickie SE 'A' Class

    1000uf @ 385 v or 2200uf @ 350v is all I could find.

  3. sean newman

    sean newman pfm Member

    me too, all there or there abouts but none the correct value.
  4. quickie

    quickie SE 'A' Class

  5. martin clark

    martin clark pinko bodger

    I would worry about the working voltage rating far more than capacitance since electrolytics are notoriously wide tolerance. A tolerance -20, +50% would be quite normal for electrlytics such as this, meaning that anything of 1000uF or above will be more than enough. I'd hold out for a 400V rating at least.

    This is obviously a PSU part, and will be storing a huge amount of energy in use; 1500uF at 400v = 100J, so take great care please :) Also note - dialectric absorption means the old caps may well recover enough voltage to 'bite' after they've been 'drained and disconnected; I'd be tempted to leave them with a 100k bleeder resistor across them until disposed of.
  6. sean newman

    sean newman pfm Member

    Many thanks for all the help. Managed to locate a 400V 1200uF cap from RS and will be fitting it next week.

  7. Fretless Eric

    Fretless Eric Musketeer Bathos

    Sound advice Martin. Thanks for the reminder!!

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