Power supply capacitors

rubin
rubin Posts: 565
edited October 2010 in Electronics
Heat sinks heat up, thats their purpose. I've noticed the transformer and the power caps don't. So is that normal for a class a/b power amp.
Post edited by rubin on
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  • Ricardo
    Ricardo Posts: 10,634
    edited October 2010
    I don't think you should be sticking your fingers in there to see if they are hot ;)
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  • rubin
    rubin Posts: 565
    edited October 2010
    Ricardo wrote: »
    I don't think you should be sticking your fingers in there to see if they are hot ;)

    I'm careful :) Even after several hours and the heat sinks are HOT, the toroidal transformer and the caps stay cool :confused:
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  • Ricardo
    Ricardo Posts: 10,634
    edited October 2010
    The transformer and capacitors are not supposed to get hot. The heat dissipated by the heat sinks come from the transistors (MOSFET's).
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  • rubin
    rubin Posts: 565
    edited October 2010
    Ricardo wrote: »
    The transformer and capacitors are not supposed to get hot. I think the heat dissipated by the heat sinks come from the transistors (MOSFET's).

    Ok thanks for the reply.
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  • cristo
    cristo Posts: 231
    edited October 2010
    Ricardo wrote: »
    I don't think you should be sticking your fingers in there to see if they are hot ;)

    If you have tube gear, be especially careful checking the warmth of the power supply capacitors,
    as they can carry a potentially lethal >400V wallop.
    cristo

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  • rubin
    rubin Posts: 565
    edited October 2010
    cristo wrote: »
    If you have tube gear, be especially careful checking the warmth of the power supply capacitors,
    as they can carry a potentially lethal >400V wallop.

    these are ss amps, I know enough so as not to touch wiring of anything metalic .
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  • ben62670
    ben62670 Posts: 15,969
    edited October 2010
    reported
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