Phase Evolution Opus 500.1 replace question

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pergo

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Joined 2008
Hi all,:)

my friend gave me a broken Phase Evolution Opus 500.1 class D amplifier.
It has broken PSU mosfet caused by failure in output stage.

I replace those mosfet (irfz44) with IRF3205 with 10ohm gate resistor.:D
I turn on-off very well, of course.

The output stage is made by FQP12P20 and FQP19N20 in to220 package.
Someone, very smart:eek:, replace one FQP19N20 with another mosfet 600Vdss and 10A...in fact...a disaster:eek::eek:. (crazy man!)
That caused the damage.:mad:

I searching for original output mosfet but i would know if it is possible to use another mosfet, like IRF640 and IRF9640 by IR (similar specs):eek:

I know that some class D amplifier need only original parts (like mtx).:(
This is one of those?:confused:

I found original FPQs, but they costs 2€/piece + shipping (10€)
I found IRF much cheaper.

Thank you very much:)
 
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