My DIY UCD

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kartino

Disabled Account
Joined 2005
stewin said:
hi katrino i had made this amp , the version of classd from ru the amp was nice and clear the only disadvantage is that i never had good fets i used irf540 for low power and irfp250 for hi power. when i used hi voltage like +/-70vlts the amp failed i suspect it was the fets but now that i have irfb4227 and many smd parts e.g mmbt5401/5551 mmbt 4403/3903 i will revist the project.

by the way how many voltage are you using with your discreet version? also your load and output fets that you have used?

diysmps

diysmps
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Hi,

Compare with my schematic.
The russian version is not safe for big output. A small different maybe looked nothing but I put a lot effort to make the amp very stable.
 
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joaolima

Member
Joined 2010
hello everyone congratulations for the kartino projects I'm joaolima from brazil I'm a hobby hobbyist for electronics and wanting to build amps class d discrete too
I downloaded the schemas you posted I would like to know if I can use mpsa92 and mpsa42 instead of 2n5401 and 5551 in advance thanks
 
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