I zei,
it's a kind of spitting or whisper on certain frequency. Firstable i think it's irf 610 or irf 9610 generate noise, but after change i have the same noise. I change one by one the 10µf and the 680p and ztx 450 and ztx 550 but nothing change. I verify the ground but it's good.I don't know any more what to make, because the other way functions very well .
it's a kind of spitting or whisper on certain frequency. Firstable i think it's irf 610 or irf 9610 generate noise, but after change i have the same noise. I change one by one the 10µf and the 680p and ztx 450 and ztx 550 but nothing change. I verify the ground but it's good.I don't know any more what to make, because the other way functions very well .
My problems are caused by oscillations. Nelson Pass suggest to add a 221 ohm resistor on the output side in one of the diyaudio thread, but without result. It's necessary to add a condenser between 10pf and 400pf, to make test to see whether the band-width does not decrease.
Now the sound is formidable, much of depth, more details, my blocks quad as never as well functioned.
I continue my investigations and the pictures will follow.
Now the sound is formidable, much of depth, more details, my blocks quad as never as well functioned.
I continue my investigations and the pictures will follow.
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