udc xlite
Good afternoon Kartino, my name is jonas, I'm trying to mount the amplifier "ucd-xlite v.2 final". But I'm just burning components, I have several schematics here I tried to mount the "ucd xilina" among others but I'm not having success, I would like your help if I can send the pcb pci design, I can pay for it if that's the case .... My name is Jonas, I'm from Brazil.-
Good afternoon Kartino, my name is jonas, I'm trying to mount the amplifier "ucd-xlite v.2 final". But I'm just burning components, I have several schematics here I tried to mount the "ucd xilina" among others but I'm not having success, I would like your help if I can send the pcb pci design, I can pay for it if that's the case .... My name is Jonas, I'm from Brazil.-
Sorry I cannot post PCB layout or send PCB.
I just do it electronic for hobby. But layout by other.
I just do it electronic for hobby. But layout by other.
ucd xlite
Thank you kartino. A question, can I withdraw the balanced input stage and a simple preamp.
Thank you kartino. A question, can I withdraw the balanced input stage and a simple preamp.
I managed to make it work, however the mosfet irfp260 are heating up a lot and without load .. but the sound is coming out in the speaker and beautiful ... some subject of how to reduce the heating of the mosfet and increase the frequency to 250 to 350khz of pwm
IRFP260 is ideal up to 250kHz like branded amp
To have clean hi sound you will need at least 300kHz. Mine is 330kHz quite good almost like class AB
To have clean hi sound you will need at least 300kHz. Mine is 330kHz quite good almost like class AB
And what component should change to make the pwm go to the 300khz, and another thing when the power increases the pwm falls, ie it fails, as if it were missing current, amps in the sector of 12v, and what maximum power that I can extract from this amplifier .
Seems it is poor quality of parts
Like Master Bruno Putzeys said: No tricks but good parts. In Class D this is the rule.
xlite
I've assembled with components available here, but as informed in the schematic, my problem is that pwm starts to turn a sine wave when the power starts to rise + - about 200w rms for more
I've assembled with components available here, but as informed in the schematic, my problem is that pwm starts to turn a sine wave when the power starts to rise + - about 200w rms for more
An externally hosted image should be here but it was not working when we last tested it.
I've assembled with components available here, but as informed in the schematic, my problem is that pwm starts to turn a sine wave when the power starts to rise + - about 200w rms for more
I've assembled with components available here, but as informed in the schematic, my problem is that pwm starts to turn a sine wave when the power starts to rise + - about 200w rms for more
Foto link corrected:
An externally hosted image should be here but it was not working when we last tested it.
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
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
Attachments
hi katrino nice build on your amplifier i have seen the videoz it looks great .😉😉
http://www.diyaudio.com/forums/attachments/class-d/564219d1470816641-my-diy-ucd-ucd-xlite-v.1b.pdf
http://www.diyaudio.com/forums/atta...1471596502-my-diy-ucd-ucd-xlite_v.2_final.pdf
Thank you stewin, I put a trimpot of 270R in their place gave a great improvement. But the pwm is 220khz the mosfet has cooled, now it is lacking power, to a certain volume it plays well, then starts to make noise, as if the pwm were turning off and reconnecting
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