I give You complete layout include the mirror bottom side and You can match with component side before print it. But You print unmirror bottom side.
Mr.Mile,
Please find the amp assembled with Irf640n,Later will change with IRFB4227 ,,will test initially with +/-45v ,
I would like to work this amp with +/-75v for subwoofer.
output is 30.5 uh with T157-2,
Nice work, replace IRF640N with TIP31C in 12V bias circuit. D200 can work with +/-75V rail.
Regards
Mr.Mile,
just checked with +/-48v I am getting Dc offset of 6.5v,
I am using BD241c in Bias ckt
Load on amp output must be connected.
i've redraw the PCB for my heatsink and i thinks it not bad
But i don't have any Schematic of this , so may i had some mistake , please check for any problem on my PCB.
I still looking for the final schematic of this amp , please post this here , thanks so much .
Regards
But i don't have any Schematic of this , so may i had some mistake , please check for any problem on my PCB.
I still looking for the final schematic of this amp , please post this here , thanks so much .
Regards
Attachments
Mr.Mile
Finally my amp worked,,, The problem was 74Hc00 pin 9,10,11 was not shorted in the PCB.
There was quite a Distorted O/P,,
Had replaced bias ckt with IRF640n and 15v zener, Then upon changing back to BD241 with 12v zener sound was clean without distortion.
Have replaced the mosfets with IRFB4227, the -ve side Mosfet warms up quite a bit, the other Mosfet is cooler,,,, is this normal,,
power supply checked with +/- 48v.
Finally my amp worked,
,, The problem was 74Hc00 pin 9,10,11 was not shorted in the PCB. There was quite a Distorted O/P,,
Had replaced bias ckt with IRF640n and 15v zener, Then upon changing back to BD241 with 12v zener sound was clean without distortion.
Have replaced the mosfets with IRFB4227, the -ve side Mosfet warms up quite a bit, the other Mosfet is cooler,,,
, is this normal,,power supply checked with +/- 48v.
Attachments
Mr.Mile
Finally my amp worked,
There was quite a Distorted O/P,,
Had replaced bias ckt with IRF640n and 15v zener, Then upon changing back to BD241 with 12v zener sound was clean without distortion.
Have replaced the mosfets with IRFB4227, the -ve side Mosfet warms up quite a bit, the other Mosfet is cooler,,,
power supply checked with +/- 48v.
Thank You Arasuk. I'm sorry, that's my mistake.
This my last version PCB , i've added some capacitor in power supply port, and more space for more capacitor in output , i think more capacitor parallel is better , and easy for find .
This my PDF file , print 100% in A4 .
Thanks .
Regards
Attachments
Mr.Mile
Have replaced the mosfets with IRFB4227, the -ve side Mosfet warms up quite a bit, the other Mosfet is cooler,,,
power supply checked with +/- 48v.
It isn't normal... use IRF640N instead IRFB4227 with +/-48V rails.
Regards
from suggested of Mr.Arasuk
Regards
Nice work, but there is mistake.
