Ultra Simple Class D

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#642
stewin said:
hi all , i have made many pcb versions of this amp ,

i still stick to the original schematic in the above link.

the thing i found interesting in this amp is that it requires original tl074/084 and bc327 and bc337 . if you compromise in this area it will consume alot of current at idle an produce hf noise.

my question is can i use two lm339 instead of tl074/084 and which other transistor can i use to substitute bc337 and bc327 😕


vvv vvv my current project vvv vvv
Click to expand...
What is the size of the coile,and how many turns should it be?
 
#643
stewin said:
hi all , i have made many pcb versions of this amp ,

i still stick to the original schematic in the above link.

the thing i found interesting in this amp is that it requires original tl074/084 and bc327 and bc337 . if you compromise in this area it will consume alot of current at idle an produce hf noise.

my question is can i use two lm339 instead of tl074/084 and which other transistor can i use to substitute bc337 and bc327 😕


vvv vvv my current project vvv vvv
Click to expand...

Are this pcb with smd tested and working?
 
#645
stewin said:
hi all , i have made many pcb versions of this amp ,

i still stick to the original schematic in the above link.

the thing i found interesting in this amp is that it requires original tl074/084 and bc327 and bc337 . if you compromise in this area it will consume alot of current at idle an produce hf noise.

my question is can i use two lm339 instead of tl074/084 and which other transistor can i use to substitute bc337 and bc327 😕


vvv vvv my current project vvv vvv
Click to expand...

I uploaded This gerber files to JLP pcb,but they say it is no drill files.
Could this be fixed?
 
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#646
stewin said:
hello all , i have made my latest version of this amp , i opted for a through hole ic due to challenges in getting a geniune tl074/84 smd . imagine the smd also have issue 🙁,
A not original ic works fine in preamp,eq, crossovers etc , but can't work well in this class d amp ,
with this amplifier it works but the amp produces a lot of hf . but when i use a good geniune ic the hf noise reduces and the amp does not draw a lot of current
but a geniune tl074/84 works with no issues at all .

here is my project and pcb files . have fun fam 😀😀
Click to expand...
I made new Gerberfiles from this....
 
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#648
ir2153 classd

Anyone tried this😀
 

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