When I have designed audio supplies before, I put a ceramic 100nF cap across op-amp rails and such, not on the supply rail, you put them close to the noise source or part that does the amplification or switching. Audio supply regulation is not as easy as it sounds, all the LMxx, 317, 308 are poor at regulating audio frequencies, but thats only showed on some old datasheets. If anyone is really crazy to reduce noise, most noise is thermally based, its proportional to temperature, so application of a Peltier cooler to bring that temperature down on critical components (audio path high-resistances etc) will no doubt improve it, however most speakers have distortion above 1% anyway, even great ones like the Jamo C8 can near 0.5% so some parts of the frequency band, so you have to be sensible on what you do.
Pretty happy with the Fosi V3, but also do love a bit of a tinker. Keen to see what mods you come up with and how this little powerhouse can be improved.
When I have designed audio supplies before, I put a ceramic 100nF cap across op-amp rails and such, not on the supply rail, you put them close to the noise source or part that does the amplification or switching.
Audio supply regulation is not as easy as it sounds, all the LMxx, 317, 308 are poor at regulating audio frequencies, but thats only showed on some old datasheets.
If anyone is really crazy to reduce noise, most noise is thermally based, its proportional to temperature, so application of a Peltier cooler to bring that temperature down on critical components (audio path high-resistances etc) will no doubt improve it, however most speakers have distortion above 1% anyway, even great ones like the Jamo C8 can near 0.5% so some parts of the frequency band, so you have to be sensible on what you do.
Pretty happy with the Fosi V3, but also do love a bit of a tinker.
Keen to see what mods you come up with and how this little powerhouse can be improved.
exciting, thank you
You're welcome mate
Nice anti-static mat...
Sure is works a treat trevor see ya when I get my glasses
Haha.... Great song choice. 😂
What is the Value of the capacitor your recommend?
Hi 100 n buy the best quality you
can
can bypass op amps???
Hi I did mate far better sound it the gain is less though
Could you please stop shaking your camera, thanks!
The small EL-caps around OP-Amp seems not in good condition...
What's the result after your mod?
@@TT-it9gg they ok mate ie caps the opamps i like is lm4562 cheap and they sound nice
Jesus christ dude, these op amps use split power supplies, pin 8 is positive and pin 4 is negative rail (NOT GROUND). Just stop teaching nonsense.