johnjen
Headphoneus Supremus
Nice build on your LPS, with plenty of extra space for 'upgrades' like adding additional bypass caps for 'faster' PSU response.
So when the itch to sling hot solder around takes hold… hahahahahaha
I too have made several LPS's for my AOIP setup and have replaced 5 SMPS's.
And along the way I measured the digital hash that SMPS's create which was substantial.
And after I made the LPS's I measured their noise as well, which is substantially less.
Then the kicker was, I measured the noise at the LPS's when it was running an ethernet to optical converter and found that digital devices contribute a substantial amount of noise that LPS's can't fully suppress.
IOW just running any digital device generates a fair amount of noise and the SMPS adds even more.
So the take away is to use as few digital devices as possible and avoid SMPS's where ever possible.
And the noise that SMPS's (and all digital circuits) create can 'sneak' back into the ac distribution system especially the ground circuits that directly feed into all of our audio gear, which then modulates the entire circuit for all such operating devices.
This is why I shut down the modem, router, screen etc. when I want 'optimal' SQ.
And granted the SQ improvement is not huge but is easily discernible in my system, especially late at night when the entire house is quiet and still.
And if you understand how SMPS's operate (they generate noise right in the middle of the audio band) which is filtered out (meaning dumped into ground), as well as they inject this switching noise back into the hot and neutral ac power lines.
And while some claim that that SMPS's can be designed that don't impact the SQ of the device they power, my take is if I don't create this noise in the 1st place (or create substantially less) then there is less that can 'contaminate' the ac mains supplying power that then feeds the rest of the audio gear.
And that's my story and I'm sticking to it… hahahahahahahah
JJ
So when the itch to sling hot solder around takes hold… hahahahahaha
I too have made several LPS's for my AOIP setup and have replaced 5 SMPS's.
And along the way I measured the digital hash that SMPS's create which was substantial.
And after I made the LPS's I measured their noise as well, which is substantially less.
Then the kicker was, I measured the noise at the LPS's when it was running an ethernet to optical converter and found that digital devices contribute a substantial amount of noise that LPS's can't fully suppress.
IOW just running any digital device generates a fair amount of noise and the SMPS adds even more.
So the take away is to use as few digital devices as possible and avoid SMPS's where ever possible.
And the noise that SMPS's (and all digital circuits) create can 'sneak' back into the ac distribution system especially the ground circuits that directly feed into all of our audio gear, which then modulates the entire circuit for all such operating devices.
This is why I shut down the modem, router, screen etc. when I want 'optimal' SQ.
And granted the SQ improvement is not huge but is easily discernible in my system, especially late at night when the entire house is quiet and still.
And if you understand how SMPS's operate (they generate noise right in the middle of the audio band) which is filtered out (meaning dumped into ground), as well as they inject this switching noise back into the hot and neutral ac power lines.
And while some claim that that SMPS's can be designed that don't impact the SQ of the device they power, my take is if I don't create this noise in the 1st place (or create substantially less) then there is less that can 'contaminate' the ac mains supplying power that then feeds the rest of the audio gear.
And that's my story and I'm sticking to it… hahahahahahahah
JJ
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