SMPS to LPS Eversolo

Hi. I want to replace this switch mode with a linear supply. I understand the +12v, -12v, and GND. But what is the 5VD for? 5v dc one side positive one negative? It is not really making sense to me since the power supply only outputs +-12v. Can anyone please explain this to me and possibly suggest a board that I can stuff, that will work with this? I found this LPS , but I rather build one that is hopefully better, it doesn't have to fit in the case. Thanks.





Eversolo.jpg
 
There are probably some voltage regulators on the PCB that regulate the 12V from the SMPS down to 5V. So you will probably only need to supply the +-12V to the board, as the PS is currently doing.

I am curious what you will come up with, 12V at 2A will need a substantial mains transformer, that will quite sure not fit in there.
 
It is the Eversolo DMP-a6. I was thinking of buying it and upgrading it. Teddy Pardo has a good upgrade option but it is $500 and I was looking to spend a lot less. I have only built a wolverine amplifier so far. I am not an expert but I know the way around the internals a little bit.
 
I see, interesting product! I saw this power supply as well https://www.beatechnik.com/product-page/lps-a6-eversolo-dmp-a6 , less than 500.00.

You can probably make it yourself for less money by gathering unpopulated PCBs, components from eg Mouser or Digikey and so on. You will learn a lot along the way, that is our DIY spirit :) but it will take time and probably be not as nice looking as eg the LPS-A6.

Why did you previously write you need a 27V AC transformer? I would look up some tutorials on how to make a regulated linear power supply. It starts with transformer, rectificiers, filtering caps, regulator, output caps... Other people here used kits from this shop to make low noise PS.
https://www.diyinhk.com/shop/audio-...e-dac-power-supply-regulator-3357v-14ax2.html

Disclaimer :) I can understand that you want to try a different PS, I do that in my projets as well. I am not claiming that one sounds better than the other.
 
That 27 is indeed DC power, so W. You will need a mains transformer with primaries of 115VAC (as you are in the USA) and secondaries around 12VAC and 3A. This will be rectified and filtered to about 12V AC* sqrt(2) - voltage drop over diodes, so about 15VDC, which you will have to regulate down (LT1085 for example, probably there are quieter ones out there) to 12VDC. There is a 3VDC over this regulator (15V in and 12V out), and if the circuit pulls 2A from it you will need to dissipate about 6W of power (3V drop * 2A current), which requires a nice heatsink. Similar for the -12V, but there you will have less heat in the regulator, probably won't even need a heatsink.
 
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Hi. I want to replace this switch mode with a linear supply. I understand the +12v, -12v, and GND. But what is the 5VD for? 5v dc one side positive one negative? It is not really making sense to me since the power supply only outputs +-12v. Can anyone please explain this to me and possibly suggest a board that I can stuff, that will work with this? I found this LPS , but I rather build one that is hopefully better, it doesn't have to fit in the case. Thanks.





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Did you measured the 5VDC on the pins ? if look at the right side, there is an identical slot where these voltages should be found identical ... try measuring without the 6 wires connector attached. This way you can find out if the voltage is coming from the motherboard toward the SMPS or it is delivered FROM the SMPS toward the motherboard. Or ... maybe there are no voltages at all ... on those pins