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Old 28th April 2016, 06:48 PM   #1
maurycy is offline maurycy  United States
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Default Which PCB for power supply?

I am going to build ESP's P101 amplifier (150W into 8 Ohms, 400VA trafo) but I do not want to mess with creating my own PCB for the power supply. I found couple on Ebay that look decent but I would like to get your opinion if they are suitable for this amplifier.

board 1

board 2

Also, sellers do not provide schematic or BOM. How do I know what component values (be sides the main caps and rectifier) should I use? The blue board looks like it has only two additional capacitors but the other board has a lot more components. For the main caps I was planning on using 4x4700uF as recommended on ESP's website. Rectifier is going to be 400V 35A.
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Old 28th April 2016, 07:11 PM   #2
Mooly is offline Mooly  United Kingdom
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The green board looks to have an option to add a resistor and LED to show when each rail is up. Four small (e.g. 10nf/400vdc) caps across each diode in the bridge and two similar type caps at the DC output.

Resistor value to suit LED. Probably around 10k
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Old 28th April 2016, 07:38 PM   #3
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remember , that board 1 allows only 30mm diameter capacitors, usually the common sizee is 35 mm. I used these boards
Capacitor Filter Bare PCB Support 6pcs D35MM Electrolytic Capacitors | eBay

and mount my rectifier bridge on the heatsink. This board allows you to use 4 or 6 capacitors and allows different footprints and different diameters.

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Old 29th April 2016, 08:19 AM   #4
Ryssen is offline Ryssen  Sweden
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Why not use the one in the Diyaudio store?
Universal PSU – diyAudio Store (BETA)
Regards Åke
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Old 29th April 2016, 01:03 PM   #5
maurycy is offline maurycy  United States
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Thanks for replies. The board Gunni sent a link to looks nice and simple. I may get that as the P101 amp does require chassis mounted rectifier.
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