Better specs.50mv.
75W 15V 5A Waterproof outdoor Single Output Switching power supply SMPS AC TO DC | eBay
But you would not hear it because rimple is at 40khz and only at full power.
Normally with 1 watt output the rimple is 1 to 5mv.
75W 15V 5A Waterproof outdoor Single Output Switching power supply SMPS AC TO DC | eBay
But you would not hear it because rimple is at 40khz and only at full power.
Normally with 1 watt output the rimple is 1 to 5mv.
Thanks for pointing that out. He does have other supplies that work on 115 vac but, again, 150mv p-p ripple & noise. That's just too much! On my linear supplies, I can usually expect less than 10mv p-p. Can't SMPS supplies do anywhere close to that?
I'm partial to the flatPacs. A step up from everything IMHO.
Vicor FlatPAC VI-LU2-EV ~ 150W 10A 15V Power Supply FS | eBay
Vicor FlatPAC VI-LU2-EV ~ 150W 10A 15V Power Supply FS | eBay
Hmmmm....looked up their specs---they are quoting ~ 112 mv ripple 0n a 15 volt supply....still not all that good......
Great, that leaves more for me 
Are you considering the frequency of the ripple, and the SMPSs ability to withstand additional filtering? - will it not start with additional capacitance?
Why not go for something made in Andover MA that is subject to real scrutiny than something that, well, hmm ?
Are you considering the frequency of the ripple, and the SMPSs ability to withstand additional filtering? - will it not start with additional capacitance?
Why not go for something made in Andover MA that is subject to real scrutiny than something that, well, hmm ?
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What sort of additional filtering would you suggest, for, say an SMPS that switches at ~75 KHz? I was thinking of a 200µH coil in series, with a 0.022µF cap to ground.
What is "something made in Andover MA"?
Honestly, I'm not sure what would work best in a specific application. I've tried some things but my efforts were wasted. From memory the ripple with the vicors was above 200KHz so i didn't kill myself trying. Vicor doesn't spec a specific switching freq if I recall. I believe they start 100Khz at light load and on up to 2Mhz at full load. - please check that, it is from memory.
I'm running a threshold NS10 pre clone and associated phono pre on a 24v vicor Flatpac. There is 32,000 uF capacitance on the DC side. Starts and runs fine with the 32 there. I have no idea if the capacitance helps, but unless i'm deaf - there isn't a peep of noise. Dead silent.
I have a Pass class A M2 clone amplifier with 2x24v vicors in series (this is sacrilege) in a separate enclosure from the amp. ~10,000uf per rail on the DC side. This is the quietest amp I have ever had on my 98dB Forte' II.
I have a Pass Aleph 5 clone with 4 x vicor flatpacs. Too much hiss. I think my board layout is oscillating - or hey, maybe it's the PSUs? Don't have the time to get into it and it's too cold in the shop.
Something made in Andover MA is Vicor
I really like these things, is all.
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