Looking for a 36V power supply...

Saurav · 24th September 2006, 07:24 PM

... for a DIY phono stage. Does anyone make something like this? I'd like 1-2A of capacity, so that probably rules out most wall-warts. Regulated would be nice, but not necessary, the phono stage has a fair amount of regulation on it.

I looked around a bit, and the only things I can see are the lab equipment, and that's pretty expensive (mid to high 3 digits). All the cheaper ones seem to max out at 12V. I did find a few 36V units at Digikey, but I have no idea if they're any good or not.

So... does anyone have a recommendation for something like this? If I can't find one, I'll build one, but I'm hoping there's something like this out there.

Thanks,
Saurav

cliffforrest · 24th September 2006, 09:29 PM

2amps at 36V for a phono amp ???

Get real!

What exactly do you propose to do with those 72 watts?

Saurav · 24th September 2006, 09:55 PM

OK, maybe 500mA - 1A would be more realistic. In other words, I don't want a 100mA wall-wart.

Do you have any suggestions at that power level?

Leolabs · 25th September 2006, 01:32 AM

What kind of power supply??Linear or switching???

Saurav · 25th September 2006, 04:16 AM

Thanks, I should have mentioned that. Preferably linear.

Bakmeel · 25th September 2006, 08:53 AM

Quote:

Originally posted by cliff
2amps at 36V for a phono amp ???

Get real!

What exactly do you propose to do with those 72 watts?

An Aleph Ono draws 60W continuous on 2 x 32V. Ok, that includes a fair amount of LEDs for the display, but any class A phono amp, biased high enough can draw just that.

Saurav,
For that purpose you might want to look at the Aleph Ono Power supply. Its fairly simple, and supplies just what you need.

Cheers,
Bouke

Saurav · 25th September 2006, 07:05 PM

Thanks. I was trying to avoid having to build one

I found a few switching supplies at Newark etc. that would fit the voltage/current needs. But a switching power supply on a phono stage... that can't be good, right?

The only other units I can find are the bench/lab power supplies.

Bakmeel · 25th September 2006, 07:30 PM

As long as you make sure the PSU's are well filtered and/or have their switching frequencies above 25kHz. Those switching supplies on Newark are often industrial EMC class, and emit more noise than one might want in a phono amp. If it goes wrong you could try adding some filtering yourself, but that works up to a certain level.

Have you considered taking two single 36V linear regulators (wall wart style) and hooking them up in series? Use the center tap as virtual "0V" connection.

Saurav · 25th September 2006, 07:43 PM

I only need single-ended 36V, not +/- 36V. So a single 36V linear power supply is exactly what I'm looking for. Where do I find such a thing? All the ones I see are switching, or 12V. And it doesn't have to be exactly 36V. The regulator in the phono stage needs something above 35, I could probably go up to 45 with no problems. Don't know about 48.

theAnonymous1 · 25th September 2006, 08:45 PM

If its going to feed a regulator; why don't you just use an appropriate transformer, rectifier, and caps?

24th September 2006, 07:24 PM	#1
Saurav diyAudio Member Join Date: Sep 2002 Location: Oregon, USA	Looking for a 36V power supply... ... for a DIY phono stage. Does anyone make something like this? I'd like 1-2A of capacity, so that probably rules out most wall-warts. Regulated would be nice, but not necessary, the phono stage has a fair amount of regulation on it. I looked around a bit, and the only things I can see are the lab equipment, and that's pretty expensive (mid to high 3 digits). All the cheaper ones seem to max out at 12V. I did find a few 36V units at Digikey, but I have no idea if they're any good or not. So... does anyone have a recommendation for something like this? If I can't find one, I'll build one, but I'm hoping there's something like this out there. Thanks, Saurav

25th September 2006, 07:30 PM	#8
Bakmeel diyAudio Member Join Date: Jan 2002 Location: The Netherlands	As long as you make sure the PSU's are well filtered and/or have their switching frequencies above 25kHz. Those switching supplies on Newark are often industrial EMC class, and emit more noise than one might want in a phono amp. If it goes wrong you could try adding some filtering yourself, but that works up to a certain level. Have you considered taking two single 36V linear regulators (wall wart style) and hooking them up in series? Use the center tap as virtual "0V" connection. __________________ More Power Igor! More Power!

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24th September 2006, 09:29 PM	#2
cliffforrest diyAudio Member Join Date: Sep 2004 Location: UK	2amps at 36V for a phono amp ??? Get real! What exactly do you propose to do with those 72 watts?

24th September 2006, 09:55 PM	#3
Saurav diyAudio Member Join Date: Sep 2002 Location: Oregon, USA	OK, maybe 500mA - 1A would be more realistic. In other words, I don't want a 100mA wall-wart. Do you have any suggestions at that power level?

25th September 2006, 01:32 AM	#4
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	What kind of power supply??Linear or switching???

25th September 2006, 04:16 AM	#5
Saurav diyAudio Member Join Date: Sep 2002 Location: Oregon, USA	Thanks, I should have mentioned that. Preferably linear.

25th September 2006, 07:05 PM	#7
Saurav diyAudio Member Join Date: Sep 2002 Location: Oregon, USA	Thanks. I was trying to avoid having to build one I found a few switching supplies at Newark etc. that would fit the voltage/current needs. But a switching power supply on a phono stage... that can't be good, right? The only other units I can find are the bench/lab power supplies.

25th September 2006, 07:43 PM	#9
Saurav diyAudio Member Join Date: Sep 2002 Location: Oregon, USA	I only need single-ended 36V, not +/- 36V. So a single 36V linear power supply is exactly what I'm looking for. Where do I find such a thing? All the ones I see are switching, or 12V. And it doesn't have to be exactly 36V. The regulator in the phono stage needs something above 35, I could probably go up to 45 with no problems. Don't know about 48.

25th September 2006, 08:45 PM	#10
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	If its going to feed a regulator; why don't you just use an appropriate transformer, rectifier, and caps?

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