Hi all,
I just finished building a Pass DIY Phono preamp (actually two, one for each channel), and I'm looking at ways to power it. It requires +28-34v, ground, and -28-34v connections. I tested the boards with 6 9v batteries in series, with ground connected at the midpoint, and they work well.
So I purchased this PS: Power Supplies, Power Supply, Bench Supplies, Transformers
Unfortunately there's no ground connection on the supply, and I can't locate a schematic for it. Any ideas for using this particular supply with my project? Or is it a writeoff?
Thanks
I just finished building a Pass DIY Phono preamp (actually two, one for each channel), and I'm looking at ways to power it. It requires +28-34v, ground, and -28-34v connections. I tested the boards with 6 9v batteries in series, with ground connected at the midpoint, and they work well.
So I purchased this PS: Power Supplies, Power Supply, Bench Supplies, Transformers
Unfortunately there's no ground connection on the supply, and I can't locate a schematic for it. Any ideas for using this particular supply with my project? Or is it a writeoff?
Thanks
That appears to be a 28V supply, which will give you 0 and +28V. Not what you need.
OK, that's what I thought. Live and learn
The instructions for the preamp say wall warts can be used. I assume I could connect two 30v wall warts together in the same way I connected the batteries?
If their outputs are isolated from the mains, then yes. This will probably be the case.
Why not buy or build a proper power supply?
I was hoping to buy rather than get into another project at this time. Anything you can recommend? The Pearl 2 already has voltage regulation and filtering (doc here) http://www.passdiy.com/pdf/PEARL 2.pdf
Thanks for your advice.
If the output is isolated.
I can't tell if it is or not. Can you tell from the photo and data sheet linked below? Thanks again.
An externally hosted image should be here but it was not working when we last tested it.
http://dl.dropbox.com/u/370002/PS%20data%20sheet.pdf
The power supply has an isolated output.
You can safely use two of them to create a bipolar supply.
Connect the - of one supply to the + of the other supply.
Thanks.
Sorry, I tried to look but for some reason I could not get the pdf.
NP thanks for the help.
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