Hi all,
New member here.
I built an Access 312 project (basically it is 4x preamps of 1970’s vintage API design in one 19" rackmount enclosure, with each preamp being a separate individual card mounted on its own standoffs, and 4 cards fit into a single 19" rackmount case).
I tried to use a switching power supply with a switching-PSU-filtering card and although it worked functionally, sonically it didn't work that well. The preamps sound great but I cannot seem to completely eliminate a high pitched ringing that seems to be coming from the PSU and overall it's not quiet enough for my tastes.
So I am giving up on the switching PSU idea, and I want to build an external linear PSU.
On top of that, I want it to be a dual PSU so I can power 8 of these cards at once in two 19” enclosures. Or, maybe I can get away with just one PSU and run them both off the same PSU, which is one of my questions below.
I basically need the following from the PSU: +16V, -16V, 48V, 0V (ground), and a chassis ground from a PSU. And I want it to terminate in two individual 5-pin XLR’s which will go into my two 19” preamp enclosures.
The original switching PSU is supposed to be able to power 2 full 4-preamp units (so that = 8 preamps in total) and the original power supply specs that were supposedly capable of doing so are 1600ma for the +16 and -16V, and 140ma for the 48V lines.
I was looking st the DIYAudio Universal Power Supply for this task.
If that build would be up to this task, I need to build 2x units of the universal PSU's or can I get away with powering all of this with only one unit?
Also, if I need to build 2x units, I want to do it all in one enclosure. Which of the enclosures sold in the DIYAudio webstore would fit 2 completed Universal PSU kits?
Lastly, if I do need to make 2 units, can I use a single IEC inlet to both of the PSU’s on the case? Or if I can get away with just one PSU to power these units, can I just run two different sets of wires off the PSU to two separate 5-pin XLR outlets, and then to my project enclosures?
Sorry for the naivety, I am very new to building PSU’s from scratch… I have built a lot of gear from mics to preamps, but I have always relied on pre-designed PSU’s and even if I’ve built them, there have been instructions. But I think I am ready to tackle a DIY PSU at this point, purpose-built for my project at hand.
Thanks!
New member here.
I built an Access 312 project (basically it is 4x preamps of 1970’s vintage API design in one 19" rackmount enclosure, with each preamp being a separate individual card mounted on its own standoffs, and 4 cards fit into a single 19" rackmount case).
I tried to use a switching power supply with a switching-PSU-filtering card and although it worked functionally, sonically it didn't work that well. The preamps sound great but I cannot seem to completely eliminate a high pitched ringing that seems to be coming from the PSU and overall it's not quiet enough for my tastes.
So I am giving up on the switching PSU idea, and I want to build an external linear PSU.
On top of that, I want it to be a dual PSU so I can power 8 of these cards at once in two 19” enclosures. Or, maybe I can get away with just one PSU and run them both off the same PSU, which is one of my questions below.
I basically need the following from the PSU: +16V, -16V, 48V, 0V (ground), and a chassis ground from a PSU. And I want it to terminate in two individual 5-pin XLR’s which will go into my two 19” preamp enclosures.
The original switching PSU is supposed to be able to power 2 full 4-preamp units (so that = 8 preamps in total) and the original power supply specs that were supposedly capable of doing so are 1600ma for the +16 and -16V, and 140ma for the 48V lines.
I was looking st the DIYAudio Universal Power Supply for this task.
If that build would be up to this task, I need to build 2x units of the universal PSU's or can I get away with powering all of this with only one unit?
Also, if I need to build 2x units, I want to do it all in one enclosure. Which of the enclosures sold in the DIYAudio webstore would fit 2 completed Universal PSU kits?
Lastly, if I do need to make 2 units, can I use a single IEC inlet to both of the PSU’s on the case? Or if I can get away with just one PSU to power these units, can I just run two different sets of wires off the PSU to two separate 5-pin XLR outlets, and then to my project enclosures?
Sorry for the naivety, I am very new to building PSU’s from scratch… I have built a lot of gear from mics to preamps, but I have always relied on pre-designed PSU’s and even if I’ve built them, there have been instructions. But I think I am ready to tackle a DIY PSU at this point, purpose-built for my project at hand.
Thanks!