Heya Folks,
Just got an interesting parts newsletter from Digikey and something piqued my interest - the 40 and 60 watt CUI power supplies, as listed in the title.
Curious if anyone has stacked these - like 10x 48V power supplies in series to create 480V B+ output for say, an EL34 or KT88 tube amplifier?
Any experience is welcome.
Cheers!
I can’t comment on stacking these, however, I can say that the 150mV of noise on the output of these power supplies could made them less than ideal for an audio application.
Hi Kristof,
Thank you kindly for the response. I agree the 150mV of noise is high for something like a preamp and definately out of the question for a phono stage, luckily push-pull tube amps are very tolerant of PSU ripple due to the topology and driver stage driver decoupling… which is far easier at 50+ KHz than 120Hz (we did a mobile tube power supply switching at 80KHz and providing 250V). The output stage naturally cancels ripple as well as the output transformers in these will act as a choke.
My concern with these convenient “brick” modules is reliability in series, so that the outputs are floating, other than the top and bottom module 
May have to “Just Do It!” and report back with experience for others 
Cheers!
