tube DAC noise

If using NOS tubes, always have them tested for noise and microphonics. Upscale and Andy at Vintage Tube noise test every tube sold. Brent Jessee charges $10.

There's no noise or tube hiss from my Audio Note DAC.

No noise from my MHDT Lab Pagoda using the stock tube or its replacement.

There's a reason (OK, more than one) why Jolida / Black Ice stuff is so cheap.  Build quality on some of their products leaves something to be desired.  No tube noise from my MHDT Labs Orchid.

...thanks greatly for the experience y'all.  I tried different tubes, all from upscale, and was never able to rid the unit of noise so I sold it off.  Recently been considering a couple different dacs and some are tube based and have naturally been hesitant to try.  Will have to keep experimenting with an open mind.....

Border Patrol uses one tube as a rectifier. No tubes in the output stage. Good reviews and owned by quite a few members.