2022-02-27, 08:22
The easiest source of USB linear supplies is audio-targeted ones, typically DAC use, however since they're aimed at the golden ears market you'll end up paying audio woo-woo prices for them. I managed to pick up an LHY Audio linear USB supply relatively cheaply, this isn't a brand as such but a generic label that various companies sell clones under. It's pretty decent, Talema sealed transformer, LM1085 LDO regulator, Philips electrolytics, etc. If anyone's interested I can hook a scope to the output and see what the noise is like, but I'd expect it to be minimal.