11 Jan '13, 12pm

A really, really tiny tube amp

A really, really tiny tube amp

Switch mode PS in a tube amp!? Theres your hum… thats like putting a Picaso in a frame from wal-mart. Probably has an AC filament supply rather than DC too, even more hum. You could probably find a small enough HV transformer with a filament winding and then rectify both and still fit, just wind your own or take a couple of very small 120V step downs and hook up the secondaries 1:1. And doesn’t pignose make a tube amp not much bigger than this? And while I’ve seen many tube amp rat nests (in full production models no less), he could probably help his noise issues a little just by addressing that layout a little. Still very cool to see someone having a go with tubes. Which are actually a lot more alive and well than most people think. Just outside of the direct consumer world. If you listen to AM/FM or watch TV via an Antenna, its probably being brought to you via a very la...

Full article: http://hackaday.com/2013/01/11/a-really-really-tiny-tube-...

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