Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Half a century ago, vacuum tubes were very common in audio ...

If you ever wanted to build your own tube amplifier but you were intimidated by working with high voltages, [Marcel]’s low-voltage tube amp design might spark your interest. The design operates with a ...

[Blackcorvo] wrote in to tell us how he took a cheap “retro” guitar amplifier and rebuilt it with sub-miniature vacuum tubes. The end result is a tiny portable amplifier that not only looks the part, ...

It will take a much better command of written Japanese Korean than my paltry non-existent skills afford to suss out full details on Gakken's vacuum-tube iPod amplifier, but damn, this looks like a fun ...

This is a kit from a Korean company known as Gakken. You get all the parts to put together your very own tube amp receiver as well as a pair of speaker to connect to it. The benefits of tube amp sound ...