[Keri Szafir] is no exception, and she’s produced a stereo tube amp with a few modern features. Electrically it’s a relatively conventional single-ended design using a double triode and a ...

With the wealth of cheap and highly integrated audio amplifier modules on the market ... Especially when those parts include vacuum tubes, and doubly so when you make the vacuum tubes from scratch ...

Generally, most amplifiers use either vacuum tubes (tube amps) or transistors (solid state amps) to translate the current from your electric guitar to audible signals played through speaker cabinets.