After my first tube amp , I decided to try a battery powered one. There is not a lot of information about guitar tube battery powered amps on internet, but I found some resources. My search began on YouTube and I found a video of a guy that wrote the schematic link in his video description here . I just followed it, mounted the components of the amp (all point-to-point wired) inside a large tin can and used my small 6 inch speaker connected to it. The amp is powered by 10 x 9v batteries ( for tube plates ), one 1.5v battery ( for tube filaments ) and 3 x 1.5v batteries in series, providing 4.5v of negative bias. The tubes used, are one 1Q5GT and two 1T4, early used in battery powered radio receivers. It has just two controls - volume and tone. Here is the schematic: Here is the power supply schematic: And here, the built amp: Check out my videos on YouTube of this amp playing a song from my computer and also a song from my guitar: Hope you enjoy and if you plan to make an amp like t