Cristiano Maker

 One of my passions are antiques, specially if they have some engineering or electronics envolved. Since I was a child, I had contact with antiques from my grandparents, and one of the things I remember is an old kerosene pressure stove. Some time ago, I decided to buy one, just for decoration, but I also love to keep things working, if possible, so, I decided to turn it on, and made a simple tutorial on how to start it. I made a vide that is available on YouTube, please check it below: I added some subtitles to the video so you could understand better, but I'm also going to write it here: 1 - Put some kerosene in the tank 2 - Fill the small cup below the head with alcohol (+ 90% is good) 3 - Light up the alcohol and let the head warm and start vaporizing the kerosene 4 - Once you feel the pressure increase, give some pumping to help it increase even more 5 - The kerosene vapor will light by itself with a beautiful blue flame (if you need more pressure, pump it more, for less, rele...

 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 li...