SpaceCharger V3.1

This project is about a working 12V tube amplifier, described as follows.

In this post i will share:

• Italian Thesis Available at this link to see the process to reach this result
• Gerber files to build your own pcb
• Schematic to remix the project as you wish [Credit if you share please] (Please tag me if you significantly improve the design, to improve even my prototype)

The schematic and gerber are available for free in Easy Eda editor, OSWlab:

The amplifier is fully working, with common USB-C trigger board as powe source, drawing 28W, and giving an output of almost 0.12W, not so good, but pretty good to listen to.

Few tweaks can be, done and i'll improve the design further in the future, the first thing is for sure adding a global feedback to improve bandwith at least till 20 Hz, since now the frequency response is 150 Hz - 40 kHz

The Output transformer need an impedance of 800 ohms, i used a pa OT line transformer at rating 100V and 15W taping, so i have a 667 ohms impedance, the best i could find in italy.

The circuit is rated for maximum 6 Amps, by trace calculations and clearance drc on PCB.

Contact me or Comment if you need more info.

Thanks again to Sergey Engel and u/2748seiceps for trubleshooting and advices.

NOT FOR COMMERCIAL USE