I hope you enjoyed the DIY tube amp VS transistor amp video :-) If you now want to try building your own tube amp then you can find the schematic of my design here. It works perfectly fine with 230V AC. But be careful when working with such a voltage. See the disclaimer in the video. Of course the shown schematic is not perfect. You can tweak some resistor/capacitor values to alter the output sound. So feel free to google more about the subject because I am not a tube amp expert. Happy tinkering :-)