This is a kit with the vacuum tubes, the transformers and all the needed resistors and capacitors to make a vacuum tube power audio amplifier. Check the schematic, the part list and how to assemble this circuit.
Homemade AM radio based on vacuum tubes and a regenerative coil configuration. It uses 2P2 tubes and it has low power output but it works and we can receive AM radio channels. Learn how it works, see the schematic and test it out.
Homemade coilgun with separate PCB for each stage. Big coils, huge high voltage capacitors and thyristor control for powerful magnetic field. Very high speed metal bullet detected with phototransistors.