Tube Direct Box Power Supply PCB

This is a very quiet linear supply to supply high voltage for my anodes (+240V) and low voltage to my tube filaments (+6V3). I used a fairly conventional simple 2 transistor with zener reference feedback type of supply with a darlington stage as a pass element for my high voltage supply, and a good old fashioned LM317 with a slow turn on circuit for my low voltage. Again, make sure you leave sufficient room around pads/tracks to prevent arc over for the high voltage circuit. I have individual fusing on each of the supplies as required by IEC. This is a very quiet supply and I am very happy with the beautiful PCB supplied by PCBWAY. Consistent high quality with no issues whatsoever.