I'm successfully running a 6n2p SRPP across a 400V rail despite it's max anode voltage being 300V, and would ideally run one across 500V or 750V but I'm a bit worried about them arcing inside (or on the base).
The 6n6p has a max anode rating of 450V so perhaps that would be better for 500V, although 750V may be pushing it a bit.
Has anyone experience with these issues? The top tube heater voltage would have to be gently fixed with a high resistance at some mid-value too.
Is there a favourite noval tube for these voltages or does everyone go octal at this point?
The 6n6p has a max anode rating of 450V so perhaps that would be better for 500V, although 750V may be pushing it a bit.
Has anyone experience with these issues? The top tube heater voltage would have to be gently fixed with a high resistance at some mid-value too.
Is there a favourite noval tube for these voltages or does everyone go octal at this point?