I have seen some of these cap boards for the ST-70, but some say they are recommended for use with a solid state rectifier only. What's so wrong with using the 5AR4 with these boards? The capacitance is a lot higher on the new boards, which would make me think there would be a larger inrush of current using a solid state rectifier than with a tube.
I intended to make my own cap board. I want at least 30µF at >500V. I found on DigiKey some decent capacitors that won't break the bank for me. They are 68µF caps at 250V and 400V. If I get 4 of each and series one with the other, I get (4) 34µF at 650V.
In some schematics, though, I see some other resistors across each capacitor. First off, what are they for? Do I have to have them?
Are there any other considerations I need to take when making the power supply? I intend to follow the original schematic pretty closely (after all, I'm not increasing the capacitance that much).
Kyle