All-semiconductor regulated HT PSU

[Skywave]

We've all met hi-stab. resistors: often they have pink coloured bodies; sometimes they're all black. I believe that the pink ones have a spiral cut; not sure about the black ones. But both have one feature in common: their end caps. Unlike traditional carbon composition types, these end caps fit round the ends of the resistor and as such, will significantly reduce moisture ingress, compared to the 'standard' carbon compo. types.
Sounds relevant to me . . . but to what degree?

Al. / Aug. 5, '14 //