> On Jul 20, 2015, at 18:02 , Tothwolf <tothw...@concentric.net> wrote: > I replace wax paper types with polyester (mylar), polystyrene or ceramic > discs, depending on how they are used in the circuit (note however that for > wound foil types, modern replacement parts do not mark the outside foil, > which needs to be at ground potential in many tube circuits, otherwise the > circuit can pick up noise and hum).
Funny that you mentioned that! I just watched a YouTube video today about how to experimentally determine which lead is connected to the outer foil for applications where that's important. Modern film caps may have a stripe on one end, but it doesn't appear to reliably indicate which lead goes to the outer foil. -- Mark J. Blair, NF6X <n...@nf6x.net> http://www.nf6x.net/
