[Radioroslyn]

I guess if I had the time to measure the HV winding of the power transformer I could give you a good answer to your question but haven't so far. I can tell you that on these older set( from the late 1920's and early 30's) they use a low value caps in the filters because that's all that was available at the time. The power transformer is going to be rated at a voltage that is higher that what you would find on newer sets. This is why I would recommend a higher voltage rating for the input cap for this power supply.
Terry