Schades curves in the Radiotron Designer's Handbook (4th ed.)
 

The ones below (the first two) for peak, average and RMS rectifier current are a bit clearer than the Schades curves printed in RDH4 Chapter 30 when viewed in the link below (RCA Vacuum Tube Design book, book pages 190 & 191) the curves are in two halves, one half in one pic the other half in the other pic so join together for the full set of curves:

http://www.nj7p.org/Manuals/PDFs/Books/RCA_1940_VTD.pdf

I also happened to come across some curves for determining the series resistance dissipation for rectifiers by A.P.Kauzman (third picture) I tried it against the method in RDH4 for determining the RMS supply current (and thus dissipation) along with Schades curves and it was more or less in agreement, note that Rs includes copper losses...(Vout/Vin)squared*Rpri + Rsec in any transformer that might be used as the supply source, the curves can be found in the link below (book page 95):

https://www.americanradiohistory.com...w-1947-Mar.pdf

Lawrence.