On Tue, 04 Jun 2019 10:50:27 -0700, three_jeeps wrote:

From the Radiotron Designers Handbook, RCA, 1952: pages 1164-1168 (I
could not paste in a number of curves, one of which is Direct Voltage at
input of filter versus DC Load in mA.)
(This book is in my library but also in .pdf's around the web...)

Clear as mud!