floobydust:
Thanks for this particular RCA schematic you attached.
I have the exact same RCA receiving valve manual RC-29, but in Spanish. Published by Editorial Arbo from Argentina, @ 1974.
Although the very first page indicates that this is an authorized version from RCA Corporation, Electronic Components, Harrison NJ, the book has a serious omission:
The project 29-22 Series-type stabilized voltage supply (Fuente de Alimentacion estabilizada tipo serie) does not include a schematic! Seriously!
It is the only topic in the whole book which is missing an attached image or schematic.
Other than that, the Spanish description and parts list is wholly accurate, word by word.
Back in my tube experimenting days of the mid 1970s, I remember reading the circuit description and being enticed to build it, but then becoming frustrated that without a schematic I wouldn't be able to do so.
Roughly 45 years later, I finally see what the schematic looks like.
Thanks!