[usradcoll1]

Originally Posted by regenfreak

In this two part video, he used very much the same unregulated B+ circuit like the link I mentioned earlier (https://antiqueradio.org/bsupply.htm):

https://www.youtube.com/watch?v=qIm9SibSK-c

As an experienced builder, he ran into all kind of problems even with this simple circuit. I think he abandoned it in the 2nd video. It demonstrated the difficulties of building a reliable B+. At the bottom of article there is an alternative circuit using full wave rectifier and zener diodes in series. It is probably a better design:

https://antiqueradio.org/art/PowerSupplySchematic.jpg

Another restorer used the same design to modify this 1940 Silvertone valve battery eliminator (two parts):

https://www.youtube.com/watch?v=PFNUtrJsCxU

I've been working with these battery valve radios for a good many years, still a pre-teen. The HT supply was always rather simple, but the LT was always a problem. The high value, low voltage electrolytics just weren't that easily available.
For some of those old junky radios, I just used home-brew HT power supply and "D" cells for the LT, as they were inexpensive.
Dave, USradcoll1, always trying to make-do.