Here's a picture of the upper portion of this TV's Schematic for anyone following along. R62 is being feed b+ from the focus control.
https://live.staticflickr.com/65535/...25cda511_b.jpg
Hopefully not to confuse more, but here's most of the Riders schematic on this TV. They show the 6V6 screen supply coming from before the 390 ohm feeding the plate. Not that it maters much, just interesting that it's not the same.
https://live.staticflickr.com/65535/...4b26de80_b.jpg