Dove right in! Help with RCA 21-D-8628

I'm 90% certain this set has a B+ boost. I tend to see the circuit lines each time I look at the schematic. I tested each resistor for it's capacity, they were all within a 10% range, some a little moreso.

What bothers me is that I keep forgetting to sit down and trace the current lines through the vertical and horizontal. Assumption tells me that the main transformer's job is to power every 'area' (vert, audio, video, horiz) at once. So, timing the travel of current through each area is the job of the caps and resistors. If something is doubled...we assume it could be a resistor?

How did you narrow to think to B+ vs. vertical or horizontal?