A bit of confusion on the horz sweep ( cathode current ) adjustment.
The sams shows all these steps to do it...
https://imgur.com/iZJm7bP
however, here this guy, ( who puts up very useful videos ) , did not show those steps, or omitted them.
Where they not needed and just skipped? Or done but not shown? I'm not sure what I'm seeing here, and if I should use that as guide for mine. ( also being RCA, same output tube )
https://www.youtube.com/watch?v=uBkSfc0aq8U