On going Zenith 25MC33 roundy restoration

[marty59]

With the Service/Normal switch in the service position, you should be able to verify vertical centering. If it's off-center there should be some nylon/fishline "loops" that are hanging out of the yoke. Pulling on one will affect the horzontal, the other loop the vertical. Most likely linearity and height will be difficult to achieve. See if the cathode capacitor is still the original and check B+ and load resistors.

You should have that set playing in no time!