Restoring a RCA 21CT55

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I see that on pages 6 and 17 of the T13, RCA calls for setting the ultra voltage at 25KV.

What I’m trying to understand is how does this relates.

In the RCA data sheet for the 21AXP22A,

RCA states: max 25KV ultor voltage.

RCA states: equipment design range with any ultra voltage 20 to 25KV.

Look I’m not a tech, my 41 year career after the Navy was real estate law. Just trying to understand.

I remember Mike telling me that the Sams procedure for alignment was incorrect, don’t remember the specifics. This would not be the first time service manual’s are incorrect.