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Old 11-13-2017, 10:24 AM
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benman94 benman94 is offline
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Join Date: Jun 2011
Location: Detroit, MI
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Regarding the correct 25 kV ultor voltage, see this quote from the RCA booklet entitled "Technical Features of the RCA Victor Model 21-CT-55 Color Television Receiver":

Quote:
The RCA Victor Model 21-CT-55 color television receiver is a direct-view console which reproduces high-quality television pictures in full color from a standard color television signal, and automatically, with no adjustment or attachments, high-definition black-and-white television pictures from a standard black-and-white television signal.

The picture displayed on the screen of a 21-inch tricolor kinescope, the 21AXP22, has an area of approximately 255 square inches (2 1/2 times the CT-100). The 21AXP22 employs electrostatic focusing and electromagnetic convergence. Ultor voltage is 25,000 volts. In conjunction with the 21-inch tricolor kinescope, the convergence and purity arrangements provide ease of adjustment, and increased accuracy and stability of color registration.

One of the customer convenience features in this receiver is that convergence and focus are no longer customer adjustments from the side of the cabinet but are internal and are preset by the service technician.

Additional features include: a removable top panel to facilitate servicing and adjustment, and the location of most of the functional controls at the receiver front. These control are located under the tilt-down control cover or behind the removable wood panel directly below the control cover. Dual loudspeakers are provided for sound reproduction.
(Emphasis added by yours truly.)

I'm still failing to see what is ambiguous about the RCA specified ultor voltage, but to be honest I really don't care any more... I tried to help, I only hope you correct the issue before your flyback goes up in smoke.

Anyway, here is the factory service data you asked for "1954 No. T13", published November of 1954: http://docdro.id/HBjbl9P

You'll note that the only 3.3 MOhm resistor is in the grid circuit of the triode section of the 6AN8 that serves as the R-Y amp and phase splitter. I'm not sure what resistor Mike replaced in the 6BD4A circuit with two 2.2 MOhm resistors in series. Apparently he's smarter than RCA's own engineers. I guess we should all defer to some random guy with a soldering iron instead of the factory service literature...
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