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Sams Sheet (62-16) wants 21VAC from chassis ground to CRT pin 1, and 28VAC from chassis ground to pin 11 of your CRT (or a difference of 7 volts). Your transformer isolates the CRT from the chassis ground, so those readings will be gone. But you should measure 7 volts out of your transformer during operation, across pins 1 and 11.
You should have replaced the CRT filament in the AC/DC filament string with an appropriate resistor (someone out there could tell you how many Ohms and Watts). You should be able to measure 7 Volts across it and the 21 and 28 volt readings on either side of it to chassis ground. If not, there's a problem too.
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