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OK. I'm still trying to understand this. You said what I'm measuring on the VTVM is residual 21.25 MHz signal voltage??? Then there's -120V DC in addition that goes to CRT? I guess I need to know more about how this circuit works and what it does. I'm in uncharted waters. At R119 (or around R119 as I'm looking at the schematic) there's a -120 volt demodulated video signal that goes into the video amp. Along with it, there's residual 21.25 MHz voltage that needs to be "tuned out" by adjustment of T-103? The residual voltage would cause an issue with the demodulated signal going into the amplifier tube??? Or am I WAY off base?
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