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I have tried substituting crystals (and testing those crystals on the workbench). Also swapping among my four available 6AZ8 tubes.
The 270 pf cap is new. If you go back a page or two, you'll see that I already replaced most of the components in the oscillator circuit. Nothing left to replace in the immediate vicinity except R248, the 47K resistor, and I measure 47K resistance at pin 6, as per the resistance chart.
Yes, I'm looking forward to making this set work . . . someday. It's pretty interesting, so far. The CTC-4 is one of those stops on the road between the CT-100 and later RCA color sets that I've worked on. When it gets frustrating, I just work on something easier for a while. The TV will still be there waiting, next day -- or next month!
Phil Nelson
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