The purity and blue lateral magnets were universal. I would not try to use the Admiral yoke. The Zenith yokes have two adjustments (at least mine does) that look like fishing line. I have not seen that on any other round yokes. For test patterns, I got a crosshatch, color bars and an indian head and made up a VCD. Unfortunately, the VCD is all I have left of it after my computer crashed after the big Christmas power failure.
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