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Tom, you have sharp eyes, yup that is a 1/2" r-to-r SONY videotape. Also might note not one but TWO HP-35 calculators (1974) and a Schaub-Lorenz Weekend T50K radio (1964). I have a serious old technology Jones.
The convergence frame is indeed a very brittle plastic and it seems as if without the break in the collar I could never have gotten it off the tube. In addition to the collar break there is a break in one of the clover leaves such that the coil and magnet are twisted kinda sideways. I will post pictures in a while. The suggestion of making a new frame with printing is good (I do have access to a 3D printer), although I don't know how flexible that stuff is once it has cooled, and flexibility is a real issue in stretching it over the tube socket.
Techguy46
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