Zenith Roundie Progress Update

[compucat]

This set does have automatic degaussing. If I display a red raster and rotate the set, I can watch the purity change. I read elsewhere in this forum that round tubes are more sensitive to magnetic fields. Is this true? This is my first color roundie. I always thought convergence was a one-time setup procedure but someone posted that every time a roundie is moved to a new location, purity and convergence may need to be redone. Is this just a characteristic of early color tv? If it is, I don't have a problem with it. I'll redo the setup in its final location and I expect everything will be fine with it. As long as I don't move it, the picture stays great.