[old_tv_nut]

All sets can show a little bending at the very top with VCR playback, even those designed after VCRs came into use. It will vary with different tapes and VCRs. If it is within the first few percent of the raster, just turn up the height a little to hide it off the top of the screen. If it extends very far from the top, check the capacitors and resistors in the horizontal AFC section.